Technical Specifications

SIDEWALL COVERAGE TABLE

Certi-Split Shakes-Coverage (Number One or Premium Grades)

7" 8 1/2" 10" 11 1/2" 14" 16" 18"

18" x 1/2" Handsplit-and-Resawn Mediums 70 85 100 115 140 – –

18" x 3/4" Handsplit-and-Resawn Heavies 70 85 100 115 140 – –

18" Tapersawn 70 85 100 115 140 – –

24" x 3/8" Handsplit & Resawn 70 85 100 115 140 160 180

24" x 1/2" Handsplit-and-Resawn Mediums 70 85 100 115 140 160 180

24" x 3/4" Handsplit-and-Resawn Heavies 70 85 100 115 140 160 180

24" Tapersawn 70 85 100 115 140 160 180

24" x 1/2" Tapersplit 70 85 100 115 140 160 180

18" x 3/8" True-Edge Straight-Split (4 bundle square) 50 60 71 82 100 – –

18" x 3/8" Straight-Split (5 bundle square) 82 100 118 135 165 – –

24" x 3/8" Straight-Split 70 85 100 115 140 160 180

Starter Course: Underlying course can be the Number 1 Grade product used on outer course or a lower grade product.

Shake Type, Length and Thickness

• Shakes are packaged in bundles, secured with a metal

strap. Each bundle will have a Certi-label underneath.

• While most 18" shakes are packed in bundles of 12

courses each side (12/12) they may be packed 9/9. This

will alter the number of bundles required to cover

1 square.

For example: 18" shake bundles, 12/12 pack, 5 bundles,

should cover 100 square feet at 7 1/2" exposure.

9/9 pack, 5 bundles, should give 75% coverage of a

square at 7 1/2" exposure. When ordering check with your

supplier to confirm bundle size.

Sidewall Shake PackagingCoverage Guidelines

Exposure

• Sidewall squares are calculated in a different manner

than roof squares.

• Remember to deduct window and door areas from

coverage calculations.

Product Coverage Calculations

Ensure you have the following information:

1. Size of wall area you are trying to cover, measured in

square feet.

2. Application and exposure to be used

3. Product type used

4. Amount of product in each box or bundle

Your supplier will be glad to assist you. As usual, always

check with your local building official for requirements in

your area.

Approximate coverage, in square feet, of one square of shakes applied at indicated weather exposures. (Some exposures on this

chart are not acceptable for single course application. Consult the maximum exposure table on page 12 for more details).

Please note: Handsplit shakes are also known as Handsplit-and-Resawn shakes.