I’m working on an old house, they replaced the old siding with new preprimed ceder lap siding. The carpenter told us that it would be great if we would caulk all the laps, so we did on two sides of the house. I told this to a friend at the paint store, he said this might be a problem; The siding won’t be able to breath or move and may cause a mildew problem latter!! What do you think?
Caulking Lap Siding