Installation Guide

Formula for calculating material at reduced exposures:
Square footage divided by reduced coverage = total
material required e.g. you are estimating a roof that
measures 3200 square feet (32 squares). You have
decided to put 16" Certigrade shingles (No.1 Blue Label
or No.2 Red Label) at 4" exposure.
The above coverage table (Table 1) tells you that a
4-bundle square at 4" exposure covers 80 square feet.
3200 divided by 80 = 40 squares of material
Maximum exposure recommended for roofs
SLOPE LENGTH
18" 24"
4:12 and steeper 7 1/2" 10" (a)
(a) 24" x 3/8" handsplit shakes limited to 7 1/2" maximum weather
exposure per UBC and IBC.
(a) 5 bundIes will cover 100 sq. ft, roof area when used as starter-finish course at 10" weather
exposure; 7 bundles will cover 100 sq. ft. roof area at 7 weather exposure; see footnote (d).1/2"
(b) Maximum recommended weather exposure for 3-ply roof construction.
(c) Maximum recommended weather exposure for 2-ply roof construction.
(d) All coverage based on an average 1/2" spacing between shakes.
(e) Maximum recommended weather exposure.
*100 sq. ft. coverage is based on 12/12 pack, 5 bundle square, at 7 exposure.1/2"
SHAKE TYPE, LENGTH AND THICKNESS
5 5 1/2 7 1/2 8 1/2 10
18" x 1/2" Handsplit-and-Resawn Mediums (a)* – 75(b,f) 100(f,c) – –
18" x 3/4" Handsplit-and-Resawn Heavies (a)* – 75(b,f) 100(f,c) – –
18" x 5/8" Tapersawn* – Approx. 75(b) 100(f,c) – –
24" x 3/8" Handsplit – – 75(e) – –
24" x 1/2" Handsplit-and-Resawn Mediums – – 75(b) 85 100(c)
24" x 3/4" Handsplit-and-Resawn Heavies – – 75(b) 85 100(c)
24" x 5/8" Tapersawn – – 75(b) 85 100(c)
24" x 1/2" Tapersplit – – 75(b) 85 100(c)
18" x 3/8" Straight-Split – 65(b) 90(c) – –
24" x 3/8" Straight-Split – – 75(b) 85 100(c)
15" Starter-Finish course Use supplementary with shakes applied not over 10" weather exposure.
Approximate coverage (in sq. ft.) of one square, when shakes are applied
with an average 1/2” spacing, at following weather exposures, in inches (d):
COVERAGE AND EXPOSURE TABLES
Maximum exposure recommended for roofs
Number 1 Blue Label 2 Red Label 3 Black Label
16" 18" 24" 16" 18" 24" 16" 18" 24"
3:12 to 4:12 3 3/4" 4 1/4 5 3/4" " 3 1/2" 4" 5 1/2" 3" 3 1/2" 5"
4:12 and steeper 5" 5 1/2" 7 1/2" 4" 4 1/2" 6 1/2" 3 1/2" 4" 5 1/2"
Number Number
SLOPE
LENGTH
3 1/2" 4" 4 1/2" 5" 5 1/2" 6" 6 1/2" 7" 7 1/2"
16" x 5/2" 70 80 90 100*
18" x 5/2 1/4" 72 1/2 81 1/2 90 1/2 100*
24" x 4/2" 73 1/2 80 86 1/2 93 100*
NOTE: * Maximum exposure recommended for roofs.
LENGTH AND
THICKNESS
Approximate coverage of one square (4 bundles) of shingles based on following weather exposures
Shingle Coverage Table 1
20
Shake Coverage Table 3 see footnote (f) below
Shingle Exposure Table 2
Shake Exposure Table 4
(f) Note: While most 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 should
cover 100 square feet at 7 1/2 exposure. 9/9 "
pack should give 75% coverage of a square.
Check with your supplier to confirm specific
packaging (bundle size) used for your order.
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