Ventilated Façade System - Technical Document
Rediwa CAT 7 System
Technical Department of Wandegar
Wandegar 2001 S.L. - P.I Mabesa Camí Foies Ferraes Nave 13.
Tel 964 363 721 Fax 964 386 720 C.P: 12110 L'Alcora (Castellón)
wandegar@wandegar2001.com
INTRODUCTION
A ventilated facade is defined as the exterior and the main facing of a building, so, it
insulates the perimeter from exterior environment. A ventilated façade is characterized
mainly because it is a enclosure with an air chamber, separated by two skins, the
internal one resolves the insulation and the sealing, and the external, whose main
mission is to create the air chamber, ensures a continuous ventilation all along the
surface of the façade. That permits insulation from cold in winter and warm in summer,
getting energy savings up to 30%. The external facing is open to be resolved with a lot
of materials: ceramic tiles, natural stone, phenolic panel, etc. The Rediwa CAT 7 system
has been specially designed to be used on thickness ceramic tile coating (maximum 7
mm).
TERMS OF USE
The Rediwa CAT 7 System described on the present document has been designed for
coating in ventilated facades by using a ceramic material with a thickness lower than
7mm fixed to a metallic substructure by using a chemical fixation. The installation of
this System must be carried out by WANDEGAR 2001 S.L. (onwards Wandegar) or
other installators recognized by the own company, doing possible the technical
assistance by Wandegar. Wandegar reserves the right to inspect the works executed by
using the system described on this document, whether or not have been executed by the
company.
The installation company must ensure that the system implementation work is carried
out under the conditions and fields described by the present Technical Document and
respecting the comments of the Technical Department of Wandegar.
TECHNICAL DOCUMENT
The present technical document has been written by the Technical Department of
Wandegar and specified in accordance with the current applicable regulations. The
metallic substructure of the system and their supporting wall fixings (vertical profiles
and anchors) are exactly the same as those described in the DIT 525/09 of the Institute
of Construction Science Eduardo Torroja. Wandegar extends the description of the
substructure described in the DIT to this document. The system was tested by the
DRAFT ETAG 034 - EOTA (European Organisation for Technical Approvals) in the
laboratories of APPLUS+ to load pressure and suction obtaining highly satisfactory
results.
L´Alcora (Castellón), 7th of July 2010
TECHNICAL DEPARMENT of WANDEGAR
TECHNICAL DOCUMENT OF VENTILATED FACADE SYSTEM
1. OBJECT
The ceramic fixing system Rediwa C.A.T 7
developed by Wandegar for slim ceramic tiles
(below 8mm thickness) as the one manufactured
by THE SIZE consists basically in a chemical-
elastic longitudinal fixing of the ceramic over
vertical profiles besides a mechanical support
where the tile weight rests.
2. PRINCIPLE AND SYSTEM
DESCRIPTION
The REDIWA CAT 7 system of ventilated façades
is composed by:
— Vertical “T” structure anchored on the
enclosure with brackets and other
necessary anchorage elements. The
distance among the vertical profiles will
be up to 60cm and there always will be
one of these profiles on the vertical joints
between tiles.
— Aluminium supports in “L” shape
lacquered in black and directly screwed to Figure: Rediwa CAT 7 system
the vertical profiles. These supports
receive the ceramic tile weight, releasing 3. COMPONENTS AND MATERIALS
the adhesive of this function.
— Elastic adhesive single composed putty, 3.1 Ceramics
with a permanent elasticity, high The system has been specially designed for slim
adhesiveness and mechanical resistance, ceramic tiles (below 8mm thickness).
fast polymeric action because the
ambient moisture action. The adhesive 3.2 Elastic adhesive MS WAN-FIX
putty fulfils with DIN 4102, type B2 fire PANELES
classification. - Elastic adhesive single composed putty,
with a permanent elasticity, high
— Double faced adhesive to initial fastening adhesiveness and mechanical resistance,
of the ceramic tiles while adhesive putty fast polymeric action because the ambient
polymerizes (about 24 hours). moisture action. The adhesive putty
Furthermore, this 3mm thickness fulfils with DIN 4102, type B2 fire
adhesive allows getting the same distance classification.
from the profile to the ceramic, so we o Adhesive Traction Resistance: 4
always get an equal plane. N/mm² (40 km/cm²)
o Adhesive Cut Resistance: 2’5
N/mm² (40 km/cm²)
o Adhesive Tear Resistance: 9
N/mm² (40 km/cm²)
o Tixotropy: Excellent. It doesn’t
take down
o Application Temperature: +5 to
+50ºC with no raining
3.3 Primer The geometric characteristics of most frequent use
Primary framework primed to improve the brackets are listed in following table:
Characteristics Wing length Wing length
adherence of the putty with a chemical product 70x50 90x60
made with alcohols and polyurethane resin. Weight (kg / m) 0,80 1,15
Color: Colorless. Area (mm2) 351 441
Solid Contents: 5% Perimeter (mm) 240 300
Inflammation point (DIN -14ºC Turning Radius Xc (mm) 22,68 29,37
51755): Turning Radius Yc (mm) 14,99 17,86
Solvents: Acetone, toluene, xylene Inertial Moment IXX(cm4) 18,05 38,04
Treatment of the Board: The surfaces should be dry, firm Inertial Moment Iyy (cm4) 7,88 14,07
and free of dust, mud, oil or
grease, etc. After cleaning with
ethanol is recommended.
