GENERAL INFORMATION

This handbook has been designed to give the user a general description of
a Rubberall® fully adhered roof system. It is intended as a broad reference
aid and not intended or meant to be all-inclusive.

Prior to installation of a Rubberall® roof system it is recommended that the

installer view the Rubberall® roof system installation guide. This DVD can be
obtained from your Plytech distributor.

1
PRECAUTIONS AND WARNINGS!
Read caution labels on all adhesive, primer and sealant containers. These
materials contain petroleum distillates and are extremely flammable. Care
must be taken to avoid open flames. Do not smoke when using these prod-
ucts. Product labels, material safety data sheets and technical information
sheets contain information for proper use of these products and should be
consulted.

Adhesives should be used in a well-ventilated area. Avoid inhalation of

fumes. Care should be taken to ensure fumes do not enter the building through
windows or fresh-air-intake ventilation fans.

Avoid adhesive contact with eyes. Safety glasses should be worn. If

adhesive comes in contact with eyes, flush for 15 minutes and call a doctor.

Avoid adhesive contact with skin. Chemically resistant gloves are required.
If adhesive comes in contact with skin, wash with soap and water.

Safeguard against falling by reading ladder manufacturer’s warnings and by

installing safety rails or scaffolding as required. Surfaces can be slippery when
wet or covered with frost. Always work with a friend and never work with your
back to the roof’s edge.

Care must be taken with fasteners that penetrate a deck to avoid contact
with plumbing or electric wiring.

Reroofing: ALL wet materials should be removed for the best results.

Reroofing over a wet substrate is not good roofing practice and will have poor
results.

Condensation may occur when applying Bonding Adhesive at temperatures

below 4.5°C when there is high humidity. If droplets of water are apparent,
discontinue installation until weather conditions improve. At that time reapply
a thin coat of adhesive over the old coat of adhesive and continue installa-
tion.

Allow adhesives to adequately dry to avoid blistering of membrane. Given

time blistering will probably go down and roof will perform for the long term.

2
Positive drainage of at least 3mm in 300mm is required for warranty
coverage.

Petroleum products such as roof cements and coatings WILL deteriorate

EPDM membranes and should NEVER be used on an EPDM membrane
roof.

Warranty terms and conditions can be found on the Rubberall® website,

www.rubberall.com. Use of other products will invalidate the extended
membrane warranty.

TOOLS NEEDED
The following list is for reference only, as tools and equipment may vary from
project to project:

2-inch steel or hard rubber hand roller Stiff push broom

Page 4 onwards
9-inch paint roller frame & several Safety glasses and eye cleaning
medium nap, solvent compatible roller solution
PLYTECH PRODUCTS AVAILABLE
covers

1.14mm
Caulk gun
& 1.52mm RUBBERALL ®
EPDM Roofing
Lumber crayon
Membrane
Screw gun and hammer drill Hacksaw and blades
Synthetic rubber (Ethylene Propylene Diene Monomer) membrane used for
flat and low-sloped
Solvent roofs.
resistant rubber 1.52mm is recommended
gloves Rubberall®for roofing
Scrub Pad as it is easier
to install in a fully adhered application without getting wrinkles in the mem-
brane. 1.14mm
Stir stick thick may also be used as aTin
for adhesives roofing
snips membrane however this
thinner gauge membrane is not recommended for the first time installer.
Scissors & tape measure Hammer
Rubberall® membrane panels come in a variety of sizes: as small as 3.048
metres x 7.62
Sand paper formetres; as edge
metal drip large as 12.2 metres x 30.48
Duct tape metres and almost any
size in between. For your convenience, smaller rolls are folded and rolled on
1.83 metre
Chalk line cores. Larger rolls are on 3.35 metre
Cottoncores.
rags

APPROXIMATE
UL approved can for solvents
WEIGHTFireOF EPDN
extinguisher

PLYTECH
Utility knife PRODUCTS AVAILABLE
Paper hole punch

3
RUBBERALL® & PLYTECH PRODUCTS AVAILABLE
1.14mm & 1.52mm RUBBERALL® EPDM
Roofing Membrane
Synthetic rubber (Ethylene Propylene Diene Monomer) membrane used for
flat and low-sloped roofs. 1.52mm is recommended for roofing as it is easier
to install in a fully adhered application without getting wrinkles in the mem-
brane. 1.14mm thick may also be used as a roofing membrane however this
thinner gauge membrane is not recommended for the first time installer.

Rubberall® membrane panels come in a variety of widths: as small as 3.048

metres; as large as 12.2 metres x 30.48 metres and almost any size in
between.

Approximate weight of EPDN membrane is 1.46Kgs and 1.95Kgs per square

metre for 1.14mm and 1.52mm, respectively. Rubberall® 1.52mm membrane
has a 30-year warranty while 1.14mm has a 20-year warranty. EPDM mem-
brane has many other uses within the building industry.

Solvent Based Bonding Adhesive

Used to adhere EPDM membrane to insulations (excluding polystyrene),
plywood, OSB, concrete, block or brick. This yellow coloured adhesive comes
in 3.785 litre or 18.9 litre cans. Average coverage is 1.4 square metres per
litre. Coverage may increase depending on the porosity of the substrate.
Apply Solvent Based Bonding Adhesive by rolling to clean, dry, grease free
surfaces. Both surfaces to be bonded must be coated with the bonding adhe-
sive. An open time of five to thirty minutes is recommended before assembly
depending on ambient conditions. The adhesive should be allowed to dry
until it does not stick to a dry finger touch. Toluene is excellent for post appli-
cation clean up. Avoid prolonged and repeated contact with skin. Shelf life is
1 year when stored at temperature no higher than 32.2°C in unopened
containers.

Water Based Bonding Adhesive

A user friendly bonding adhesive used to bond EPDM to a porous rigid board
substrate such as plywood or wood fibreboard. Solvent based Bonding Adhe-
sive is recommended when using OSB Board.

Water Based Bonding Adhesive has an advantage over Solvent Based Bonding
Adhesive as it needs to be applied to only one surface when bonding to

4
plywood and wood fibreboard and the EPDM membrane can be laid onto
the adhesive without waiting for the adhesive to dry. With this adhesive you
can reposition the membrane during installation thus wrinkles are easily
eliminated. As the adhesive does not completely cure for 24 to 48 hours, be
careful not to move the membrane when walking on it. This adhesive is applied
at a rate of 4 square metres per kilogram and should not be used to seam
EPDM panels together. Care must be taken to ensure this product does not
freeze and it can only be applied when temperatures are 4.5°C and above
and with no chance of temperatures below freezing within the next 48 hours.

Follow all label directions and precautions. Shelf life is approximately 1 year
when stored in a warm room with temperature range between 4.5°C and
26.7°C. This material should not be allowed to freeze. If the product looks like
cottage cheese when opened it should not be used.

Seam Tape Primer

A solvent-based primer designed to clean and prime EPDM membrane prior
to application of tape products. Tape products will not adhere, or perform
over time, if Seam Tape Primer is not used. Seam Tape Primer must be applied
with a Rubberall® Scrub Pad.

It is also recommended for used in cleaning membrane surfaces when using

Rubber to Rubber Adhesive as it enhances the bonding of the membranes,
compared to using Membrane Cleaner. Seam Tape Primer can be used on
galvanized steel, stainless steel, and aluminium/metal drip edge in conjunction
with the application of tape products on these surfaces.

