PRODUCT DESCRIPTION

 

Fire-Retardant Cedar Shakes and Shingles

Steadfast No. 1 shingles and No.1 shakes are available pressure impregnated with fire-retardants and meet testing standards developed by Underwriters Laboratories and adopted by the National Fire Protection Association. May be used for Class C, B and A roof system.

.40 CCA Pressure Preservative Treated Cedar Shakes and Shingles

Steadfast shingles and shakes are warranted for 30 years by the treater and/or chemical company when .40 CCA pressure treated. This product is ideal in areas of high humidity where premature decay may occur.

---

 

GENERAL DESIGN DETAILS

 

Sheathing

Shingles and shakes shall be applied over spacing sheathing. Spaced sheathing is usually 1"x 4" (25.4 mm x 101.6 mm) or 1" X 6" (25.4 mm x 152.4 mm) 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 waferboard 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" (25.4 mm x 101.6 mm) boards to coincide with the weather exposure (Table 3, Page 23) of the shingles (Figure 1). Thus, if the shingles are to be laid at 5 1/2 (139.7 mm) to the weather, the sheathing boards would also be spaced at 5 1/2" (139.7 mm) on center. In this method of application each shingle is nailed to the center of the 1" x 4" (25.4 mm x 101.6 mm) board.