Rim Joists, Walls & Encapsulation for Jersey City homes
The rim joist, where the house framing sits on the foundation, is one of the leakiest spots in any older home. In Jersey City basements we often see daylight through gaps in that area. Add bare foundation walls and a humid crawl space, and you get cold floors upstairs and damp air drawn up into living space.
We seal and insulate rim joists with closed-cell spray foam, insulate foundation walls with foam or rigid board appropriate for below-grade use, and encapsulate crawl spaces with a heavy vapor barrier sealed to the walls and piers. Where moisture is a problem, we'll recommend dehumidification and drainage steps before insulating.
Signs it's time to call
- Cold floors above the basement or crawl space
- Musty smell in the basement or throughout the house
- Visible gaps or drafts at the top of foundation walls
- Condensation on pipes or ducts in the basement
- Exposed dirt floor in the crawl space
How we do it
- Moisture and drainage check before any insulation
- Rim joists cleaned and sealed with closed-cell foam
- Foundation walls insulated with below-grade-rated material
- Crawl space vapor barrier installed and sealed at seams and walls
- Recommendations for dehumidification if needed
What you get
Warmer floors
Stopping cold air at the rim joist makes a noticeable difference upstairs.
Drier air
Vapor barriers cut the moisture rising from soil.
Fewer pests
Sealed gaps leave fewer entry points for insects and rodents.
Many Jersey City customers pair basement & crawl space insulation with spray foam insulation or attic air sealing, so both can be handled in one visit.
Have a question about your home? Send us the details and we'll reply with honest advice and a written quote, or call (201) 459-9050 any time.
