Preservative Treated

Preservative Treatment (otherwise known as CCA Treated or pressure treated) protects wood against fungal decay often associated with high heat and humidity conditions. This treatment has proven to prolong the life of cedar roofing or siding.

Identification

The CERTI-LAST label identifies cedar shakes and shingles which have been pressure impregnated with wood preservatives to the standards of the Cedar Shake & Shingle Bureau.

Material

Certi-Last is manufactured using Certi-Split cedar shakes, Certigrade cedar shingles or Certi-Sawn cedar shakes.

Application

Shakes and shingles are applied according to standard specifications of the Cedar Shake & Shingle Bureau. The treating company or chemical manufacturer may have special requirements regarding flashing, fasteners, etc.

30/50 Year Warranty

Certi-Last shakes and shingles are warranted from failure due to fungal decay.  The warranties are issued and backed by the treating company and/or chemical manufacturer.  The product is sold under the Certi-Last trademark when treated to the minimum established standards.

Recommended Use

Certi-Last is recommended for use on roofs in the shaded area of the map below, having a climate index of more than 65 as identified in the USDA Forest Service Research Paper FPL 109-1973.

Preservative Treated Cedar Shakes & Shingles - Recommended Use

 

 

Cedar Shakes & Shingles BureauB.C. Shake & Shingle Association
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    Images – Reference #s: 5,11, 23, 22B, 24A, 26B – courtesy of Cedar Shake & Shingle Bureau. Consult www.cedarbureau.org for the most current technical details.