Basement Spray Foam Insulation In New Hamburg, Ontario

Damp Basements Ruin Fibreglass Batts

Most finished basements were done with batts in a stud wall and a sheet of plastic stapled over them. If the concrete behind is damp, that moisture has nowhere to go. Batts slump, studs go black and the room starts to smell like a root cellar.

Closed cell basement spray foam insulation is sprayed right onto the masonry. Water does not wick into it, and at full depth it serves as the vapour retarder too. That suits cellars near the Nith River, where floodwater in 2018 and 2020 reached houses in the low end of town.

Find And Fix Water Before Spraying

Foam does not waterproof anything. Water trickling down a wall or puddling on the slab has to be dealt with first. At the visit we look for active leaks, tide lines and white powder on the concrete, and if a wall is not ready, we say so.

After the wall is dry and the leaks are handled, basement spray foam insulation is the logical next step.

Older Stone And Block Walls Need A Different Approach

Houses in New Hamburg's heritage core often stand on rough fieldstone or hollow block. Foam board rocks and gaps on a surface that uneven, and batts leave hollows behind them.

Sprayed on, the foam fills every dip and ridge. It seals the joints between stones and blocks, and it can cover the rim joist above on the same day. Our rim joist spray foam insulation page covers that part in more detail.

Finished Basements Need A Covering Over The Foam

Basement spray foam insulation in a room you live in needs a fire-rated covering, and half-inch drywall does the job in most houses. We spray between or behind your framing, and the drywall hangs afterward like normal.

Cold Foundation Walls Sweat In Summer

Humid July air drifts down the basement stairs and touches concrete that is still cool from the ground. Water beads on the wall, carpet goes damp along the edge and the dehumidifier runs nonstop.

Closed cell basement spray foam insulation keeps that humid air off the cold concrete, because the foam surface stays close to room temperature. Most owners notice the dehumidifier filling more slowly by the end of the first summer.

What Basement Spray Foam Insulation Costs

Basement spray foam insulation on foundation walls runs roughly $3 to $5.50 a square foot. The depth you pick, the shape of the walls and how much stuff needs shifting all change the price. Your quote lists each piece separately.