How to install floor, wall and roof insulation for more energy efficiency
Normal insulation covers the outside walls in either R-11 or R-19 depending on the thickness of the wall studs. The interior walls don’t need insulation. If you can maintain a high R-value in walls, around windows, doors and outlets, then your home will be more comfortable and more economical.
For a normal roof that uses regular trusses, the insulation is put into the rafters directly over the ceiling so there is a dead air space in the attic.
This helps regulate heat and moisture under the roof. Inadequate insulation will let the heat and cold pass through the ceiling so you will have high heating and cooling bills.
In time the build up of moisture can cause the attic to rot, but this takes a long time.
There are a few areas that often get overlooked when insulating. One of those areas is inside headers and between rough openings for doors and windows. Also behind outlets, switches, and any place where there are openings in the sheetrock.
Insulating walls is especially important if your home is located in a windy area.
You can use rolled fiberglass insulation or blown-in insulation. It depends on your budget. The most important thing is to get a good seal around the wall studs and especially the outlet, switch and light boxes in the walls. These are the culprits for wasting energy when they aren’t insulated thoroughly.
Installing the insulation is about as easy as anything can be, so I won’t spend any more time on it. It just makes economic sense to be thorough and to do a good job, you’ll be glad you did for many years afterward.
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