Membrane surfaces must be clean, dry and free of foreign materials. Exces-
sively dirty membranes should be cleaned with Membrane Cleaner and a
clean rag. Seam Tape Primer should be THOROUGHLY stirred before use as
the suspended solids tend to settle to the bottom of the container. During
use, re-stir frequently (every 15–20 minutes). The primer must be used full
strength – DO NOT DILUTE.

Seam Tape Primer contains ingredients which could be harmful if mishandled.

It is important to read and follow all label safety instructions. It is important
to store product in the original, unopened container, indoors, and out of direct
sunlight at temperatures below 26.7°C. The shelf life is approximately 24
months if stored in original unopened containers at temperatures between
15.5°C and 26.7°C. Rotate stock.

5
Seam Tape
A butyl tape used to adhere one membrane to another. Available in 76.2mm
x 7.62 metre and 76.2mm x 30.48 metre rolls for roofing applications and also
152.4mm x 30.48 metre rolls for landscape/pond lining applications. Seam
Tape has been formulated to provide high initial strength in both sheer and
peel. Its performance over the full range of rooftop weather is unsurpassed
as it is unaffected by heat or cold. Seam Tape Primer must be applied to the
membrane surface, with a Rubberall® Scrub Pad, prior to applying the Seam
Tape. Roll entire surface with a steel hand roller after mating the surfaces.
Lap Caulk is not required when using Seam Tape. Seam Tape is a cured mate-
rial and will not degrade in normal warehouse storage. In time, the release
paper may become difficult to remove and, for this reason, the recommended
shelf life is 12 months.

Cured Cover Strip With Tape

Cured Cover Strip with Tape comes in rolls 127mm x 30.48 metres. The prod-
uct is a laminated, cured EPDM membrane and butyl tape rolled on a release
paper and used as a “self-sticking” cover strip. Cured Cover Strip with Tape
is a black EPDM rubber based product developed for use with the Rubberall®
EPDM roofing membranes. Cured Cover Strip with Tape is used to cover cuts
in the field membrane or over the exposed fasteners attaching metal drip
edging. Surfaces should be primed with Seam Tape Primer before installation
and should be rolled with a steel hand roller after installation. Cured Cover
Strip with Tape will not degrade in normal warehouse storage. In time, the
release paper may become difficult to remove and for this reason, the rec-
ommended shelf life is 12 months. Cured Cover Strip with Tape is also used
to repair membrane if it is damaged by falling debris etc. Be certain to clean
the area to be repaired with Membrane Cleaner and prime with Seam Tape
Primer using a Rubberall® Scrub Pad.

Uncured Flashing With Tape

Mouldable EPDM membrane is used for flashing details, protrusions, T-Joint
patches and field seams incorporating angle changes. Uncured flashing has
the same ingredients as the field sheet. The only difference is it was never put
in an oven and cured. Because it is uncured it can be moulded into the shape
of inside and outside corners, pipe flashings, etc. The heat of the summer sun
will cause the flashing to cure in much the same manner as the field sheet.
Uncured Flashing with Tape has a self-adhesive backing and should be applied
using Seam Tape Primer . Uncured Flashing with Tape comes in rolls 305mm
x 7.62 metres, 229mm x 15.24 metres and 152.4mm x 30.48 metres. Store in
the original unopened packaging at temperatures between 15.5°C and 26.7°C,
until ready for use. During hot weather, do not expose to sunlight or high

6
temperatures until ready for use. Uncured Flashing with Tape will begin to cure
even while on the warehouse shelf. For this reason, the recommended shelf
life is 12 months. If the flashing has cured while in the warehouse, it will not
work as a mouldable flashing material, however if may still be used as cure
cover strip. In time, the release paper may become difficult to remove.

Membrane Cleaner
Used to clean EPDM surfaces before using Rubber to Rubber Adhesive and
also Metal Drip Edge prior to installing Cover Strip with Tape. Membrane
Cleaner should be stored in a well ventilated area, at room temperature
between 15.5°C and 26.7°C in the original sealed explosion-proof container
away from all sources of direct heat and ignition. Membrane Cleaner is avail-
able in 500mil and 3.785 litre cans. Membrane Cleaner is extremely flammable
and must be kept away from electrical equipment, sparks, open flames and
other sources of ignition. Avoid breathing vapours and use only in well-ven-
tilated areas. Handle with impervious gloves and goggles.

Rubber To Rubber Adhesive

A synthetic based polymer adhesive that is specifically formulated to adhere
EPDM sheet roofing to itself. Rubber to Rubber Adhesive has long been used
for seaming membrane panels but the introduction of tape products for seam-
ing membrane has proven to be more user-friendly and superior for long term
performance. It is highly recommended that tape products be used where
possible.

For added bond strength it is recommended that Seam Tape Primer be applied
with a Rubberall® Scrub Pad in place of the Membrane Cleaner. In this case
membrane cleaner need not be used unless the membrane is excessively
dirty or covered with talc. Lap Caulk must be used to seal all seams.

Coverage rate for a 152.4mm seam, assuming a 17.8mm application on each

surface, is approximately 27.43 metres per 3.785 litres. For rubber-to-rubber
flashing, coverage is 15.24–18.29 square metres of finished surface per 3.785
litre can, when applying adhesive to both membrane surfaces. Follow all label
directions. Cover cans when not in use. When exposed to lower temperatures
restore to room temperature prior to use. Thinning is not possible.

Lap Caulk
Used to caulk exposed edges of rubber to rubber seams, edges of uncured
EPDM flashings, tops of Termination Bars and tops of Pipe Boot Clamps.
Approximate coverage is 6.10 metres per 292mil tube. Toluene or Xylene are
excellent for post application clean up.

7
Water Cut-Off Mastic
Mastic serves as a compression gasket preventing contaminates from accessing
the roof system where the membrane has been mechanically terminated. Mastic
is applied between the substrate and membrane prior to installing Termination
Bars and Pipe Boot Clamps. Coverage is approximately 6.096 metres per
292mil tube. Can also be used as a temporary overnight sealant or water-stop.

Termination Bar
3.048 metre lengths of aluminium with holes 152.4mm on centre used to
mechanically secure membrane at walls, curbs, chimneys, etc. May be used
in lieu of metal drip edge on fascias. All holes in a Termination Bar must be
filled with appropriate fasteners.

Peel-and-Stick Pipe Boot

Multi-size (25.4mm to 165mm), pre-moulded, EPDM boot used to flash pipes.
Peel-and-Stick Pipe Boot is supplied with tape backing and release paper
applied to bottom flange. Pipe Boot should be terminated at top with stainless
steel Pipe Boot Clamps, which are included with the product.

Scrub Pad
This is a specially designed pad and handle that is used to roughen the mem-
brane surface and apply Seam Tape Primer without the user coming in contact
with the primer. Its use is highly recommended.

Steel Hand Roller

This is a specially designed hand roller that is of sufficient weight to roll seams
without tiring the user. Its use is highly recommended.
Convex Steel Roller
This is a specially designed hand roller that is of sufficient weight to roll mem-
brane into tight angle changes.

