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11jg0007 - MPB Bldg.

The document outlines requirements for roof decks when installing asphalt shingles, including that decks must be solidly sheathed with minimum 3/8 inch plywood or 7/16 inch OSB and spaced no more than 1/4 inch, or constructed of minimum 6 inch wide 3/4 inch thick boards spaced 1/4 inch or less. Roof decks must be clean, dry and free of debris prior to underlayment or shingle installation.

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129 views2 pages

11jg0007 - MPB Bldg.

The document outlines requirements for roof decks when installing asphalt shingles, including that decks must be solidly sheathed with minimum 3/8 inch plywood or 7/16 inch OSB and spaced no more than 1/4 inch, or constructed of minimum 6 inch wide 3/4 inch thick boards spaced 1/4 inch or less. Roof decks must be clean, dry and free of debris prior to underlayment or shingle installation.

Uploaded by

MewnEProwt
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© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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ROOF DECK REQUIREMENTS FOR INSTALLATION

OF ASPHALT SHINGLES

Technical Bulletin TB-07 September 20, 2017

Issue Description:
Requirements for roof decks on which Owens Corning asphalt shingles will be installed, including limitations
over spaced sheathing or deck boards.

Recommendations:
Owens Corning™ Roofing requires all asphalt shingles to be installed in the following manner:

• Solidly-sheathed roof decks:


o Minimum 3/8-inch plywood sheathing, rated by The Engineered Wood Association (APA).1
o Minimum 7/16-inch Oriented Strand Board (OSB), rated by The Engineered Wood Association
(APA).1
o Installed with minimum 1/8-inch and maximum 1/4-inch spacing at all panel edge and end joints.
Sheathing thickness and installation must follow the sheathing manufacturer and local building
code requirements.

• Decks constructed with spaced deck boards:


o Minimum 6 inch wide
o Minimum 3/4-inch thick
o Installed with maximum 1/4-inch spacing between boards

All roof deck surfaces, regardless of type, should be clean, dry, and free of debris, protrusions, dust and oil
prior to the installation of underlayment or asphalt shingles. Owens Corning asphalt shingles should never be
installed directly over insulation board of any type.

1
The Engineered Wood Association (APA) (formerly the American Plywood Association)
(http://www.apawood.org)

Please contact 419-248-6557 for additional information. Email: gettech@owenscorning.com

OWENS CORNING SCIENCE AND TECHNOLOGY, LLC


Disclaimer of Liability ONE OWENS CORNING PARKWAY
Technical information contained herein is furnished without charge TOLEDO, OHIO 43659
or obligation and is given and accepted at recipient’s sole risk.
1-800-GET-PINK®
Because conditions of use may vary and are beyond our control, www.owenscorning.com
Owens Corning makes no representation about, and is not
Pub. No. 10022499. Printed in U.S.A. July 2014. THE PINK PANTHER™ & ©1964-2014
responsible or liable for the accuracy or reliability of data
Metro-Goldwyn-Mayer Studios Inc. All Rights Reserved. The color PINK is a registered
associated with particular uses of any product described herein.
trademark of Owens Corning. ©2014 Owens Corning. All Rights Reserved.

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