Steps:
- Use an infrared camera to detect hot and cold areas around all doors, windows and walls on the first floor.
- Go upstairs and use the camera to check along the corners between the walls and floors.
- Also audit un-insulated partitions (interior walls) looking for areas that reveal cold air between the wall studs.
- Put on a dust mask and work gloves, and climb into the attic to inspect the insulation.
- Lift the insulation batts covering interior partitions. Look for any gaps and spaces between attic floor and the top plate of the partition.
- Stuff fiberglass insulation into large gaps, then seal over the top with expanding foam insulation.
- Wait for at least 20 minutes for the foam to harden, then lay the fiberglass batts back down on the attic floor.
- Check where attic insulation meets the eave. Be sure it’s not blocking the flow of fresh air from the soffit vents.
- Cut cardboard baffles to fit between the roof rafters. Slip the baffles into place and staple them to the rafters.