CERTI-LAST® PRESSURE IMPREGNATED PRESERVATIVE TREATED RED CEDAR SHAKES AND SHINGLES

Overview
Long term protection from fungal decay is provided with factory pressure impregnated treatment of preservatives that will extend the life of cedar shake and shingle roofs. Material warranties on the preservative treatment are available from the treatment manufacturers.

Please note: Certi-Label™ products are available with either pressure impregnated preservative treatment(Certi-Last®) or pressure impregnated fire-retardant treatment (Certi-Guard®) but not both.

Identification
The Certi-Last® label identifies red cedar shakes and shingles which have been pressure-impregnated with wood preservatives to the standards of the Cedar Shake & Shingle Bureau (AWPA C34-97).

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.

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

CERTI-GUARD® PRESSURE IMPREGNATED FIRE RETARDANT TREATED CEDAR SHAKES AND SHINGLES

Overview
Permanent fire protection is provided by pressure impregnating fire retardant polymers into the innermost cells of cedar shakes and shingles for Class A, B and C shake and shingle roof systems.

Please note: Certi-Label™ products are available with either pressure impregnated preservative treatment(Certi-Last®) or pressure impregnated fire-retardant treatment (Certi-Guard®) but not both.

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 treating 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, UIL -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"
Douglas Fir
1
2¼" inches thick
B
6 by 6 inches
Douglas Fir
2
2¼ inches thick
C
1½" by 1½"
White Pine
20
25/32 inches thick

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.

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

*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.

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.