Walkway Pads
These are 0.762 x 0.762 metre skid resistant, moulded EPDM pads that can
be stuck to the membrane in much the same manner as laying tile. These
pads come with a peel and stick tape for ease of installation. They are used
on lower traffic areas and are often used for walk out decks to protect the
EPDM membrane.

Plytech Quicktrim®
Plytech developed and manufacture the original flat roofing edge trim, Quick-
trim® which was designed for the EPDM flat roofing market and has been
successfully used with other flat roofing membranes, such as TPO.

8
There are three basic components in the Quicktrim® range: Check Kerb and
Drip Edge details supplied in 2.5m lengths, with a Check Kerb External Corner
unit that allows positive secure finishing at corner details.

Components are manufactured from environmentally friendly, recyclable poly-

styrene materials and
packs contain all the fixing pins and jointing clips required for installation.

Plytech add new products on a regular basis to enhance your roofing expe-
rience. Ask your distributor for a current list.

ROOF SURFACE PREPARATION

EPDM roof membrane will adhere to certain isocyanurate insulation boards
compatible with Rubberall® adhesives. Solvent based adhesive will melt the
polystyrene. Water based adhesive will not adhere to polystyrene. The
roof membrane will also adhere to plywood, OSB (Oriented Strand Board),
and 13mm high-density wood fibreboard and concrete. Polystyrene insulation
may not be adhered directly to rubber membrane. If polystyrene insulation is
used, cover insulation with 13mm high-density wood fibreboard. Butt all insu-
lation boards together, staggering all of the joints. Any spaces larger than
6.5mm must be filled to provide a uniform, smooth surface.

Screws and deck plates should be applied at the minimum rate of 8 per 1.22
x 2.44 metre sheet of insulation, and 5 per 1.22 x 1.22 metre sheet or as
required by the insulation manufacturer. When installing insulation around the
perimeter, the fastening pattern is 1 screw and 1 deck plate every 0.61 metres
(that is 16 per 1.22 x 2.44 metres. Examples of fastening patterns are shown
in Figure 1. NOTE: Extra fasteners should be installed around protrusions
such as pipes, chimneys, skylights and irregularities in the roof deck.

Do not install more insulation than can be covered with EPDM membrane by
the end of the day.

Reroofing over a wet substrate is not good roofing practice. All wet material
should be removed and replaced.

The roof surface must be dry. Moisture will cause poor membrane adhesion
and blistering.

The roof surface should be swept to remove dirt, dust and other loose
particles.

9
Good roofing practice dictates that the roof surface must have positive
drainage of at least 3mm in 300mm.

Figure 1 Fastening Pattern

LAYING OUT RUBBERALL® EPDM

MEMBRANE
Unroll the EPDM membrane over the substrate so that the sheet is in the
desired position and is wrinkle free. If more than one sheet of membrane is
required always place the first sheet of membrane at the low point on the
roof. Subsequent sheets would over lap the prior sheet by at least 102mm if
using seam tape or 152.4mm if using rubber to rubber adhesive, moving up
the roof. Care should be taken to ensure membrane overhangs perimeter of
the roof at least 76.2mm (Figure 2).

Allow the EPDM membrane to relax. Depending on weather conditions, this

could take from 15 to 30 minutes. Use strips of duct tape on the upper edge
of membrane to stop the membrane from moving.

10
Figure 2

PIPE PENETRATIONS
When laying out the field sheets and a pipe is encountered, roll the folded
membrane to the pipe. Be sure to maintain the proper alignment of the sheet
with the roof edge, wall, and seams. Make a straight cut from the pipe to the
nearest edge of the field sheet (Figure 3). Cut a hole to match the diameter
Figure 3

11
of the pipe and roll the field sheet around the pipe. Check the final position
of the sheet, making certain the membrane does not bridge up the pipe.

PROTRUSION IN THE ROOF

When laying out the field sheet and a curb (chimney, skylight, etc.) is encoun-
tered, unroll the folded membrane up to the curb while maintaining proper
sheet alignment with walls, perimeter edges and other protrusions (Figure 4).

Figure 4

Measure the width and depth of the unit and transfer the corresponding dimen-
sions onto the folded membrane. Draw an X inside the box. Cut the X mark
and from one corner cut a straight line to the nearest edge of the membrane.
Roll the membrane around the unit, leaving a triangle of membrane turning
up all four (4) sides. Using a standard paper punch or scissors, punch or cut
a round hole at every angle change of the membrane at the outside corners.
(This will prevent the cut in the membrane from continuing.)

After all cuts are made and the membrane has been correctly positioned, fold
the membrane back and begin bonding procedures. After the field membrane
is complete, bond the triangles up the sides of the unit (chimney, skylight,
etc.). Take care to bond the membrane into the angle change so that the
membrane is completely adhered. Membrane should travel up the wall at least
200mm (Figure 5).

12
Figure 5

ADHERING MEMBRANE WITH SOLVENT

BASED BONDING ADHESIVE
Fold the sheet onto itself so that half of the sheet is exposed. Take care to
avoid wrinkles (Figure 6).

Figure 6

13
Open and thoroughly stir the Solvent Based Bonding Adhesive (available in
either 3.785 or 18.9 litre containers). Using a solvent accepting paint roller,
apply the Solvent Based Bonding Adhesive to the substrate and the EPDM
sheet at a rate of 5.29 square metres per 3.785 litre container. The adhesive
must be applied to 100% of both surfaces in an even coat without globs or
puddles. Allow the adhesive to dry to finger touch tacky but not stringy. If the
membrane is adhered to the substrate before the adhesive has dried, blisters
will form under the membrane. Smaller blisters will normally disappear after
a few days without causing the membrane to loosen from the substrate over
time.

Fluff air under the top half of the sheet and roll the sheet onto the glued sub-
strate. It is important to roll from the middle of the sheet first, followed by the
ends (shown in Figure 3). Do not let the ends of the sheet roll ahead of the
middle. This will cause wrinkles. With a stiff broom, lightly brush the fully
adhered portion of the sheet to the substrate to ensure 100% adhesion. Do
not apply too much pressure as to cause the EPDM to wrinkle.

Remove the duct tape from the upper half of the membrane panel. Fold back
the remaining unglued portion of the sheet and repeat the process (Figure 7).

Figure 7

If installing more than one sheet, always work up the roof so that water flows
over and not against the lapping edges. Allow the next sheet to overlap the

14
one already installed by 76.2mm. Use duct tape to hold this sheet in place.
Again lay the sheet back halfway and apply Bonding Adhesive to both surfaces
and proceed as you did with the first sheet.

NOTE: Do not apply bonding adhesive to seam areas (see figure 8). Thus no
bonding adhesive should be applied to the rubber already installed as well as
no bonding adhesive should be applied to the 76.2 to 152.4mm overlap on
the subsequent sheet. Seam tape primer with seam tape is recommended
when seaming membrane to membrane (Figure 8).

Hint: If bonding adhesive is in area to be seamed, apply duct tape to adhesive,

roll with hand roller and peel off duck tape. If any adhesive remains, repeat
process.

Figure 8

ADHERING MEMBRANE WITH WATER

BASED BONDING ADHESIVE
Water Based Bonding Adhesive is to be used only for bonding Rubberall®
Membrane and Flashing to underlying roof surfaces, i.e. decking or insulation,
walls, penetrations, etc. Water Based Bonding Adhesive is not to be used for
field seaming of EPDM Membrane or Flashing. The application of this adhesive
should be as follows:
l Apply adhesive at temperatures of 4.5°C and above with no chance of
freezing in the next 48 hr.
l Water Based Bonding Adhesive comes in 2.5, 5, 10kg containers and 18.9lt
container.

