Is it a good or bad idea to spray foam directly on the interior of shiplap siding?
...understand how you would get the insulation onto the siding unless this is a cottage with open stud walls so you see the back of the siding from inside the house. But the short story is – walls need to be able to dry, and I don’t see how they will if you spray foam the back of the wood. Exterior siding is meant as a we...