Basement and crawl space insulation in Manhattan

Cellar and basement insulation in Manhattan

In a Manhattan townhouse the cellar is usually unheated, and the parlor or garden floor above it pays for that. Cold air comes in where the floor framing meets the foundation and through old stone and brick walls.

What we do

• Rim joists: closed-cell foam seals the band at the top of the foundation, the leakiest spot in most cellars.
• Cellar ceilings: when the cellar stays unheated, we insulate under the floor above so the rooms stay warm.
• Foundation walls: when the cellar is heated or being finished, closed-cell foam on the walls slows the cold and the dampness.
• Under storefronts and passages: floors over unheated spaces in mixed-use buildings.

Finishing the cellar?

Have us foam the walls before the framing goes up. It is far easier than coming back later.

Common questions

Will foam fix water coming in? No. It slows dampness through the walls, but leaks need to be fixed first.

How long does it take? Most townhouse cellars take one day.