Certigrade™ Red Cedar Shingles
If required in your area our ICBO number is: ICBO
ES ER 5327
"Wood shingles and shakes have
long been favored as roofing materials because they are attractive,
durable and provide good insulation from heat and cold...the commercially
treated shingles self extinguish (even) after 10 years of weathering."
Techline, U.S. Department of Agriculture
"In my eight years as California
State Fire Marshall and 15 years in fire suppression,
I am unaware of any pressure-impregnated fire retardant
cedar roof that has contributed to the spread of
any fire in California or the United States."
Phil Favro, Former
California State Fire Marshall
"Even after many decades of
wear and tear, pressure-impregnated cedar shakes
and shingles will remain fire retardant."
Susan Levan, U.S. Department
of Agriculture
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Number 1 Grade, Blue Label
Description - Lengths 16 inch, 18 inch, 24 inch;
width 4" minimum, 14" maximum
on 24 inch and 3" on 16 inch and 18 inch; thickness of 16 inch is 5/2" (5 butts
together is 2" thick), 18 inch is 5/2¼" thick, 24 inch is 4/2" thick. Clear
heartwood; 100% edge grain; no defects.
Recommended Use - For walls
and roofs on 3:12 pitch and steeper where a premium quality
product is desired.
Number 2 Grade, Red Label 
Description - Lengths
16 inch, 18 inch, 24 inch; thickness of 16
inch is 5/2", 18 inch is 5/2¼", 24 inch is
4/2"; width 4" minimum, 14" maximum. Face must
be 10", 11" and 16" clear or better on 16 inch,
18 inch and 24 inch shingles, respectively. Limited
sapwood and flat grain are allowed. Limited knots
and defects are allowed above the clear portion.
Recommended Use - For
walls and roofs on 3:12 pitch and steeper where a good
quality product is desired.
Number 3 Grade, Black Label 
Description - Lengths 16 inch, 18 inch, 24 inch;
thickness of 16 inch is 5/2", 18 inch is 5/2¼", and 24 inch is 4/2". Width 3" minimum,
14" maximum on 18 inch and 24 inch, 2½" minimum on 16 inch. Face must
be 6" clear on 16" and 18 inch, 10" clear on 24 inch. Unlimited sapwood
and flat grain allowed. Limited knots and defects above clear portion.
Recommended Use - For walls and roofs on 3:12
pitch and steeper where an economy product is acceptable.
Undercourseing Grade
Description - Lengths 16 inch and 18 inch, thickness
5/2" and
5/2¼", respectively; width 2½" minimum, 17" maximum. Unlimited
defects, flat grain and sapwood.
Recommended Use - For the underlying
starter course at eaves and undercoursing for double course wall construction.
Special Undercoursing
Same grade requirements as undercoursing grade, except
each bundle also contains the machine production of No. 3 grade shingles.
Roof Exposure Table
Pitch
|
Maximum
exposure recommended for roofs
|
| Length |
| No.1
Blue Label |
No.2
Red Label |
No.3
Black Label |
| |
16" |
18" |
24" |
16" |
18" |
24" |
16" |
18" |
24" |
| 3/12
to 4/12 |
3¾" |
4¼" |
5¾" |
3½" |
4" |
5½" |
3" |
3½" |
5" |
| 4/12
and steeper |
5" |
5½" |
7½" |
4" |
4½" |
6½" |
3½" |
4" |
5½" |
Wall Exposure Table
| Max.
Weather Exposure |
| Shingle
Length |
Single
Course |
Double
Course |
| 16" |
7½:" |
12"* |
| 18" |
8½" |
14"** |
| 24" |
11½" |
16" |
*Maximum exposure for #2 grade
is 10"
**Maximum exposure for #2 grade is 11"
- Class B & C fire
rating may be obtained by specifying Certi-Guard
permanent fire retardant Certigrade shingles.
- Certi-Last CCA treated shingles are available for added longevity and come with a 30 year warranty against rot and fungal decay.
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- Products manufactured by members of the Cedar Shake & Shingle Bureau are graded in accordance with UBC Standard No.32-11 and/or CSA 0118.1
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