What Are CCA Treated Shakes and Shingles?
The question can be answered in two parts:
What is CCA?
What does it do for roof shakes and roof shingles?
What is CCA?
CCA is the abbreviation for chromated copper arsenate. It’s a pesticide, and — as its name implies — it’s made of chromium, copper, and arsenic.
CCA on Roofs
CCA is an application that protects wood from fungi, microbes, termites, and other pests that can wreak havoc on wood shakes, shingles, support beams, and more. The copper causes the wood to take on a greenish tint. Over time, the green color will start to fade as the wood dries in the sunlight.
CCA has been used to treat wood products since at least the 1940s. However, there is some concern as to its effects on people and animals that come into contact with it. There are also environmental concerns if the chemicals are leached from the wood into the environment.
The Environmental Protection Agency (EPA) has not banned chromated arsenicals, nor does it require the removal of pre-existing structures made from wood treated with them or the soil around the structure. In fact, the EPA recommends applying oil- or water-based protectants “on a regular basis” to wood treated with chromated arsenicals.
Cedar Shake & Shingle Bureau
Cedar shakes and shingles manufactured by members of the Cedar Shake & Shingle Bureau (“CSSB”) are labeled with the “Certi” brand name. What does that mean for you? It means that your Certi-label™ cedar shakes and shingles are manufactured by experienced craftspeople only. They take pride in the production and quality of their shakes and shingles. Member mills are bound by rigid local, national, and international quality codes. Compliance is maintained via unannounced, independent inspections conducted by accredited third parties.
Shakes and shingles preserved with a CCA treatment are protected from mildew, fungal decay, and pests. This helps add to the longevity of your treated roof. Material warranties on the preservative treatment are available from the treatment manufacturers.
Please contact CSSB for specific details.