15
Application to Non-Porous Surfaces Horizontal Surfaces (isocyanurate
insulation) and Vertical Walls (Figures 9 & 10).

Figure 9

Figure 10

Fold the membrane back so that half of the sheet is exposed. Apply
0.12–0.15mm of adhesive to both surfaces and wait for it to turn transparent
and dry to a finger touch. The membrane can then be folded over the insulation
or up the wall. Broom or roll the membrane surface to ensure good contact
of the membrane to the substrate. Coverage rate is approximately 4 square

16
metres per kilogram can but may vary depending on the job site conditions.
Remove Water Based Bonding Adhesive from seam area with damp
cloth.

Application to One Porous Horizontal Surface (wood fibreboard, gypsum

board, plywood ,OSB)

Fold the membrane back so that half of the sheet is exposed. Apply
0.25–0.30mm of adhesive to the porous substrate only, with a roller.
Immediately lay the membrane into the adhesive while wet. If the adhesive
has turned transparent, a thin coat of adhesive must be applied to the
membrane. Laminating onto one surface while the adhesive is wet will
allow for some repositioning of the membrane prior to the adhesive
setting. Immediately broom or roll the membrane after it is laid into the
adhesive to ensure good contact. Coverage rate is approximately 4 square
metres per kilogram but may vary depending on job conditions. Remove Water
Based Bonding Adhesive from seam area with damp cloth (Figures 11, 12, &
13).

Figure 11

17
Figure 12

Figure 13

SEAMING MEMBRANE PANELS WITH

SEAM TAPE
After adhering the membrane sheets so that the width of the seam is the width of
the seam tape used, remove excess chalk from a chalk line by snapping the line
into the air and then chalk a line 13mm from the leading seam edge (Figure 14a).

18
Figure 14a

Fold the top sheet back to expose the seam area. (Hint: A small piece of
seam tape that is tacky on both sides is useful to tack the membrane back.)
If the EPDM membrane is contaminated with dirt, dust or debris, clean the
seam area with Membrane Cleaner on a cotton cloth before applying Seam
Tape Primer. Using the Scrub Pad, apply the Seam Tape Primer to the area
with back and forth strokes and moderate pressure until the seam surface
attains a smooth black appearance. Apply the Seam Tape Primer past the
seam edge to the chalk line. Allow the primer to dry (Figure 14b).
Figure 14b

19
If Solvent Based Bonding Adhesive is in area to be seamed, apply duct tape
to adhesive covered membrane area and roll with hand roller. Peel off duct
tape. If adhesive remains repeat process. If is in area to be seamed, remove
with damp cloth.

Seam Tape comes in rolls of 76.2mm x 7.62 metres and 76.2mm x 30.48
metres.

Unroll the Seam Tape along the length of the seam, tape side down, aligning
the Seam Tape paper with the chalk line. Using moderate pressure, draw the
Scrub Pad or roller along the Seam Tape release paper. This will set the Seam
Tape into place and keep air from being trapped under the tape. Fold the top
membrane onto the Seam Tape release paper (Figure 14c).

Figure 14c

Reaching under the top ply of membrane, pull the release paper away from
the Seam Tape at a 45° angle to the seam. While removing the paper, draw
your hand across the seam, from the back to the leading edge. This will pre-
vent wrinkles and fish mouths from forming in the seam. After the paper is
removed, roll the entire length of the seam with a steel hand roller, first, across
the seam, and then the length of the seam.

20
IMPORTANT! If the Seam Tape does not visibly extend beyond the leading
seam edge, the edge (Figure 14d) should be cleaned with Membrane Cleaner
and caulked with Lap Caulk.

Figure 14d

Note: When splicing Seam Tape, overlap each piece a minimum of 25mm
and firmly roll with a steel hand roller.

SPLICING AND SEAMING WITH RUBBER

TO RUBBER ADHESIVE (SEAM TAPE IS
RECOMMENDED WHERE POSSIBLE)
Fold the top ply of the seam back to expose the 152.4mm area to be seamed.
Remove any bonding adhesive as noted in the previous section. Using a clean
cotton rag, clean both surfaces at the splice area with Membrane Cleaner at
a maximum rate of 30.96 metres per 3.785 litre container (Figure 15a). Be
sure to clean a minimum of 25mm past the leading edge of the finished seam
(Figures 15b and c).

When cleaning the seam area, change the rags frequently. Do not allow the
rags to become loaded with talc or other contaminants from the membrane.

21
Figure 15a

Figure 15b

Figure 15c

22
WARNING: Membrane cleaner is extremely flammable!! Use UL Approved
containers.

Rubber to Rubber Adhesive should be applied at a maximum rate of

36.6–42.7 metres per 3.785 litre container (0.2–0.25mm thick when dry).
Allow the Rubber to Rubber Adhesive to dry to the finger touch (tacky not
stringy).

IMPORTANT: When cleaning and applying rubber to rubber adhesive to

the seam area, be sure to extend both procedures past the leading edge of
the finished seam.

Starting in the middle of the seam, fold the top ply onto the bottom ply,
working from the middle to the ends of the seam. Make sure to avoid wrinkles
and fish mouths. Using a steel hand roller, roll the entire length of the seam
from the middle toward the ends of the seam, then rolling parallel with the
seam.

Clean the seam edge with Membrane Cleaner and apply a 6.35mm bead of
Lap Caulk centred over the seam edge. Make sure the caulk covers both the
upper and lower parts of the seam membrane.

Note: Applying Lap Caulk should be the last application procedure. It is advis-
able to wait at least 4 hours after completing the seaming procedure before
application. Applying Lap Caulk before the seams cure might cause the seam
edge to distort and pucker.

ALTERNATIVE PANEL LAYOUT

AND SEAMING
The following seaming technique is acceptable for only fully adhered roofs.

Lay roof panels out with at least a 51mm overlap. Fully adhere roof as instructed
earlier. After the roof is adhered, use a straight edge and utility knife to cut
through both layers of membrane in the area where the panels are overlapped.
Remove the end cuts from both panels. This procedure creates a perfect butt
splice in the same manner as a wall paper hanger would (Figure 15d).

Using a Scrub Pad and Seam Tape Primer prime an area 102mm on either
side of the butt splice. Centre 152.4mm Cured Cover With Tape over the butt
splice and unroll while removing the backing paper. Roll the cover strip with

23
Figure 15d

a steel hand roller, first rolling the length of the seam and then across the
seam (Figure 15e).

Figure 15e

PERIMETER WALLS & INSIDE CORNERS

Stick the field sheet to the substrate until the membrane reaches the wall. Apply
solvent Bonding Adhesive to the folded membrane and the wall area. Starting
at the base or angle change between the corner and opposite end of each
wall, begin to roll the EPDM sheet up and along the wall to form a wall flashing.
Roll the excess EPDM material towards the corner. Take care to thoroughly
stick the membrane into the angle change before rolling the membrane up the
walls. Broom or hand rub the flashings to ensure 100% adhesion (Figure 16).

