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 These
shakes are sawn both sides. Premium and Number 1 Grades are the most
common. Premium Grade is 100% edge grain, 100% clear and 100%
heartwood. Number 1 Grade allows up to 20% flat grain in each bundle.
Number 2 and 3 Grades are also available.
Description
Nominal lengths 18" and 24" shakes shall be of random widths, minimum
width shall be 3 ½". Tapersawn shakes less than 4" in width shall not
constitute more than 5% of each bundle. Thickness shall be nominal 5/8"
or ¾" with a minus tolerance of 1/16" in 10% of the bundle. Face 100%
clear. Flat grain 205 maximum per bundle. 1/8" sapwood allowed to
exposure line. Additional sapwood permitted above that point.
Roof
Exposure
10" for 24-inch shake; 7½" for 18-inch shake. Interlaid felt is
required.
Wall
Exposure
Single course: 11½" for 24-inch shake; 8 ½" for 18-inch shake
Double course
18" for 24-inch shake; 14" for 18-inch shake.
Recommended Use
For walls or roofs on 4:12 slope and steeper where a high quality,
durable and uniform appearance is desired.
Starter-finish
Course
Length 15'. For use on the underlying starter course at eave lines and
for the final course at ridges where trimming would otherwise be
necessary and full-length shakes are not needed.
Description
Same as Number 1 Grade, except that all product shall be 100% edge
grain. All other descriptions from Number 1 Grade apply.
Description
Nominal lengths 18" and 24", minimum width shall be 3", shakes less
than 4" width shall not constitute more than 10% of the running inches
of each bundle. Thickness shall be nominal 5/8" or ¾": with a minus
tolerance of 1/16" in 10% of the bundle. Limited defects are allowed 9"
above the butt in 18" shakes and 12" above the butt in 24" shakes.
Unlimited flat grain is allowed. Sapwood is restricted it 1" in width
for the first 10 inches.
Roof
exposure
7½" for 24-inch shake; 5½" for 18-inch shake.
Wall
exposure
Single course: 10" for 24-inch shake; 7½" for 18-inch shake.
Double course
11½" for 24-inch shake; 8½" for 18-inch shake.
Recommended Use
For walls or roofs on 4:12 slope and steeper where a good quality
appearance is desired.
- Class
A, B & C fire ratings may be obtained by specifying
Certi-Guard®
pressure impregnated fire-retardant treated Premium or Number 1 Grade
shakes.
- Certi-Last® pressure
impregnated preservative treatment is available for added longevity.
- Contact
the treatment company for treatment warranty information, accessory
product requirements (including recommended fastener types) and
application details for treated cedar material.
- Certi-label™
cedar shake and shingle products are manufactured by members of the
Cedar Shake & Shingle Bureau are graded in accordance with UBC
Standards No. 15-3 and/or CSA 0118.1.
- 1997
ICBO Uniform Building Code requires No. 2 grade tapersawn shakes having
two thicknesses at the butt: 5/8" or ¾" with a minus tolerance of
1/16".
- This is only a product
description necessary for selection of materials and grades. For a new
roof construction manual and/or wall manual please contact: info@cedarbureau.com.
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