Install insulation in front of and behind electrical wiring.
Insulation is important to have in each of your home's exterior walls. Many times, these walls will have electrical wiring running through them. If you were to lay the insulation over the wires, you would be left with an air gap between the back of the insulation and the exterior wall. This air gap would fill with cold air which would eventually find a way into your home. Insulating both behind and in front of the wire fills this gap and provides better protection.
Instructions
1. Measure the wall gap from the bottom plate to the top plate. Lay a piece of insulation on a flat work surface. Transfer the measurement you took to the insulation and make a small mark with a utility knife.
2. Lay a level on the insulation, lining up the level's edge with the mark you made in Step 1. Press down on the level to compact the insulation. Cut through the insulation with a utility knife, using the level as a straight edge.
3. Insert the insulation into the wall cavity between the wall studs. If your insulation has a paper vapor barrier, open the barrier's side flanges and lay them over the wall studs. Staple the flanges' upper portion to the wall studs.
4. Split the insulation in half from the bottom up. Push one half behind the electrical wires and lay the other half over the top of them. If your insulation has a paper vapor barrier, lay the side flanges over the wall studs and finish stapling them in place all the way down to the bottom plate.
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