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7160 Beatty Drive, Mission, B.C., Canada V2V 6B4
P.O. Box 351 Sumas, WA, USA 98295
(604) 826-7185   (604) 462-8288    Toll-Free (800) 826-7185
sales@angloamericancedar.com

world suppliers of western red cedar shingles & shakes
 

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General Design Details

(go to General Application Details)

Sheathing

Shingles and shakes shall be applied over spaced sheathing. Spaced sheathing is usually 1" x 4" of 1" x 6" softwood boards.

Solid sheathing is acceptable and may be required in seismic regions or under treated shakes and shingles. It is recommended on shake applications in areas where wind-driven snow is common. Solid sheathing is usually wafer-board panels or plywood which provides a smooth base for roofing.

Shingles

There are two acceptable methods for application of spaced sheathing. One is to space 1" x 4" boards to coincide with the weather exposure of the shingles (Figure 1). Thus, if the shingles are to be laid at 5½" to the weather, the sheathing boards would also be spaced at 5½" on center. In this method of application each shingle is nailed to the center of the 1" x 4" board. In the second method of application, where 1" x 6" boards are used, two courses of shingles are nailed to each 1" x 6" board. (Figure 2) up to and including 5½" weather exposure. Although not commonly used, breather-type underlayment, such as roofing felt, may be applied over either solid or spaced sheathing.

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Shakes

In shake application spaced sheathing is usually 1" x 6" boards spaced on centers equal to the weather exposure at which the shakes are to be laid - but never more than 7½" for 18" shakes and 10" for 24" shakes on roof installations. When 1" x 4" spaced sheathing is installed at 10" on center, additional 1" x 4" boards must be installed between the sheathing boards, A solid deck is recommended in areas where wind-driven snow is encountered.cedar, cedar roof, cedar broker, cedar shingles, Tapersawn shakes, side wall shakes, Western Red Cedar, Cedar shingles, Cedar shakes, cedar roofing, cedar, cedar, cedar shakes, cedar roofing, cedar roof, cedar shingles, cedar side wall

 

 

 

 

 

 

Roofing felt interlay between the shake courses is required whether the sheathing is spaced or solid. The felt interlay acts as a baffle that prevents wind-driven snow or other foreign material from entering the attic cavity during extreme weather conditions. The interlays also increase the roof's insulation value.

Special care should be taken when installing the felt interlays over spaced sheathing to ensure that an effective baffle is formed (Figure 3). The felt should be applied over the top portion of the shakes and extend on to the spaced sheathing so that the bottom edge of the felt is positioned at a distance above the butt equal to twice the weather exposure. To be an effective baffle, the top of the felt must rest on the sheathing. The shakes should be placed so that the nails are driven through the upper portion of the sheathing board with the top of the roofing felt attached to the lower portion

 

 


Anglo American Cedar Products Ltd.
7160 Beatty Drive, Mission, BC   V2V 6B4   Canada
Tel: 604.826.7185    604.462.8288    800,826.7185
Fax: 604. 826.8594   
sales@angloamericancedar.com

Copyright ©  2014 Anglo American Cedar Products Ltd.
All Rights Reserved
 

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