We have a 3-year-old utility building with vertical walls made of Stimpson
Plywood Siding (Dura Temp). It looks exactly like pine or cedar siding. In
fact, we thought it was wood until today when we started to put up a
trellis. The siding is made up of several wood plys with an outside ply of
masonite with a grain pattern stamped into it. Is there anything you can
seal this stuff with to make sure it doesn't take water?
Are you sure you don't have DuraTemp confused with Stimson's lap siding?
There was a class action suit against LP for problems with the composite
product and Stimson was (is?) still paying out for defective siding.
But DuraTemp is a true plywood with a hardboard face - still being
produced and still OK for exterior use.
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