24
Figure 16

Note: Wall Flashings should extend a minimum of 305mm above the roof deck.
When one side is flashed in, (A), begin the other side, (B). When both walls
are flashed in, all excess material should form a pocket in the corner.
Clean the inside and outside of the pocket with Membrane Cleaner and apply
Rubber to Rubber Adhesive to both sides of the pocket. Allow the adhesive
to dry, tacky to the touch but not stringy (Figure 17).

Figure 17

Note: It is important to bond the wall flashing on each side of the corner as
tightly into the corner as possible.
Starting at the base of the inside corner pocket, press the two glued surfaces
together. Following standard seaming procedures attach the pocket to either

25
wall (see Figure 12). Install a 152.4mm Cured Cover Strip with Tape extending
from the bottom of the pocket fold to the top (see Figure 23) (Figure 18).

Figure 18

OUTSIDE CORNER FINISH DETAIL

1. Prior to installing any flashings, use the Rubberall® Scrub Pad and apply
Seam Tape Primer to all areas to be flashed. Cut Uncured Flashing with
Tape 152.4mm wide by 203.2mm long. Cut the corners round to prevent
inadvertent peeling. After the Primer has dried, fold one end of the flashing
25mm from the end. Place the membrane against the vertical surface so
that half the flashing is on either side of the corner. Fold the flashing around
the corner and adhere to the vertical surface. The flashing should extend
50.8mm onto the roof deck, and 152.4mm up the vertical (Figures 19a, b,
and c).
Figure 19a

26
Figure 19b

Figure 19 c

Uncured Flashing with Tape comes in Patches (305 x 305mm) and rolls
(305mm x 7.62 metres or 152.4mm x 30.48 metres).
2. Bond the flashing at each corner and stretch the middle away from corner
as the flashing is mated to the field membrane.

IMPORTANT: All stretching should be done in the middle of the flashing.

3. The second layer of Uncured Flashing with Tape should be installed
following the same flashing procedures as the first, but using 305mm x

27
 305mm Uncured Flashing with Tape (see Figure 19c). This flashing should
extend onto the roof a minimum of 102mm and up the vertical wall a
minimum of 204mm.
4. If it is necessary to add flashing membrane to attain a taller flashing detail,
cut the field membrane to the desired dimensions and adhere the new
membrane over the previously installed membrane and flashing details
using Rubber to Rubber Adhesive.

IMPORTANT: Always extend the new flashings above any existing mem-
branes or flashing materials.

COVER STRIP
Where a protrusion in the roof, such as a pipe or curb opening, was encoun-
tered while installing the EPDM membrane, the membrane was cut to the
nearest edge to allow easy layout of the membrane. After the field sheet has
been glued and brushed into place, apply a 152.4mm wide Cured Cover Strip
over the entire cut in the field sheet from the pipe to the end of the sheet,
prior to pipe boot installation (Figure 20).
Figure 20

Peel and Stick Pipe Boot

1. Select the proper size of Multi-Diameter Peel and Stick Pipe Boot and cut
the pipe boot above the thick index ring. Do not cut diagonally thru the
index ring. The pipe boot should fit snugly over the pipe.
2. Install the pipe boot over the pipe and turn the boot inside out exposing
the bottom of the boot flange. Apply Seam Tape Primer at least 254mm in
all directions from the pipe. Remove seam tape release paper from the
pipe boot. Pull the pipe boot down and adhere it to the field membrane
(see Figure 15). Roll adhesive area with a steel roller.

28
3. Pull the top of the pipe boot back and apply Water Cut-Off Mastic between
the pipe and boot. Bring the boot back into position and remove any excess
Water Cut-Off Mastic. Install a stainless steel adjustable clamp ring over
the pipe boot. Apply Lap Caulk around the top of the boot (Figure 21).

Figure 21

PIPE OR CONDUIT FLASHINGS USING

UNCURED FLASHING WITH TAPE
When a pipe or conduit is encountered that cannot be flashed with a Peel
and Stick Pipe Boot, the protrusion must be flashed using 2-plys of Uncured
Flashing with Tape.
1. Make sure to clean the protrusion and remove and loose flashings. Using
the Scrub Pad, apply Seam Tape Primer around the protrusion.
2. Cutting from Uncured Flashing with Tape, install a 152.4mm wide piece
extending 102mm up the protrusion and 51mm onto the roof deck. Wrap
the entire protrusion, allowing a 51mm overlap of each flashing. Use as
many pieces as necessary to flash the pipe.
3. After the first ply is completed, install the second ply using 305mm of
Uncured Flashing with Tape. Wrap the protrusion with 204mm of Uncured
Flashing with Tape extending up the protrusion, and 102mm onto the roof
deck. Make sure to stagger the end laps of the Uncured Flashing with Tape
so that one lap is not directly over another. Use as many pieces as
necessary to complete the flashing detail.
Note: It is recommended to extend the flashings above the roof deck a
minimum of 204mm. Wrap the entire protrusion with another ply of Uncured
Flashing with Tape to attain the desired height. Make sure to overlap the
top of the prior ply a minimum of 51mm.

29
Always extend the new EPDM flashings above any old flashings that may
remain on the protrusion. Clean and apply Lap Caulk to the flashings. Do not
install a Pipe Boot Clamp over Uncured Flashing with Tape (Figure 22).

Figure 22

WALL TERMINATION
Always extend the membrane up the wall a minimum of 305mm. When using
wood shakes, or other siding materials, a Termination Bar is not required if
the siding material is brought down at least 204mm below the top of the
EPDM sheet. All siding must be kept a minimum of 102mm above the roof
deck.

Determine the height of the finished wall flashing (305mm height or less if job
conditions won’t allow) and the placement of the aluminium Termination Bar.
Chalk a line at this level. Peel the top of the wall flashing from the wall to the
chalk line and apply a heavy bead of Water Cut-Off Mastic between the EPDM
and wall. The mastic should be applied so that the final position of the Ter-
mination Bar will be directly over the Water Cut-Off Mastic.

Fasten the Termination Bar with nylon/metal anchor pins, or aluminium sheet
metal screws. Install a fastener in every pre-drilled hole. Remove excess mem-
brane that extends above the Termination Bar and apply Lap Caulk to the top
of the Bar (Figure 23).

30
Figure 23

Termination bar comes in 3.048 metre lengths.

T-JOINTS
A T-Joint is formed when two sheets of cured EPDM form a seam that travels
under, or over, a third ply. The centre of the “T” is where the middle sheet
ends and the top sheet bridges over the middle sheet. This T-Joint can provide
an opportunity for water to seep under the membrane. To avoid this problem
a T-Joint patch should be installed as follows:

1. Clean the membrane with Membrane Cleaner.

2. Prime the area at least 102mm in all directions from the T-Joint.
3. Cut a piece of Uncured Flashing with Tape 76mm larger than the T-Joint(s)
and round corners. A single T-Joint patch can be made large enough to
accommodate more than one T-Joint (see Figure 24b).
4. Remove backing, place over T-Joint and roll with hand roller.

Figure 24 – Areas where T-Joint patches are required:

IMPORTANT: Only Uncured Flashing with Tape, cut to size, should be used
for T-Joint patch. All T-Joint patches should be thoroughly rolled with a steel
hand roller.

