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Protecting shingles from UV

Posted by G.Kafka on October 8th, 1999 10:48 PM
In reply to prevent red cedar shingles from blackening; invisible storms by Pat Baker on October 8th, 1999 04:48 PM [Go to top of thread]

Hello Pat

To prevent the cedar from turning black you have to apply a penetrating stain with UV inhibiters.Clear stains don't last as long as semi transparent stains with a pigment.The color pigment prevents the sunlight from reaching the wood surface and preventing it from greying.Good quality penetrating stains can last up to 5 years
and even then you may only have to retouch a few spots that are in direct sunlight continuously(south walls).Red cedar tends to darken when you apply a sealer(hose down a section with water to see what I mean).If you want to keep the natural color of the cedar,choose a very light colored stain(Sikkens Light Oak or Behr White Cedar-what I used).This will give you the protection of a semi-transparent stain with a pigment,but it won't change the natural color too much.If you prefer a weathered look,first apply a bleaching compound(formula is somewhere on Bob's site) to turn the cedar grey then using a penetraiting stain to protect it.Check out Bob's site for more info on stains and preservatives.

Hope this hepls

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