How To Install Insulation Board In Attic

Choose fiberglass insulation batting.

How to install insulation board in attic.

Step 2 install insulation boards. Measure the length and width between two rafters in your attic and transfer the measurements to a 4 ft by 8 ft of rigid foam insulation board. 2 snap a chalk line between the length measurements. Keep foam board insulation away from direct sunlight prior to installation.

If you re installing additional insulation in an attic that s already insulated use unfaced insulation that doesn t have a vapor barrier. Remove the old insulation boards carefully without causing any damage to the walls. Check pipes and vents. Plan to pull up the flooring and layer new insulation on top of the old.

The grade of batting will vary depending on the wall that you re insulating. There are various grades of insulating batting for different locations in the house so you ll need a different insulation for interior exterior attic or basement walls. It will degrade its r value. The best way to install foam board insulation under drywall is to frame the wall with 2x3 inch lumber for the top and bottom plates and 2x2 inch lumber for the studs.

The r value of the batt measures the thermal resistance so the higher the r value the more effectively. When installing the foam use caulk or tape for maximum insulation between the material and the board or floor. But if the floor is covered in plywood you can t stuff enough insulation beneath it to do the job sufficiently not even in warm climates. Foam insulation boards can be attached to concrete walls as well and in such a case care should be taken not to chip the cement.

Before installing determine the insulation material best suited for your home. So if you re installing insulation in an attic that doesn t have any used faced insulation and put the paper side down toward the ceiling. No matter war kind of insulation you currently have in your attic one q. Choose your insulation type.

Because the simplest and cheapest way to insulate an attic is to add material to the floor. All foam boards absorb water vapor. Cut your foam insulation panels to fit between the furring strips. I am going to put a four foot runway of boards down.

Cover the insulation with a vapor barrier before you install it. Home insulating tips for attics how do i know if i need more insulation in my attic.