What is spray foam insulation?

What is spray foam insulation?

Spray foam insulation is a two-component mixture composed of isocyanate and polyol resin that come together at the tip of a gun, and forms an expanding foam that is sprayed onto roof tiles, into wall cavities, etc. Spray foam insulation saves energy and costs.

Studies show that 40% of a home’s energy is lost as the result of air infiltration through walls, windows and doorways. Buildings treated with spray foam insulation typically insulate as much as 50% better than traditional insulation products.

In addition to building temperature and moisture control, spray foam insulation is often used to reduce noise.

What are the benefits of spray foam insulation?

  • Improved indoor comfort.
  • Acoustic insulation that results in quieter houses.
  • A reduction of air infiltrations.
  • Lower heating and cooling costs each month.
  • Improved energy efficiency.

New construction or renovation building?

The most common type of spray foam insulation is the polyurethane foam insulation. Various systems are used to apply the spray foam:

  • The two component high pressure system is generally used in new home construction. It is a quick expanding type of spray foam.
  • The two component low pressure spray foam is another system that is used primarily for remodel jobs where there are existing walls with drywall already in place.

Open cell and closed cell spray foam insulation.

Spray foam insulation can be categorized into two different types:

  1. Open cell foam insulation. Is a type of foam where the tiny cells are not completely closed. It is a very good air barrier. It is often used for interior walls because it provides sound reduction.
  2. Closed cell foam insulation. This foam insulation has a smaller, more compact cell structure. It is a very good air barrier as well as a water vapor barrier. It is often used in roofing projects or other outdoor applications, but can be used anywhere in the home.


Would you like to watch a real case of spray foam application? Download the video: