Where should moisture barrier be placed?
Vapor barriers are usually best installed on the side of the wall that experiences the hotter temperature and moister conditions: the inner surface in colder climates and the outer surface in hot, humid climates. In existing spaces, oil-based paints or vapor-barrier latex paints offer an effective moisture barrier.
What is the difference between vapor barrier and moisture barrier?
Moisture and Vapor Barriers These two terms essentially refer to the same thing. Moisture barriers and vapor barriers are both building materials designed to prevent water from getting past the barrier. No vapor barrier is capable of stopping all moisture from passing through.
What is a moisture barrier under a house?
A vapor barrier is a plastic liner that covers the dirt “floor” of your crawl space. Its purpose is to block vapors and moisture in the soil from getting into your crawl space. The air in your crawl space gets into your home. Your house is made of materials that are porous: wood, concrete, even fiberglass insulation.
Is there such a thing as waterproof insulation?
Waterproof rigid insulation is used on roofs. Expanded polystyrene, or XPS, extruded polystyrene, or EPS, and polyisocyanurate, or polyiso, are the three main types of rigid, closed-cell insulation materials. XPS, EPS and polyiso keep homes sealed and protected against everything from rain to snow, ice and hail.
Is 30 lb felt a vapor barrier?
Asphalt-saturated Kraft paper found on fiberglass batt insulation is a common form of a Class II vapor retarder. Asphalt felt (often called 15# and 30# roofing felt), Grade D paper, and some types of house wraps are common forms of moisture barriers.
What insulation can get wet?
Foam board insulation products are generally considered water and mold resistant but expanded polystyrene foam boards (EPS) have air bubbles that can collect moisture and become wet.