Remove the old insulation boards carefully without causing any damage to the walls.
How to install insulating foam board in an attic.
You can use a foamboard adhesive to glue it in place.
Put the board between the rafters.
Your board must leave at least inch gap between the board and the roof.
If you plan on finishing your attic then you cannot install it directly.
How to install foam board on a walk in attic door.
Step 2 install insulation boards.
Next you will need to place the foam board insulation between each joist as a test.
No matter how much insulation you add to your home s walls floors and ceilings you re throwing your money away if you don t insulate your attic.
If it fits proper with no space between on either side of the board pick it up and put a thin layer of glue on.
Remove any existing pieces of insulation that might have been covering the attic walls until now.