Sealing and insulating the basement walls helps to reduce humidity and ... it’s recommended to use sealing tape, caulk, or spray foam insulation to fill any crevices, gaps, seams, or narrow ...

One of the important tips to finish basement walls is to stop these leaks ... One is expanded polystyrene (XPS) boards. The other is spray foam insulation, which is a combination of polyurethane ...

While it's fun to speculate on “if these walls could talk,” when it literally ... it won’t be as effective as spray foam insulation, Bennett explains. “You also lose some space in the ...