Home Insulation and Older Homes
Need The Tool But Not The Whole Kit - Bare Tools at Toolking.com
If you own an older home, the walls are probably only 4 inches thick. That means that they have only R 12 insulation. There is a couple of ways to cut energy costs by reducing heat loss through your outside walls.
If you are intending to renovate the inside of your house, then you can take out the old panels or drywall off the walls and add 2 inch ridged foam panels to the walls before putting on new drywall.
The other way to insulate the walls is to add 2 inch ridged foam panels to the outside of the wall. You would have to replace the siding as well. Either way this would bring your walls up to R20.
