Attic Insulation Material Ratings
Cellulose a fiber insulation material with a high recycled content is blown into a home attic.
Attic insulation material ratings. Inspecting your attic insulation. 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. Square footage of your attic. Most homes have some old or existing attic insulation already in their attic.
Measure the length and width of the area you need to insulate. Let s say the insulation you ve selected has an r value of three per inch. Contractor or insulation installer s fee. First things first you need to go up into your attic inspect the condition of the insulation and calculate the current level of insulation.
The various performance levels r 19 r 30 and r 38 is all made from the same insulation material only the thickness of the insulation differs in order to achieve different r values and performance. Decide on the type of insulation to use. Existing 3 4 inches of insulation. Type and material of your insulation.
Insulation our building science makes insulation br smarter. Add insulation to attic. Measure the area needing insulation. In particularly cold climates you might go up to r 60.
The main factors that impact the cost are. From schools to businesses to family homes our insulation works everywhere. If your current insulation is only five inches deep you will need to add seven inches of insulation to achieve the 12 inch r 38 rating. Cellulose insulation is calculated based on the depth of the blown in 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. Existing 3 4 inches of insulation. According to home advisor insulating your attic can cost between 1700 to 2100. Multiply the length times the width to determine the square footage of the space.
Add insulation to attic. In general an attic s r value should be between r 30 and r 49. Recommended insulation levels for retrofitting existing wood framed buildings.