We install spray foam insulation from Icynene

Foam insulation is a popular choice in insulation. Spray foam insulation:

• Is applied as a liquid, foam insulation expands to 100 times its volume in seconds to fill every crack and crevice.
• Expands to 100 times its volume in seconds to fill every crack and crevice. 
• Remains flexible after installation, and the integrity of the building envelope seal remains intact over time. 
• Acts as a complete insulation and air barrier to minimize air leakage and seal the building envelope for optimal airtightness.
• Can be used throughout a home or as an air sealing product only.

Foam insulation comes in two forms – open cell and closed cell.
 
OPEN-CELL FOAM

Open-cell foam is soft. The walls (or cells) of the bubbles are broken, and air fills these spaces. This makes the foam soft and pliable, similar to a rubber ball. The R-value of the insulation is related to the value of the air inside these broken bubbles. Open cell insulation density is up to one pound per cubic foot.

CLOSED-CELL FOAM
Closed-cell foam is solid, as the cells of the bubbles remain intact, which makes the product rigid. The cells are filled with a gas that makes the R-value higher than that of open-cell foam. Closed-cell foam has varying degrees of hardness, depending its density, but is typically 1.5 pounds to 4 pounds per cubic foot.