Dear James: There is some unsightly paint blistering spot on our wood lap siding. What causes the paint blistering? What is the best way to repair just these blistered spots?—Dennis M.
Dear Dennis: In addition to looking bad, blistering and peeling can also lead to wood decay and loss of wall insulation value from the dampness. The blistering is likely caused by moisture that gets trapped in the wood and is drawn to the surface by the sun’s rays. This can happen for a number of reasons including humidity, construction defects or lack of effective vapor barriers.
