Solid Brick Walls Need Special Care
Many Victorian homes in Belleville have solid brick walls with plaster on the inside and no cavity for insulation. Brick soaks up rain and dries out to both sides. If you seal the inside of a brick wall with the wrong material, the brick can stay wet and crack in a freeze.
We do not spray foam directly against the inside of old brick unless there is a plan for drying. In most century homes, the better value is in the attic, the roof line and the basement, where foam does not affect the brick.
Rubble And Stone Foundations
Belleville's old houses commonly stand on rubble or cut limestone. Those walls are lumpy and out of plumb, so batts and foam board never sit tight against them. Closed cell spray foam insulation follows every bump and grips the stone.
We check for active leaks first. A stone wall that runs with water needs a drainage fix before any insulation goes on.
Knee Walls And Sloped Ceilings Upstairs
Story-and-a-half homes have knee walls and sloped ceilings on the top floor. These rooms are hot in summer and cold in winter because the insulation behind them is thin or missing. Spraying the roof line behind the knee wall fixes both problems. The attic insulation page explains roof deck work.
Spray Foam Insulation Without Removing The Plaster
Original plaster can stay where it is. Most of the work happens from the attic, the cellar and behind the knee walls. If a renovation has already opened a wall, we can foam it before it closes.