Attic Insulation Sides

An insulated kneewall is effectively an exterior wall so you ll need a layer of rigid foam drywall osb or thermoply on the back side of the kneewall to prevent cold air from degrading the performance of the insulation.

Attic insulation sides.

Insulation level are specified by r value. Photos 1 6 show how it s done. This method of insulation won t work if the triangular attic includes ducts or plumbing pipes. This barrier is meant to keep moisture from getting to the insulation in the walls and ceilings and it is required by building codes when insulating most houses.

But before you cut any holes plan the locations of the attic vents. Houses with gable roofs may also have vents located on the side of the house. Use a zippered insulated tent to keep the enclosure draft free. Mark the roof venting locations from the attic where you can see the rafters and avoid placing roofing vents over them.

The higher the r value the better the thermal performance of the insulation. Begin at a wall and work toward the center of the attic floor or the entryway carefully placing insulation between joists and ensuring a snug fit. Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents. Vapor barriers are sheets of plastic or other material placed on one side of insulation sheets.

Air migrates from warmer spaces toward colder spaces and insulation is designed to help prevent or at least slow that migration. R value is a measure of insulation s ability to resist heat traveling through it. I put the paper side facing toward the inside of the house. Some of the insulation in the attic is the stuff that blows on and doesn t have a paper side.

Affix rigid foam insulation to the attic side of the hatch or door. Pull down stair or ladder. The table below shows what levels of insulation are cost effective for different climates and locations in the home. Attic hatch or door.

If using insulation with a vapor retardant facing install the material with the vapor retardant side down. Add weatherstripping around the perimeter and a sweep to the door of a walk up attic. Facing is a thin layer of paper or plastic attached to one side of. Adding attic vents is a simple matter of cutting holes and installing vents.

In any case the vapor barrier must point to the warm side.