How Deep Should Blown Insulation Be In Attic

Inspecting your attic insulation. If your hoses have to wind their way through the house to reach a scuttle the attic access in a hallway or closet lay down tarps along the way. Your helper will feed the blown in insulation into the hopper while you work the hose up in the attic photo 5.

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A poorly insulated attic lets heat escape through the roof wasting energy used to warm.

How deep should blown insulation be in attic.

How deep to put blown in insulation. The blower should include two 50 ft. When blown into attics and wall spaces loose fill fiberglass offers an average r 2 5 thermal value per inch the higher the number the greater the insulating effect. First things first you need to go up into your attic inspect the condition of the insulation and calculate the current level of insulation.

Note from this chart that the ideal r value differs for each part of your home. For loose fill cellulose this translates to a total depth ranging from 8 inches. It is not uncommon to see 15 to 20 of insulation in a well insulated attic. The thicker the better.

You d need a thickness of. If your attic insulation is only a few inches thick or if you can see the ceiling joists you re wasting money on your heating and cooling bills. For example if you have a type of insulation that has an r value of r 5 per inch of thickness you will need a depth of 6 inches of this insulation installed your attic to reach r 30 if you live in zones 2 or 3. Always cover the tops of the ceiling joists to make sure the insulation is deep enough to reach your target r value and to prevent thermal bridging the heat loss that occurs through the wood framing.

In temperate coastal areas such as zone 3 attic insulation of at least r30 up to a maximum of r60 is recommended. 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. Hoses that you can connect and snake into the attic. Attic insulation is a key to saving energy during the heating season.

The insulation in your attic should be at least 12 thick. Add the right kind of insulation when adding additional insulation you do not have to use the same type of insulation that currently exists in your attic. The recommended level for most attics is to insulate to r 38 or about 10 to 14 inches depending on insulation type. Work from the perimeter of the attic toward the door or hatch so that you don t trample all over the insulation you just put in.

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