Rigid Foam Insulation
Rigid foam insulation is applied to the exterior of the home. Since it is on the exterior of the home it provides a continuous insulation barrier in comparison to fibreglass insulation that is installed between the studs. It is made of rigid plastic foam and can be 1-2 inches thick. In 104 Forsey Avenue, we have chosen 1.5 inches.
Continuous rigid insulation also provides an effective solution to thermal bridging. Thermal bridging can occur along the exterior walls of the home due to temperature changes. The as the different materials change the temperature at different rates they can start to bow slightly. By using rigid foam on the exterior of the wall it helps to mitigate this issue.
Rigid foam insulation has another key benefit in making an energy-efficient home. It reduces air leakage throughout the home. When sealed with proper techniques rigid foam is an excellent air barrier. Unlike house wrap, which works to prevent infiltration (air coming into the building) but is poor at stopping exfiltration (air moving out of the building), rigid foam is able to do both.
Adding rigid foam insulation to the exterior of a home is more costly. However, this is just a short-term, fixed cost. Rigid foam often pays for itself with lower utility bills over the long term. And it may put off or prevent costly work to repair rot in walls or framing.