Elevate's RESISTA is a high-performance polyisocyanurate (PIR) insulation board laminated on both sides to a gas-tight, multi-layered aluminum-kraft facer (AK) or mineral-coated glass fiber facer ...

The first problem is the challenge of adding effective insulation within ... wood rafters and roof boards inside. This is where insulating from the top, both for floors and roofs, can help.

while the heat fan shuttles warm air from the attic to the ground floor when outside temperatures are low. Cost: $300 (attic insulation), $23 per 4' x 8' board (solar sheathing), $4,000 (new roof ...