If your home is older you probably think you are doomed to a cold drafty house due to the expense of removing drywall, plaster or other walls products in order to install insulation.
Most contractors are pushing spray foam more accurately called pour in place foam insulation as a way to insulate pre-existing walls without removing drywall, but there is another way.
Blowing Insulation into Existing Walls
With the right equipment, insulating walls can be achieved with cellulose or fiberglass blown-in insulation. We recommend using cellulose when insulating pre-existing walls because it can be installed more easily and with a tighter compaction.
This process can be dusty and will require some cleanup when it is complete but the advantages of insulating the walls without removing drywall are huge. Besides, cleanup is also needed if you remove the walls, insulate and put drywall back as you can see in this video:
How to Insulate Walls from the Inside
The process is simple when insulating your walls from the inside without removing the walls.
Step 1 - Take a thermal image of the walls to determine where studs and fire blocks are located.
Step 2 - Drill appropriate amount of holes to ensure insulation can reach all areas. (Warning - sometimes access is limited by headers or other obstructions inside or around the walls.
Step 3 - Blow in insulation.
Step 4 - Plug holes and paint.