How Much Blow In Insulation Do I Need For Attic

Blown in insulation overview.

How much blow in insulation do i need for attic.

Looking to install blown in insulation but don t know how much you need. Ten inches of blown insulation provides an insulating value of approximately r 30 1 inch of fiberglass provides about r 2 7 while 1 inch of cellulose is approximately r 3. Most of ga al ar sc ok etc to a high of 49 for zones 6 8 i e. First things first you need to go up into your attic inspect the condition of the insulation and calculate the current level of insulation.

Blown in insulation machine rental if doing it yourself you ll have to pay for machine rental. How much does attic insulation cost. This calculator is to be used as an estimating tool only. Then check out our handy insulation calculator.

If you need to add insulation in your attic save big by blowing in cellulose insulation yourself. Blowing attic insulation isn t hard but it s dusty sweaty work. Your attic should have a certain amount of insulation in it and the recommended level of insulation for your attic is dependent on where you live. This range varies from a low of 30 for homes with heat pumps or natural gas furnaces in zone 3 i e.

Input length width and desired r value of the area to be insulated. Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation. Recommended insulation levels for retrofitting existing wood framed buildings. The pros charge 1 500 to 2 000 to do a 1 200 sq ft.

Wy mt nh me wi etc once you ve determined the r value of insulation you need to decide which type of insulation you will use. The zone you live in will determine how much insulation you need in your attic. Length 10 ft width 6 feet bag coverage 16 5 cubic ft r value per 1 3 6 required r val. Labor if hiring someone else you ll pay about 37 65 per hour or 15 per bag for the labor and any additional costs.

Inspecting your attic insulation. 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. You can do it yourself for about 500. Add insulation to attic.

Existing 3 4 inches of insulation. 12 area 10 6 60 square ft required depth to achieve r value needed r 12 r 3 6 3 3 inches volume needed 60sq ft 0 275 3 3 12 converting to decimal ft 16 5 cubic feet you would need one bag in this case. Each bag of fiberglass insulation will cover approximately 65 square feet of attic space to a depth of 10 inches cellulose insulation covers half as much.