How To Insulate An Exterior Wall In A Bathroom

If the whole batt cannot fit inside the cavity cut off the excess material with a scalpel knife leaving a couple of centimeters over on each side to ensure a tight fit.

How to insulate an exterior wall in a bathroom. There are two ways to fix this problem. Bathroom projects need special consideration because of the humidity and moisture that bathrooms generate. Tuck the insulation into the cavity snug against the top of the stud bay and edges flush with the studs. Buy unfaced friction fit batts and seal the walls with a 4 mil poly vapor retarder.

Weave loosely to fill the cavity but tightly enough so you won t have to compress the insulation when you install drywall. Place the insulation slabs or batts inside the wall cavity between the studs. Liquid barriers may also be used to prevent moisture from getting into the walls. Press the poly into the sealant.

Proper insulation will help keep your bathrooms a comfortable temperature year round. They are painted on surfaces and form a waterproof seal over drywall. Handy homeowners can rent an insulation blower. Seal the gap between the bottom plate of the wall and the floor with acoustical sealant or caulk.

For an accurate fit against the bottom of the cavity let the insulation run long then cut it against the bottom plate of the wall framing with your utility knife. The batt should not be tightly compressed against the studs. In an older home there s a good chance that no one insulated the exterior wall before installing the shower. Add soundproofing to add soundproofing weave a continuous roll of fiberglass insulation between staggered studs using insulation designed for 2x4 walls.

That will reduce its r value. When moisture becomes trapped in walls mold and mildew can grow damaging your home and presenting a potential health danger.