31
Figure 24a Where a field seam travels under a wall flashing.

Figure 24b Where a cover strip travels under a pipe boot or other flashing.

Figure 24c Where a horizontal seam will lap over, or traverse a vertical seam.

32
FIELD SEAM RADICAL BEND
Where a field seam makes a radical bend (turns up a wall or down over a
perimeter edge), a 152.4mm wide by 305mm long piece of Uncured Flashing
with Tape should be fixed over the seam. Round the corners of the Uncured
Flashing with Tape to prevent accidental peeling. Following standard flashing
procedures, install the flashing so that half of the flashing is on either side of
the radical bend (Figure 25).

When splicing two pieces of Cured Cover Strip with Tape, allow for a minimum
lap of 102mm. After properly rolling the entuire Cover Strip, install a 152.4mm
Uncured Flashing with Tape over any T-Joints.

ONE PIECE DRAIN SLEEVE

Drain Sleeve Inserts are used when the existing drain does not have a clamping
ring assembly, or cannot be taken up, properly cleaned and incorporated into
the new roofing system.

Note: Before beginning the re-roof project, thoroughly clean the existing drain.
Do not allow debris to clog the drain pipe. The new Drain Sleeve Insert should
be lower than the new roof system surface.

Install the field membrane over the drain. Cut a circle the size of the Drain
Sleeve Pipe directly over the existing drain. Following the standard seaming

33
procedure, clean the field membrane and Drain Sleeve Insert with Membrane
Cleaner. Apply Rubber to Rubber Adhesive to the field membrane and the
bottom of the drain inserts. After the adhesives have flashed off, apply a heavy
bead of Water Cut-Off Mastic above each back up ring and at the angle
change of the drain bowl. Insert the drain sleeve into the existing drain. If it
is necessary to mechanically faster the Drain Sleeve, use the proper length
deck screws with 50.8mm or 7.62mm plates.

After the Drain Sleeve Insert has been installed, using standard seaming
procedures, install a “target patch” to extend 152.4mm on all sides, past the
edge of the Drain Sleeve Insert. Cut the target hole 25.4mm larger than
the strainer securing ring.

Clean all seam edges with Membrane Cleaner and apply a 6.35mm bead of
Lap Caulk. Insert the strainer ring into the drain bowl and install the strainer
(Figure 26).

Figure 26

34
DRAINS WITH CLAMPING RINGS
If the existing drain has a clamping ring assembly, remove the strainer, clamp-
ing ring bolts and clamping ring. Clean the drain bowl, clamping ring flange
and clamping ring. Do not allow debris to clog drain pipe.

Install the field membrane over the drain. To determine where to cut the hole,
place the drain clamping ring over the membrane onto the clamping ring
flange. Allow the membrane to extend 25.4mm past the clamping ring.

After the membrane has been cut, lift the membrane and apply several heavy
beads of Water Cut-Off Mastic to the clamping ring flange. It is recommended
to use a minimum of ½ tube per drain.

Align the clamping ring over the membrane and punch holes where necessary
to install the clamping ring bolts. Do not cut the membrane back to the bolts.
Secure the clamping ring and install the strainer (Figure 27).

Figure 27

PITCH POCKETS
When installing a metal Pitch Pocket on a reroof project, always install a
wooden nailer around the protrusion. The nailer should be wider than the base

35
flange of the Pitch Pocket, and the same thickness as the retrofit or insulation
board. Remove any foam insulation wrap to a point above the Pourable Sealer
line. To ensure the Pourable Sealer will adhere to the protrusions, clean and
apply Rubber to Rubber Adhesive to the protrusion, extending above the
Pourable Sealer line.

Bond the membrane up to and around the protrusion. Apply a bead of Water
Cut-Off Mastic to the bottom of the Pitch Pocket and secure it to the nailer.

Flash-in the Pitch Pocket using Cured and Uncured membrane or flashing,
securing the material past the top of the Pitch Pocket into the inside of the
Pocket. Thoroughly mix the Pourable Sealer and fill the Pitch Pocket. Allow
for the slope of the Pourable Sealer from the protrusion to the Pitch Pocket
(Figures 28a and b).

Figure 28a New Construction

Figure 28b Reroof

36
PROTECTING RUBBERALL® MEMBRANE
IN HIGH FOOT TRAFFIC AREAS (DECKS)
IMPORTANT: The EPDM Membrane is not designed as a final walking
surface and should be protected from excessive foot traffic. The following
are options to be considered:

Covering with Walkway Pads

Rubberall® Walkway Pads (Peel & Stick) are 762 x 762mm skid resistant,
moulded EPDM pads that can be adhered to the membrane in much the
same manner as laying tile:
l Clean the membrane with Membrane Cleaner if it is heavily soiled.
l Lay the pad in place and mark the area where the membrane will contact
the tape. Leave 6.35mm gap between pads for drainage.
l Remove the walkway pad and apply Seam Tape Primer to the area where
the tape will contact the membrane using a Rubberall® Scrub Pad.
l Peel the backing paper from the tape and place the pad into position. Apply
heavy hand pressure or use a roller to ensure the tape is secured to the
membrane (Figure 29).

Figure 29

37
You may also use rubber to rubber adhesive over the entire Walkway Pad and
membrane to fully adhere. Refer back to section on rubber to rubber adhesion
for more information.

Covering With Wood Deck

When installing a wood deck over an EPDM membrane, the deck sleepers
should be laid over an extra piece of membrane called a separator sheet. The
separator sheet should extend a minimum of 51mm past the sleeper on all
sides and should be adhered with Seam Tape (Figure 30).
Figure 30

Do not attach the sleepers through the membrane. The deck should be
secured at a side wall, post, or perimeter area.

Covering With Exterior Grade Carpet

When attaching an outdoor carpet, use any exterior grade adhesive and install
according to carpet manufacturer’s instructions.

QUICKTRIM®
Plytech Quicktrim®
Plytech developed and manufacture the original flat roofing edge trim, Quick-
trim®, which was designed for the EPDM flat roofing market and has been
successfully used with other flat roofing membranes, such as TPO.

There are three basic components in the Quicktrim® range:

38
Check Kerb Trim – designed to secure the edge of the waterproof membrane
and stop the water going over the roof edge. Supplied in 2.5 metre lengths.
Drip Edge Trim – designed to firmly secure the membrane over the edge of
the roof and allow the water to flow over the trim, into a gutter. Supplied in
2.5 metre lengths.
Quicktrim® Corners – designed to give a neat roof edge detail when a gutter
or kerb extends continually around the roof edge
Components are manufactured from environmentally friendly, recyclable poly-
styrene materials and packs contain all the fixing pins and jointing clips
required for installation.

Installing Quicktrim®
Quicktrim® installation is simple; there are just 5 basic steps:
1. Fix batten
2. Fix back Drip Edge trim
3. Fix Corners
4. Fix Check Kerb trim
5. Fix front Drip Edge trim

Step 1
Before laying the waterproof membrane, fix a planed timber batten (approx.
size 25mm x 50mm) around the roof perimeter, level with the top of the roof
deck. We recommend the bottom of the batten is painted both for better
appearance and to protect the timber.

Step 2
Drip Edge Trim (back)
Fix the back Drip Edge trim onto the batten adjacent to the gutter using the
flat headed nails provided. Make sure the curved top section of the back edge
trim is level, or just below the top of the batten. Apply the waterproof mem-
brane over the roof and cut off any surplus at the bottom edge of the batten
or the bottom edge of the back drip edge trim (Figure 31).
Cut and fold the membrane flat around the roof corners when installing thin
single ply membranes. When using thick felt membranes avoid overlaps, keep
the corner flat and waterproof. This allows the corner trim to fit snugly against
the corner of the roof.

39
Figure 31. Drip edge trim – back.

Step 3
Quicktrim® Corner Installation
Corners should be installed onto the flat roof before installing the lengths of
trim. They are available in both external and internal designs.

Extend the membrane over the edge of the roof to fully cover the back edge
detail approximately 80mm. Cut & seal or fold the membrane around the roof
edge (with no steps or bulges) and slide the trim down onto the membrane
compressing the foam seal onto the roof (Figures 32 and 33).

Figure 32. Check kerb to check kerb.

40
Figure 33. Drip edge to drip edge.

Drill a 2mm pilot hole into the back trim section through the holes in the front
section and gently hammer the fixings through the pre-drilled holes. Do not
over tighten the fixing nails against the trim face.

Check to Drip Trim Corner Detail

Cut back the Check Kerb corner that meets the Drip Edge trim by 65mm and
install the corner onto the roof as described above and fix into place using
the flat headed brass coloured nail through the fixing hole on the cut down
section. Fix the black headed nail through the hole on the Check Kerb side
and then fix the clip as described above. Apply a black MS sealant to the end
of the Check Kerb corner flush with the clip edge (Figure 34).
Figure 34 Check kerb to drip edge.

41
Step 4
Check Kerb Trim
Butt the first trim up to a corner section, compressing both seals together.
On very cold days allow a minimum expansion gap of 5mm between the trims.
Then gently hammer the fixing pins through the centre of fixing slots.

Apply a bead of sealant to one side of the joint to hold the Check Kerb joint
clip in place. Apply the joint clip by hooking it under the bottom edge of the
trim and at the same time snap the top of the clip over the top section of the
Check Kerb (Figure 35).

Step 5
Drip Edge Gutter Trim
Fix the front Drip Edge trim over the membrane by firmly pushing down on
the trim to compress the seal and at the same time drill a 2mm pilot hole
through the front trim slot, into the back trim. Now pin through both trims
using the fixing provided. The top section of the trim should now be level or
just below the level of the roof to allow the water to pass over it and into the
gutter. Finally fix the joint clips (Figure 35).

Figure 35

42
Fixing the Clips over Trim Joints
Apply a bead of MS sealant to one side of the joint. Apply the joint clip by
hooking it under the bottom edge of the trim and at the same time snap the
top of the clip over the top section of the trims and over the sealant. This will
keep the clip in place and allow for thermal movement behind the clip.

HELPFUL TIPS
Use a sharp saw to cut the trims down to size.

Drill trims with a 5mm long slot if further fixings are required.

Always make sure two rubber seals are between the joints.

To insert a trim between corners measure between the corners or trims and
deduct 10mm.

Slight marks on the trims can be removed using CIF cream cleaner and a soft
cloth.

On very cold days allow a minimum expansion gap of 5mm between the trims.

Quicktrim® is environmentally friendly and is manufactured from partly recycled

polystyrene, which is again recycled.

43
REPAIR OF EPDM MEMBRANE
If your EPDM membrane is punctured, repairs can be made easily by:
1. Clean membrane with Membrane Cleaner
2. Prime area with Seam Tape Primer using Rubberall® Scrub Pad at least
102mm in all directions from puncture.
3. After the primer has flashed off, cut a piece of Cured Cover Strip with Tape
76.2mm larger than the puncture and round corners. Remove backing and
place over puncture.
4. Roll with hand roller.

APPLICATION REVIEW
1. Substrate
a. Plywood, OSB or high-density wood fibreboard
b. Concrete or brick.
c. Insulation boards – except polystyrene insulation.

2. Insulation
a. Insulation joints are butted together with no gaps.
b. Correct fastener pattern and quantity used.
c. 100% adhesion of the membrane to the substrate.

3. Field Seams
a. Seam Tape Primer should be visible past the leading edge of the field
seams (over scrub).
b. There are no wrinkles, voids or fish mouths in any portion of the field seams.
c. All angle changes in the field seams are flashed over with one ply of
152.4mm wide by 305mm long Uncured Flashing with Tape.
d. Seam Tape should extend past leading edge of seam. If not was Lap Caulk
used.

4. Flashing Details
a. No bridging occurring in the Uncured Flashing with Tape at any angle changes.
b. Two plies of Uncured Flashing with Tape are applied on all outside corners,
pipes (when not using a Pipe Boot) and stacks.

44
c. One ply of Uncured Flashing with Tape is applied at all T-Joints field seam
angle changes and over inside corner folds.
d. Seam Tape Primer is visible past leading edge of flashing (over scrub).

5. Termination Bar
a. Apply Water Cut-Off Mastic behind membrane prior to installing the
Termination Bar.
b. Install a fastener in every hole and maintain a 6.35mm space between bars.
c. Termination Bar installed on parapet walls a minimum of 305mm above the
roof deck.
d. Lap Caulk applied over top of Termination Bar.

6. Penetrations
a. Uncured Flashing with Tape is applied in two layers a minimum of 204mm
above the roof deck.
b. Peel and Stick Pipe Boots have Water Cut-Off Mastic applied between the
pipe and the boot, are terminated with a Pipe Boot Clamp and are caulked
with Lap Caulk.

7. Metal Edging
a. Metal Edge is prepared, cleaned and sanded and of sufficient gauge and
adequately fastened to withstand wind uplift.
b. Properly stripped in using 152.4mm wide Cured Cover Strip with Tape. Cover
Strip with Tape should extend a minimum of 50mm beyond any fastener.

8. Overall Appearance
a. Termination Bars are level.
b. Seam widths are uniform and completely rolled in.
c. All trash or debris is removed from job site.

Overall appearance is very important.

45
FREQUENTLY ASKED QUESTIONS
Q – Why do bubbles or wrinkles form after the membrane is fastened?
A – Solvents in the adhesives, which are not allowed to “flash off” or evap-
orate, cause distortions or bubbles. The wet adhesive distresses the mem-
brane causing wrinkles. Depending on the substrate and the amount of wet
adhesive, bubbles or distortions in the membrane will eventually be absorbed
by the membrane and disappear.

Q – Can the adhesive dry too long?

A – Yes. After the adhesive is applied and has flashed off, the surfaces should
be mated together. Allowing the prepared surfaces to remain open longer
than necessary risks contamination from dust and debris. High temperatures
as well as falling cool temperatures and moisture can affect the performance
of the adhesives if the prepared surfaces are left open too long.

Q – Can I put a deck over an EPDM roof?

A – Yes. See Figures 32 and 33 in this manual.

Q – Can I install outdoor carpet over an EPDM roof?

A – Yes. The best method is to fully attach the carpet using an exterior grade
carpet adhesive.

Q – Can I fasten EPDM to concrete or wood?

A – Yes. Both substrates should be free of splinters, burrs, loose fasteners,
sharp edges, dust and debris.

Q – Are there warranties for residential applications?

