Find the total length of all the walls to be insulated.
Do i need sidewall insulation in attic.
For diy attic insulation you ve got two choices.
After confirming that your attic is air sealed you need to select insulation.
Insulation level are specified by r value.
Sidewalls where plumbing fixtures are to be placed must be insulated before the fixtures are installed.
Kneewalls of attic spaces finished as living areas.
Once you ve decided which type is best for you examine the material options and prices to home in on the right product.
There are many types to choose from including blown in cellulose batt such as fiberglass mineral wool or cotton.
Loose fill or batt the common term for blanket insulation.
The higher the r value the better the thermal performance of the insulation.
Be sure you do not cover soffit vents as the attic must be properly ventilated to dissipate excess heat and moisture during the summer.
Let s say the insulation you ve selected has an r value of three per inch and.
Floors over unheated or open spaces such as garages porches unconditioned basements or cantilevered floors.
You d need a thickness of.
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.
Sloped walls and ceilings of attic spaces finished as living areas.
First things first you need to go up into your attic inspect the condition of the insulation and calculate the current level of insulation.
Inspecting your attic insulation.
In general an attic s r value should be between r 30 and r 49.
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.
In particularly cold climates you might go up to r 60.
R value is a measure of insulation s ability to resist heat traveling through it.
Both can be added to uninsulated attics or layered over existing material.
Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation.