Batt Insulation Lay In Attic

Find your zone on the map and then use the chart to determine the level of insulation you need to properly insulate your attic walls floors and crawlspaces.

Batt insulation lay in attic.

Insulation should be rolled out perpendicular to the joists and unfaced rolls should be used. Install baffles against the roof sheathing between rafters so insulation does not seal up these avenues of air circulation. Batt insulation is available at home centers and lumberyards. You only want one vapor barrier in your attic and it should be as close to the ceiling as possible to prevent warm moist air from coming up from the heated house and condensing when it hits the cold air in the attic.

Item 305816 model rxss31525. Use cardboard or rigid foam baffles to keep soffit vents open. Don t cover can lights unless they are rated for contact with insulation. Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation.

It s safer to build a small enclosure with hardware cloth or plywood to keep loose insulation away from lights and exhaust fans. The paper facing on insulation has an asphalt layer which acts as a vapor barrier. Attic insulation is accomplished with either fiberglass blankets batt or blown in insulation. Batt or rolled insulation or blown loose fill insulation fiberglass or cellulose can be installed on top of old insulation.

One that i like a lot since i built a house out of them is the structural insulated panel. Air movement is critical in the attic so moisture moves outside the home. Blown in insulation requires a professional. Rockwool safe n sound r 59 7 sq ft unfaced stone wool batt insulation 15 25 in w x 47 in l.

It s a sandwich of rigid foam insulation and plywood or osb oriented strand board the flaky plywood. While wearing dust mask and gloves carry r 38 batts of unfaced fiberglass insulation into the attic. Continue laying down the insulation making sure the batts are pressed tightly together at all edge and end joints. This allows the termination of the batt in an area.

Lay the batts across the ceiling joists covering the existing insulation. Any existing batt or roll insulation in the attic should have the facing against the attic drywall floor or no facing at all.