2000 by the National Roofing Contractors Association. No

Information on Section 5: Wood Shakes and Shingles
General Information
Section 5: Wood Shakes and Shingles in the 2000
edition of NRCA’s Steep-Slope Roofing Materials
Guide is a comprehensive listing of wood shake and
shingle products commonly used in steep-slope
roofing.
Wood roofing products are generally separated into two
categories: cedar shakes and shingles, and wood fiber
panels.
Shakes and shingles are manufactured from western
red cedar, cypress, pine and redwood trees. Wood
shingles are sawn on both sides and have an even
taper and uniform thickness. The industry terms
Perfection and Royal, when applied to shingles, mean
nothing more that 18-inch (460 mm) and 24-inch (610
mm), respectively. Shakes are split from logs and
reshaped by manufacturers for commercial use. They
are thicker at the butt end than shingles; generally one
or both surfaces are split in order to obtain a textured
effect. The split and resawn shake has a split face and
sawn back. The taper-sawn shake has a natural taper
and is sawn on both sides. Cedar shakes and shingles
are available pressure treated with fire retardants and
chemical preservatives, for increased fire protection
and to prevent premature rot and decay in some
climates. Cedar shakes and shingles are installed over
both spaced and solid sheathing and mechanically
fastened. Shakes are installed using felt interlays that
act as baffles against wind-driven material and increase
insulating values.
Pine shakes are made from southern yellow pine and
are taper-sawn. They are also available pressuretreated
with preservatives to protect against decay and
insects. They may be installed over spaced or solid
sheathing and are mechanically fastened. Interlayment
felts are required.
The category of wood fiber covers those products
made of wood fibers, bonded together under heat and
pressure to form shakes or shingles. Because of the
size of the components, they are classified as panels
rather than individual shakes or shingles. They are
mechanically fastened over spaced or solid sheathing.
Specific Information Included in the Guide
Specific listing information for wood shake and shingle
products is as follows:
1. Company name
2. Product name
3. Wood species
4. Product style and size
5. Availability
6. Dimensions and coverage
7. Hip/ridge pieces available
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8. Slope and underlayment/interlayment
recommendations
9. Recommended decks
10. Year product first sold
11. Number of squares installed
12. Distribution
13. Fire ratings
14. Accepted by the following codes
15. Sales and technical information contacts
Additional information regarding wood shake and
shingle roof systems is provided in The NRCA Steep
Roofing Manual and The NRCA Roofing and
Waterproofing Manual.