Work Technique: Implement, preferably to brush, a
thin, continuous layer on the walls
of the Board previously treated,
leaving dry approximately an hour
before applying the sealant.
Drying time: Approximately 30 minutes at 23
ºc.
PRIMER C-29 It is flammable. Do not smoke or use unprotected
flame during its implementation. The work area must be well
ventilated.
PRIMER C-29 It is dangerous by inhalation. Avoid contact with
skin or eyes. Wear gloves, and before eating or smoking, wash Standard Bracket
your hands with an industrial detergent..
(Front elevation, side and section)
3.4 Double faced adhesive
Double faced adhesive to initial fastening of the
ceramic piece while the adhesive putty
polymerizes (about 24 hours). Furthermore, this
3mm thickness adhesive allows getting the same
distance from the profile to the ceramic, so we
always get an equal plane.
Corner Bracket
3.5 Structure (Front elevation, side and section)
Designation Detalle
3.5.1 Materials
All the aluminium profiles (vertical, “L” and “U”) Load Bracket 90 x
60 x 175
and the brackets are extruded in EN AW 6063
aluminium.
Physical and mechanical characteristics are listed
in the table: Retention Bracket
Density (kg/dm3) 2,70 90 x 60 x 110
Elastic Module (MPa) 69 500
Poisson Coefficient 0,33
Maximum allowed stress (MPa) ≥ 175
(4))
Elastic Limit Rp 0,2 (MPa) (4) ≥ 130
Elongation (%
(4) 8 Standard Bracket 80
Expansion Thermal Coefficient 23,6 .10-6 x 40 x 140
( K-1)
(20 a 100 ºC)
3.5.2 Brackets
Standard Bracket 80
Special aluminium pieces with “L” shape and x 40 x 100
3mm thickness fixed to the walls of the building to
connect the ventilated façade substructure with the
building’s framework. There are two kinds:
• Load, which are the responsible of supporting Load Bracket 70 x
and transmitting to the wall support the whole 50 x 150
weight and wind. These brackets are placed in the
building structural elements.
• Retention, its function is to support and pass the
wall support horizontal loads generated by the Retention Bracket
wind; they are placed on the wall support. 50 x 50 x 120
All the Brackets have a thickness of 3mm.
Standard Bracket
100 x 85 x 200
3.5.3 Vertical profiles 3.5.4 Anchors
Vertical structure anchored to the enclosure with the Anchorages used will be always in A2 or A4
brackets. The distance among the vertical profiles steel alloy:
will be up to 60cm and there always will be one of
these profiles on the vertical joints between tiles.
For special applications there are other vertical
profiles not standardized.
Characteristics Profile Profile T Profile Profile
40x40 60 x 80 45x 43 64x45
Weight (kg/m) 0,85 0,90 1,09 1,52
Area (mm2) 304 333,53 406,84 563,37
Minimum 1,5 2,5 3 3
thickness (mm)
Perimeter (mm) 160 320 469 571
Turning Radius 15,73 19,36 18,12 26,91
Xc (mm)
Turning Radius 15,73 17,13 20,91 20,63
Yc (mm)
Inertial Moment 5,71 11,50 13,37 23,97
IXX (cm4)
Inertial Moment 5,71 10,67 17,80 40,80
Iyy (cm4)
Profile
3.5.5 Load Anchors
40x40 The type, position and number of anchorages for
attaching the brackets to the wall support will be
calculated depending on the material of the wall
and the loads calculation. This will be reflected in
the technical project of the ventilated facade.
Profile T
60 x 80
Standard anchor
Profile 45x 43
4.SYSTEM PROCESS INSTALLATION
4.1 Primary framework installation
Vertical “T” structure anchored on the enclosure
with brackets and other necessary anchorage
elements. The distance among the vertical
profiles will be up to 60cm and there always will
be one of these profiles on the vertical joints.
Profile 64x45
4.2 “L” Profile installation
“L” profile installation that serves as a support to 4.5 Ceramic tile installation
the initial tiles on the bottom of the façade. This
horizontal profile also will serve to get the façade
perfect levelled.
4.3 Vertical profiles cleaning and
primering
The vertical profile cleaning is achieved using a
cloth to eliminate dust and aluminium chips. Later,
we primer these profiles to improve the adherence
of the putty.
L´Alcora (Castellón), 7th of July 2010,
4.4 Double faced adhesive and elastic-
adhesive putty application
MS WAN-FIX PANELES TECHNICAL DEPARMENT of WANDEGAR
Central vertical profile
Lateral vertical profile
MS WAN-FIX PANELES
Double Shield Adhesive
