Why is the attic painted silver?
Tuesday, June 26, 2018
There are two likely reasons for attic roof sheathing that is painted silver. If the paint is a dull silver color, there was a fire in the attic or in the house below and the paint is used to seal the smoke particles to the wood. Silver paint is also sometimes used as a radiant barrier, to reflect solar heat that penetrates the roofing back out of the attic, and that type of silver paint would be somewhat reflective. You would also see some glitter flecks in the surface. The photo above is an example of silver paint sprayed onto the under side of the roof sheathing and top chords of roof trusses as a radiant barrier.
Another way to have a radiant barrier in the attic is to install foil-backed roof sheathing plywood, like in the photo below.
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