How To Insulate An Exterior Wall In A Bathroom

Buy unfaced friction fit batts and seal the walls with a 4 mil poly vapor retarder.

How to insulate an exterior wall in a bathroom.

Use special airtight electrical boxes see photo tip 5 or seal the poly to the electrical box with acoustical sealant. In an older home there s a good chance that no one insulated the exterior wall before installing the shower. Proper insulation will help keep your bathrooms a comfortable temperature year round. There are two ways to fix this problem.

Seal the gap between the bottom plate of the wall and the floor with acoustical sealant or caulk. 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. The batt should not be tightly compressed against the studs.

Install vapor barriers after the bathroom s plumbing electrical and insulation are complete. They are painted on surfaces and form a waterproof seal over drywall. 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. Place the insulation slabs or batts inside the wall cavity between the studs.

When you reach the end of the wall cut off the insulation. Handy homeowners can rent an insulation blower. 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. Add soundproofing to add soundproofing weave a continuous roll of fiberglass insulation between staggered studs using insulation designed for 2x4 walls.

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