Hi, I covered our whole house with Cedar Shakes about 20 years ago. Well, now they have all turned black, I am told that the black is a kind of mold. So, I bought a power washer and power washed thwe WHOLE house. It came out very good.
My question is: what can I use to seal the shakes so they will not turn black to quick? Some people said to use Thompson's some people said NOT to use Thompson's. So, I thought I would ask the experts. Thanks in advance for any help.
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Check out this suppliers site. They have some good tutorials and a selection of some of the best products. http://www.opwdecks.com/
The last cedar shingle restoration I did, I used Defy products, oxygen bleach, wood brightener and their original clear. Now there are newer products. On vertical siding, I get about 6-8 yrs depending on exposure.
Thompson's does a lot of advertising. Some of us that have used it don't find it to last more than a few months and it seems to promote mildew growth. Flood's CWF used to be a great clear but that was back before the EPA stopped the use of certain additives. I was very disappointed with it the last time I used it. Products keep changing, their latest products may be an improvement but I haven't used them.
I wish I could remember the specific product. More important than preserving the shingles there is a sealer made for shingles that makes them almost fireproof. Cedar shingles especially when they get old get so flammable that a bottle rocket can burn your house down.