Certi-Guard® Shakes & Shingles

Permanent fire protection is provided by pressure impregnating fire retardant polymers into the innermost cells of cedar shakes and shingles to meet Class A, B and C testing standards.


Identification: The Certi-Guard® label identifies cedar shakes and shingles which have been pressure-impregnated with fire-retardant polymers to provide permanent fire protection.

Class B shakes and shingles are identified by their red Certi-Guard® label.

Class C shakes and shingles are identified by their blue Certi-Guard® label.

Class B and C labels must identify the treatment company, the independent testing laboratory, and the building code research number.

Class A wood roof systems can be attained with a component system. Check with the treatment company for installation details.

Material: Certi-Guard® is manufactured from Premium and Number 1 Grade Certi-Split® or Certi-Sawn® cedar shakes or Number 1 Grade Certigrade® cedar shingles.

Check with your local building official and fire official to ensure that the product meets local approval requirements. Treatment company application guidelines should be followed.  Ask the treatment company for installation instructions for Class A, B and C shake and shingle roof systems.

Test Standards: ASTM E-108, UL -790, NFPA-256, UBC Standard 15-2

INTERMITTENT-FLAME TEST
 Class
Flame Temperature
Flame ON minutes
Flame OFF minutes No. of Test Cycles
A
1400 +/- 50 F
2
2 15
 B
1400 +/- 50 F
2
2 8
C
1300 +/- 50 F
1
2 3

BURNING BRAND TEST
 Class
Brand Size
Brand Wood
No. of Brands
A
12" by 12" | 2¼" inches thick
Douglas Fir
2
 B
6" by 6" | 2¼" inches thick
Douglas Fir
2
C
1½" by 1½" |  25/32 inches thick
White Pine
20

RAIN TEST
 Class
Exposure
A, B, C
Twelve one week conditioning cycles of 96 hours of water exposure at a rate of 0.7 inches of water per hour, followed by 72 hours of drying time at 140 degrees F. This equates to 20 to 30 years of actual outdoor rain and wear.

*After the rain test and each weathering test period, the shakes and shingles are again subjected to the intermittent Flame, Burning-Brand and Flying Brand test.


SPREAD-OF-FLAME TEST
 Class
Flame Temperature
Flame Application
A
1400 +/- 50 F
10 minutes
 B
1400 +/- 50 F
10 minutes
C
1300 +/- 50 F
4 minutes

FLYING BRAND TEST
 Class
Flame Temperature
Flame Application
A
1400 +/- 50 F
10 minutes
 B
1400 +/- 50 F
10 minutes
C
1300 +/- 50 F
4 minutes

WEATHERING TEST
 Class
Exposure
Test Years
A, B, C
Actual outdoor weathering
1, 2, 3, 5, and 10

Manufacturers, inspectors, brokers, distributors, retailers, wholesalers, builders, architects, installers, and technicians have been assembling, recording, and distributing their knowledge of the wood roofing industry through the Cedar Shake & Shingle Bureau for over 89 years. This information is therefore provided as a service, and no warranty, express or implied, is given. The CSSB shall not be liable for any direct, indirect, incidental, or consequential damage in connection with the use of the material supplied on these pages.