CEDAR SHAKES

MEDIUM SHAKES

HEAVY SHAKES

TAPERSAWN SHAKES

Certi-Label Cedar Shakes

Certi-Split Hand-Split Shakes
These shakes have split faces and sawn backs. Cedar logs are first cut into desired lengths. Blanks or boards of proper thickness are split and then run diagonally through a band saw to produce two tapered shakes from each blank. Available in Premium Grade (100% edge grain) or Number 1 Grade (Up to 20% flat grain allowed in each bundle).

Certi-Sawn Tapersawn Shakes
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.

Certi-Split Straight-Split Shakes
Produced by machine or in the same manner as tapersplit shakes except that by splitting from the same end of the block, the shakes acquire the same thickness throughout. Premium Grade only. (100% edge grain)

SHAKE SAMPLES

These shakes have split faces and sawn backs. Cedar logs are first cut into desired lengths. Blanks or boards of proper thickness are split and then run diagonally through a band saw to produce two tapered shakes from each blank. Available in Premium Grade (100% edge grain) or Number 1 Grade (Up to 20% flat grain allowed in each bundle).

Number 1 Grade
Description
Lengths 18-inch, thickness ½” (medium) and ¾” (heavy) minimums; length 24-inch, thickness 3/8″, ½” (medium) and ¾” (heavy) minimums. Width 4″ minimum. Clear heartwood; 20% maximum flat grain in each bundle.

Roof Exposure
18-inch shakes – 7½” maximum; 24-inch medium and heavy shakes – 10″ maximum; 24-inch (3/8″) shakes – 7½” maximum (5″ per UBC).

Wall Exposure

Single course: 8″ for 18-inch shake; 10½” for 24-inch shake.

Double Course
14″ for 18-inch shake; 18″ for 24-inch shake.

Recommended Use
For walls and roofs on 4:12 pitch and steeper where high quality appearance and performance are desired.

Premium Grade
Description
Lengths 18-inch and 24-inch; width 4″ minimum, thickness ½” (medium) and ¾” (heavy). Clear heartwood; 100% edge grain; no defects

Roof Exposure
7½” for 18-inch shakes; 10″ for 24-inch shakes.

Wall Exposure
Single course: 8″ for 18-inch shakes; 18″ for 24-inch shakes.

Recommended Use
For walls and roofs 4:12 pitch and steeper and where a premium quality product is needed or desired. The 100% edge grain requirement exceeds the national industry standard.

  • 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.
  • Historical Projects: CSSB members offer straight split/barn shake, and tapersplit products for historic accuracy. Ask your supplier for more details. Check CSSB technical manual for specific installation details.
  • Certi-labelâ„¢ cedar shake and shingle products manufactured by members of the Cedar Shake & Shingle Bureau are graded in accordance with UBC Standards No. 15-3 and/or CSA 0118.1.
  • 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.

Number 1 Grade
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.

Premium Grade
Description
Same as Number 1 Grade, except that all product shall be 100% edge grain. All other descriptions from Number 1 Grade apply.

Number 2 Grade
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-labelâ„¢ 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.

Number 1 Grade
Description
Manufactured from Number 1 Grade Certi-Split® shakes. Lengths 24-inch; thickness ½” medium, ¾” heavy; widths not less than 9″ (measured on the inner surface at the butt end). 20 units per bundle.

CERTI-RIDGE® TAPERSAWN HIP & RIDGE UNITS

Number 1 Grade, Blue Label
Description
Manufactured from quality Number 1 Grade Certi-Sawn® shakes. Lengths 18-inch; 24-inch; thickness 5/8″, ¾”; widths not less than 9″ (measured on the inner surface at the butt end). 20 units per bundle.

Number 2 Grade, Red Label

Description
Manufactured from Number 2 Grade Certi-Sawn® shakes. Lengths 18-inch, 24-inch; thickness 5/8″ or ¾”; widths not less than 9″ (measured on the inner surface at the butt end). 20 units per bundle.

Exposures
The hip & ridge exposure should be equal to or less than the exposure in the field of the roof, and should not exceed the maximum exposure for the specified length and grade.

Recommended Use

The appropriate hip and ridge unit should be selected to match the adjacent shingles or shakes. However, in many areas a tapersawn hip and ridge units is used on both shingle and shake applications. Hip and ridge product type selection should be performed in accordance with the aesthetic look desired.

 

  • Class A, B & C fire ratings may be obtained by specifying Certi-Guard® pressure impregnated fire-retardant treatment, on number 1 grade product.
  • 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-labelâ„¢ cedar shake and shingle hip and ridge units are manufactured by members of the Cedar Shake & Shingle Bureau are graded in accordance with UBC Standards No. 15-3 and 15-4 and/or CSA 0118.1.
  • 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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