Rim Joist Insulation
Stop Cold Basement Drafts and Eliminate Ice-Cold Main Floors
Why Rim Joists Are The #1 Source of Basement Drafts
The rim joist (or band joist) area is where your home's wooden frame meets its concrete foundation. Because wood and concrete expand and contract at different rates, significant gaps open up around the entire perimeter of your basement ceiling.
Without proper air sealing, cold outdoor air constantly pours into your basement, pulling heat out of your main floor living areas and forcing your furnace to run continuously.
Signs Your Rim Joists Need Insulation:
- Freezing cold kitchen & living room floors
- Drafty basement or chilly crawlspace
- Unusually high winter gas bills
- Old, sagging fiberglass batts crammed in joists
Closed Cell Spray Foam Sealing
Traditional fiberglass batts stuffed into rim joists do NOT stop airflow — air passes right through fiberglass. Star Companies applies 2 to 3 inches of closed-cell spray foam directly to the rim joist perimeter.
Warm Up Your Basement & Floors Today
Contact Kansas City's Certified Energy Experts® for a free rim joist evaluation.