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Why Spray Polyurethane Foam

Why Spray Polyurethane Foam

Spray polyurethane foam (SPF) is a category of high-performance insulation and air/vapour barrier material that offers an alternative to traditional building insulation. Due to spray polyurethane foam’s fully adhering properties, it seals hard-to-reach areas and provides unequaled air sealing properties for your entire home.

Investing in spray foam is a great solution to transforming your house into a comfortable home.

How Does Spray Foam Insulation Work?

Spray polyurethane foam (SPF) is unique because it can expand many times its original size to cover surfaces, creating a seamless barrier that fills gaps, holes and air leaks. Specialized equipment is used to apply the spray polyurethane foam and proper technical training is required to ensure that it’s applied safely.

Spraying SPF

Benefits of Spray Foam Insulation

  •  Comfort - Helps prevent air leakage from the outside, improving the overall comfort of the home.
  •  Improved Indoor Air Quality - A tighter home envelope contributes to lower levels of humidity, dust and pollen inside the home.
  •  Energy Efficiency - Less energy required for heating and cooling resulting in lower utility costs and long-term savings.

Different Types of Spray Foam Insulation

Spray foam insulation can most commonly be found as either open-cell or closed-cell.

Open-Cell

Open-cell foam is a low-density, spray polyurethane foam that can be used to insulate your home. Open-cell foam is also known as ½ pound foam, as it weighs 0.5 lbs. per cubic foot. Since open-cell foam is made up of fine cells of air, the R value is typically between 3.5-3.7 per inch. Due to its relatively low density, open-cell foam stays somewhat soft and flexible after curing.

Open-cell spray foam is often applied to garages and rim joists (where applicable). Due to the soft texture and open-cell structure, it makes for great sound dampening properties for your home. Open-cell foam cannot be used for external wall applications.
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Open cell SPF Open cell SPF

Closed-Cell

Closed-cell foam is a medium density, polyurethane foam that is 4x higher in density than open-cell. As a result, it is more rigid and difficult to crush than open-cell foam. It is also called 2-pound foam, as it weighs 2 lbs. per cubic foot. The R-value (LTTR) per inch of closed-cell foam is typically from 5 to 6 per inch since it contains a captive blowing agent. The high R-value/inch saves valuable living space. Closed-cell SPF is an insulation and can function as a vapour barrier and an air-barrier system for your home. It is commonly used as continuous insulation, interior wall cavity fill, and for other applications throughout your home.

It serves as high-performance insulation that can be installed virtually anywhere in your home. It is often used where there is need for higher effective R-value, making it a good solution for Canadian climates.
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Closed cell SPF Closed cell SPF

What is R-Value?

R-value measures the resistance of heat flow. The higher the R-value, the greater the insulating power.

Spray polyurethane foam (SPF) can be applied at different thicknesses depending on the R-value that you need to achieve within the different areas of your home and required R-value. There are many factors that determine the required R-value, including building codes and climate zones.

What is Long-Term Thermal Resistance (LTTR)?

In Canada, the long-term thermal resistance (LTTR) value is the only recognized R-value used in design and architectural insulation R-value requirements, with only one test method approved in the building code.