Energy Saving Devices

Insulating any floors above your unheated garage will help reduce the energy costs for the above conditioned space.

Before insulating or deciding whether to add insulation to these floors, first see our information about adding insulation to an existing house or selecting insulation for new home construction if you haven’t already.
Insulation Techniques

When insulating floors over unconditioned garages, use the following techniques:

* Seal the joint between the header or band joist and the subfloor
* Seal the joint between the top or sill plate and the header joist
* Seal all air leakage sites in the floor (e.g., electrical penetrations)
* Trim insulation to fit snugly with no gaps
* Staple the kraft paper to the floor joist from above instead of using wire mesh or stay wires to hold the insulation in place
* Install an air barrier to prevent cold air in the garage from “short circuiting” the insulation underneath the subfloor

Source: U.S. Department of Energy