Pressure Impregnated Treated Products
Certi-label® products can also be treated. Products are available either fire-retardant-treated OR preservative-treated. Special care must be taken to follow the treatment company’s recommended installation instructions.
Treated Products
Certi-Guard® Fire-Retardant Treated Cedar Shakes and Shingles
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1. General Information
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 |
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| 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 |
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| 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 |
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| 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.
FAQs about treated products can be found here: https://www.cedarbureau.org/literature-education/product-faq/
Testing information about Certi-Guard® products is located here: https://www.cedarbureau.org/cms-assets/documents/268016-338064.cedar-roofing-facts-017.pdf
2. Installation Information
Installation guides
Roofing Installation Video
3. Warranty Information
Manufacturer’s Lifetime Limited Warranty
Offered by Member Manufacturers of the Cedar Shake & Shingle Bureau (“CSSB”)
Warranty Submissions
For submission requirements see: Manufacturer’s Lifetime Limited Warranty.
Fraud Alert!
Download and read the fraud alert regarding manufacturer’s lifetime limited warranty.
Certi-Last® Preservative-Treated Cedar Shakes and Shingles
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1. General Information
Identification
The Certi-Last® label identifies red cedar shakes and shingles which have been pressure-impregnated with wood preservatives in compliance with the American Wood Preservers Association (C34 Standard). Preservative retention, penetration, and assay sampling criteria shall be in accordance with the AWPA U107and/or CSA 0118.1 Standard.
Material
Certi-Last® products are manufactured using Certi-Split® cedar shakes, Certigrade® cedar shingles, and Certi-Sawn® cedar shakes. The product is sold under the Certi-Last® trademark when treated to the established standards.
Application
Shakes and shingles are applied according to standard specifications of the Cedar Shake & Shingle Bureau. The treatment company may have special requirements regarding flashings, fasteners, etc. Contact the treatment company for more details.
Click here for quick tips including disposal methods.
Recommended Use
Certi-Last® is recommended for use on roofs in areas having a climate index of more than 65 as identified in the USDA Forest Service Techline Durability Paper III -3.
- Certi-label® cedar shakes and shingles are manufactured by members of the Cedar Shake & Shingle Bureau and are graded in accordance with UBC Standards No. 15-3 and 15-4 and/or CSA 0118.1.
- Contact the treatment company for treatment warranty information, accessory product requirements (including recommended fastener types) and application details for treated cedar material.
- 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
FAQs about treated products can be found here: https://www.cedarbureau.org/literature-education/product-faq/
2. Installation Information
Installation guides
Roofing Installation Video
3. Warranty Information
Manufacturer’s Lifetime Limited Warranty
Offered by Member Manufacturers of the Cedar Shake & Shingle Bureau (“CSSB”)
Warranty Submissions
For submission requirements see: Manufacturer’s Lifetime Limited Warranty.
Fraud Alert!
Download and read the fraud alert regarding manufacturer’s lifetime limited warranty.
