Dear Jim: My fairly new house has blown-in attic insulation and good windows ... One common leakage spot is electrical wall outlets and switches on outside walls. Often, they are completely ...

After insulating the exhaust-fan ducts and sealing the knee wall attic floor where these pipes come through, the boards and loose insulation can be removed from between the rafters. It may be most ...

Indoors, check for gaps around doors and windows, switch plates, baseboards and attic hatches ... that fit behind the outlet and switch plates. Finally, Seal wall penetrations routed to the ...

behind and under attic knee walls, and in dropped-ceiling areas. Seal the small holes. You can easily do this by looking for areas where the insulation is darkened. Darkened insulation is a result ...

Attic air sealing - top plates and wall-to-ceiling connections are sealed • Attic knee walls - air barrier is installed at the insulated boundary (kneewall transition or roof, as appropriate ...