A – Yes. Rubberall® will furnish free Membrane Warranties for all registered
installations using 1.52mm and 1.14mm Rubberall® EPDM provided all acces-
sories (adhesives, seam tape, etc.) have been supplied by Plytech or their
distributor. Warranty duration is 30 and 20 years for 1.52mm and 1.14mm
respectively.

Q – What temperature is too cold for a successful installation?

A – Adhesives perform best at temperatures over 4.5°C. Below 4.5°C it is
best to install only on full sun days with low air moisture content. Application
may only be possible during the middle part of the day when the temperature
is stable and humidity is lowest. Rule of thumb . . . if it is comfortable to work,
you can install EPDM. It just takes longer for the adhesive to flash off.

46
Q – Can I use Rubberall® EPDM below grade?
A – Yes. Rubberall® EPDM can be used below grade as a waterproofing
membrane on basement walls and earth homes. It is important that the sub-
strate be free of burrs and sharp edges that could puncture the membrane.
Earth homes and sidewalls should have a barrier board between the mem-
brane and the backfill.

Q – Is Rubberall® EPDM Membrane safe to use in ponds with aquatic

life?
A – No, our new LSFR membrane is not suitable for aquatic life.

Q – Can I install Rubberall® EPDM over smooth surface asphalt or shingle

roofs?
A – Installing EPDM over old smooth surface asphalt or shingles is not
recommended. The adhesives used to bond the membrane will activate
“dead” asphalt and not bond properly. A retrofit or insulation board should
be installed over the old substrate.

Q – When I adhered the membrane, several wrinkles occurred. Will the

wrinkles affect the roof?
A – Although wrinkles are unsightly, unless they traverse a seam, they will not
leak. Large wrinkles can be cut out and patched. Small wrinkles might be
absorbed into the membrane as it goes through several expansion/contraction
cycles. Any wrinkles that migrate through a seam must be removed and
repaired.

Q – When should I use 1.14mm and when should I use 1.52mm EPDM
membrane?
A – 1.52mm membrane is recommended for roofing applications primarily for
ease of installation. 1.14mm membrane as a roofing membrane should only
be used by the experienced installer. Inexperienced installers will find that
they encounter wrinkles when bonding the membrane. Cutting these wrinkles
out take time and leaves a less pleasing roof appearance.

The 1.14mm EPDM membrane is the product of choice for below grade water-
proofing and also for many other uses around the home.

47
GLOSSARY
Bonding Adhesive: Bonding Adhesive used to fasten the field sheet to sub-
strate, walls and curbs. It should be thoroughly stirred before using. Adhesives
can be either Solvent Based or Water Based Bonding Adhesives.

Bridging: Occurs when the membrane is unsupported at a juncture or angle

change. Moisture condensing on the bottom of the membrane can cause
further de-lamination. Areas where bridging occurs should be repaired and
re-flashed.

Cured Cover Strip: 152.4mm wide cured EPDM membrane with butyl tape
laminated to one side. Used when stripping in metal drip edge, repairing cuts
in the field membrane or flashing that requires cured membrane.

Deck Plates And Screws: Used to mechanically attach the insulation board
to the roof deck.

EPDM Membrane: Cured field sheet membrane applied to roof decks, walls
and flashings. Available in a variety of widths and lengths.

Fish Mouth: A wrinkle is formed when an increasing amount of membrane is

forced onto an area too small to accommodate the material. When the wrinkle
ends at the edge of the material, a conical opening is formed called a Fish
Mouth. Wrinkles and Fish Mouths in seams are not acceptable. They must be
removed and flashed in.

Flash Off: Allowing the solvents in the adhesives or primer to evaporate, leav-
ing the material in a tacky, not wet or stringy condition, before mating the two
surfaces together. If the proper flash off time is not allowed, blisters will form
in the membrane. These will not harm the membrane and over time, will usually
disappear.

Lap Caulk: Applied at the top of all Termination Bars; at the top of Pipe Boots
after the Pipe Boot Clamp has been installed and to adhere shingle tabs
to the EPDM membrane. Lap Caulk must be used when Rubber to Rubber
Adhesive is used to bond two pieces of membrane.

Membrane Cleaner: Used for cleaning metal drip edge after it has been
sanded, prior to applying Rubber to Rubber Adhesive; cleaning seam edges
prior to applying Lap Caulk; cleaning excessively dirty membrane; splicing
membrane or inside and outside corner details.

48
Metal Drip Edge: Used to create a finished appearance and prevent water
from running down the surface of fascias and walls. Metal Drip Edge is made
from painted aluminium and galvanized or painted steel and is available at
local builders merchants.

Pipe Boot: Pre-moulded EPDM boot with tape: The best and most cost effec-
tive way to flash pipes.

Pipe Boot Clamp: Stainless steel clamp used to secure the top of the pipe
to the Pipe Boot.

Seam Tape: Butyl tape used to splice two layers of membrane into a water-
tight seam and is available in 76.2mm and 178mm widths.

Seam Tape Primer : Solvent based primer used to clean and prime the EPDM
membrane before applying Seam Tape or any cured or uncured tape backed
membrane. It is applied using a Scrub Pad. Do not apply primer directly to
tape. Primer is only applied to surfaces being prepared to accept tape prod-
ucts. Seam Tape Primer enhances the strength of membrane bonds using
Rubber to Rubber Adhesive.
Substrate: The surface on which the membrane is applied (brick, concrete
block, high-density wood fibreboard, plywood, OSB, isocyanurate insulation).
Note: The membrane should not be adhered directly to asphalt roofing,
shingles or polystyrene insulation.

T-Joint: A T-Joint is formed when two sheets of cured EPDM form a seam
that travels under, or over, a third ply. The centre of the “T” is where the
middle sheet ends and the top sheet bridges over the middle sheet.

Target Patch: A piece of membrane used to flash over a roof jack or pipe. A
Target Patch is always larger than the object it is flashing in, and is a cured
membrane. Note: Do not apply membrane directly to gas furnace stacks.

Termination Bar: Extruded aluminium bar used to terminate the membrane

at parapet walls, chimneys, skylights and AC curbs. It is also used to terminate
membrane fascia when no metal drip edge is used. The proper fastener should
be installed in every hole and a 6.35mm space maintained between bars.

Uncured Flashing With Tape: EPDM membrane that is not cured (meaning
it was not put in oven and baked in the manner of cured membrane) and is
used whenever the field sheet has to be cut to accommodate outside corners,
pipes, T-Joint patch and field seams making angle changes. After Uncured

49
Flashing with Tape is applied, it will cure in the position in which it was applied.
It should be applied using Seam Tape Primer.

Water Cut-Off Mastic: Used to create a waterproof compression gasket

whenever the membrane is mechanically fastened using a Termination Bar or
Pipe Boot Clamp. Water Cut-Off Mastic is applied between the membrane
and the pipe or wall. The mechanical termination is installed over the mem-
brane, compressing the mastic and creating the gasket.

50
RUBBERALL® ROOFING
MEMBRANE MATERIAL AND LABOUR
LIMITED WARRANTY
30 Years on 1.52mm membrane (Fully Adhered Roofing Installations Only)

20 Years on 1.14mm membrane (Fully Adhered Roofing Installations Only)

Full details of our warranty can be viewed at www.rubberall.com

WARRANTY REGISTRATION
You may register your warranty online at www.rubberall.com

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