Add the right kind of insulation.
How much attic insulation do i need.
Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation.
Department of energy it s recommended that attics have an r 38 to r 49 or about 12 to 15 of fiberglass or cellulose insulation.
Use our roll insulation calculator to estimate the amount of wall insulation crawlspace insulation or attic insulation you need for your project.
The average recommended level is 17 inches of r60.
The thicker the better.
When adding additional insulation you do not have to use the same type of insulation that currently exists in your attic.
Use unfaced insulation when adding more insulation to an attic that already has some insulation laying the rolls or batts at right angles to the floor joists.
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.
Existing 3 4 inches of insulation.
According to the u s.
Then check out our handy insulation calculator.
Our tool can act as a rolled insulation calculator a wall insulation calculator and even an attic insulation calculator.
Whether you need a wall insulation calculator or an attic insulation calculator lowe s blown in insulation calculator has you covered.
It is not uncommon to see 15 to 20 of insulation in a well insulated attic.
If your insulation doesn t measure up and you need more installation can be done as a weekend diy project or you can call a professional installer to handle the job.
In zone 1 the average minimum requirement for attic insulation is 9 inches of r30 fill.
Looking to install blown in insulation but don t know how much you need.
The higher the r value the better the thermal performance of the insulation.
How much insulation do i need in my attic.
Recommended insulation levels for retrofitting existing wood framed buildings.
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.
How much insulation in attic for zones 1 4.
Add insulation to attic.
The average recommended level is 14 inches of r49.
In zone 2 the average minimum requirement for attic insulation is 9 inches of r30 fill.