Question 1

What are the disadvantages of rigid foam insulation?

Accepted Answer

The primary drawbacks are its higher cost compared to other insulation types and the need for proper installation to prevent air and moisture infiltration.

Question 2

What are the two main types of rigid foam insulation?

Accepted Answer

The two main types are XPS (extruded polystyrene) and polyisocyanurate (PIR). Each offers different levels of R-value and moisture resistance, making them suitable for various applications.

Question 3

How does rigid foam insulation work?

Accepted Answer

Rigid foam insulation works by trapping air or gas within its cellular structure, reducing heat transfer. Its high R-value ensures effective thermal performance, preventing heat loss or gain.

Question 4

How thick should rigid foam insulation be?

Accepted Answer

The required thickness depends on the application and desired R-value. For example, a 2-inch foam insulation board typically provides an R-value of 10, suitable for exterior walls and foundations in colder climates like Ontario.

Question 5

What makes XPS rigid foam insulation ideal for basements and foundations?

Accepted Answer

XPS offers excellent moisture resistance and maintains a stable R-value of 4.7 to 5.0 per inch, making it perfect for below-grade applications in damp environments.

Question 6

Can rigid foam insulation be combined with other types of insulation?

Accepted Answer

Yes, rigid foam insulation can be combined with other insulation types to enhance energy efficiency, particularly in areas with irregular wall cavities.

Question 7

How does rigid foam insulation improve energy efficiency?

Accepted Answer

Its high R-value helps maintain indoor temperatures by preventing heat transfer, reducing energy consumption, and lowering utility bills.

Question 8

Are rebates available for installing rigid foam insulation?

Accepted Answer

Yes, NRCAN offers rebates through the Canada Greener Homes Loan program. An energy audit with a certified NRCAN energy advisor is required to qualify.

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