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We’ve included two types of insulation on the exterior walls. Batt insulation rated at R22 and 1 1/2″ of rigid insulation on the exterior.

Fibreglass Insulation

Fibreglass insulation is made of extremely fine glass fibres. This is the most common type of insulation in homes. In the walls of our homes we install batt insulation and in the attic it is loose-fill. The batt insulation is fitted between the studs in the walls.

Fibreglass insulation works by slowing the spread of heat and cold by trapping pockets of air within the material.


R-Value is the capacity of an insulating material’s resistance to heat flow. Basically, that means the higher the R-Value, the greater the insulating power of the material. Fibreglass insulation can be rated for different R-Values and you can also double up the material to get even more insulation.

Fiberglass insulation can get you to the higher R-Value you need to achieve because you can double and even triple the material.

Fiberglass Insulation Pros
  • Relatively inexpensive in comparison to other types of insulation materials.
  • Suited for standard stud and joist spacing that is relatively free from obstructions.
  • It is easy to install.
Fiberglass Insulation Cons
  • While installing small particles that come into contact with skin can lodge in pores, causing itchiness, rashes, and irritation.
  • It still allows for airflow, which is a major source of high energy bills and uncomfortable room.
  • When it is disturbed, fiberglass insulation releases particulates into the air, which may be inhaled by those installing or removing it.
  • Fiberglass can trap allergens, dust, and moisture, which can lead to mold growth.

To see how fibreglass insulation is installed check out the video below.

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.

Air Leakage

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.

For more information on how this type of insulation is made check out this video below.