Adding Extra Insulation To Attic Walls

It needs to be unfaced.

Adding extra insulation to attic walls.

Attic hatch or door. How much does attic insulation cost. Insulation should be rolled out perpendicular to the joists and unfaced rolls should be used. There are various grades of insulating batting for different locations in the house so you ll need a different insulation for interior exterior attic or basement walls.

Fiberglass is just that thin fibers of glass that trap air. 3 have a friend add material to the hopper. Blowing attic insulation isn t hard but it s dusty sweaty work. Cellulose is recycled newsprint treated with a fire retardant.

The grade of batting will vary depending on the wall that you re insulating. Turn off the power to the outlet. With boric acid added for fire resistance shredded recycled telephone books tax forms and newspapers all contribute to making safe cellulose insulation blown in cellulose is injected into the wall cavities by a series of holes drilled into either the inside or outside of the walls. Batt or rolled insulation or blown loose fill insulation fiberglass or cellulose can be installed on top of old insulation.

Most attics are insulated with blown in loose cellulose r 3 5 per inch blown in loose fiberglass r 2 5 per inch or fiberglass batts r 3 2 per inch. Blown in insulation overview. The r value of the batt measures the thermal resistance so the higher the r value the more effectively. Add weatherstripping around the perimeter and a sweep to the door of a walk up attic.

You can do it yourself for about 500. Any existing batt or roll insulation in the attic should have the facing against the attic drywall floor or no facing at all. You should be able to see if there is insulation in the wall. Choose fiberglass insulation batting.

Use a zippered insulated tent to keep the enclosure draft free attic tent at 7 attic cover insulator 120. You can add loose fill on top of fiberglass batts or blankets and vice versa. The pros charge 1 500 to 2 000 to do a 1 200 sq ft. Blowing in attic cellulose is conceivably a do it yourself job.

Block all vents in the attic floor with baffles making sure to extend the baffles at least four inches above the planned thickness of your insulation. If you need to add insulation in your attic save big by blowing in cellulose insulation yourself. Affix rigid foam insulation to the attic side of the hatch or door. When adding additional insulation you do not have to use the same type of insulation that currently exists in your attic.

Pull out a small amount of insulation if needed to help. As you keep adding more and more insulation you keep reducing the heat flow through the wall more and more. If you use fiberglass over loose fill make sure the fiberglass batt has no paper or foil backing. Pull down stair or ladder.