How Much Blow In Insulation Do I Need For Attic

First things first you need to go up into your attic inspect the condition of the insulation and calculate the current level of insulation.

How much blow in insulation do i need for 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. Length 10 ft width 6 feet bag coverage 16 5 cubic ft r value per 1 3 6 required r val. Blown in insulation machine rental if doing it yourself you ll have to pay for machine rental. How much does attic insulation cost.

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. You can do it yourself for about 500. 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. This range varies from a low of 30 for homes with heat pumps or natural gas furnaces in zone 3 i e.

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. Most of ga al ar sc ok etc to a high of 49 for zones 6 8 i e. Whether you need a wall insulation calculator or an attic insulation calculator lowe s blown in insulation calculator has you covered. Click the button to calculate the depth in inches and pounds of total insulation required for this job.

Looking to install blown in insulation but don t know how much you need. Labor if hiring someone else you ll pay about 37 65 per hour or 15 per bag for the labor and any additional costs. Existing 3 4 inches of insulation. 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.

Blown in insulation overview. 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. Blowing attic insulation isn t hard but it s dusty sweaty work. Then check out our handy insulation calculator.

The zone you live in will determine how much insulation you need in your attic. If you need to add insulation in your attic save big by blowing in cellulose insulation yourself. Recommended insulation levels for retrofitting existing wood framed buildings. Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation.

Input length width and desired r value of the area to be insulated. Add insulation to attic. A furnace or water heater flue in the attic requires an insulation dam around it usually of 1 inch.