How Does Spray Foam Insulation Work?

More articles in this series:

SPF, a spray-applied cellular plastic, is made by mixing chemicals to create foam.  The chemicals used within the foam react when mixed together and then expand on impact. It can enlarge up to 100 times in size, creating an effective layer of insulation and protection against moisture. Those chemicals react very quickly, expanding on contact to create foam that insulates, air seals and provides a moisture barrier.

When properly installed, SPF forms a continuous barrier on walls, around corners and on contoured surfaces. It resists heat transfer very well and is an effective solution for reducing unwanted air infiltration through cracks, seams, and joints.

SPF insulation applied by professionals is usually described as either a high- or low-pressure foam and is available as either open- or closed-cell. Each type has advantages and disadvantages depending on the application requirements.

Did you know?

What is Spray Foam InsulationSpray Foam Insulation is considered to be one of the most versatile forms of insulation available. Its continuous membrane, which can adhere to virtually any building or structure, including awkward shapes such as curves and voids, contains the most efficient insulating properties used in modern industry. It can weatherproof and stabilize structures thereby extending the life of many old buildings.

Applied in liquid form, the material expands to the required thickness then sets in a rigid foam state, providing a continuous, seamless thermal barrier, eliminating drafts and condensation problems, saving energy and costs. It is the most efficient insulation per thickness giving unrivaled insulating benefits and reducing U-values.

Benefits of Spray Foam Insulation

√ Lowers energy cost
√ Stops drafts, allergens and condensation
√ Improves indoor air quality
√ Will not settle or shrink
√ Quiets indoor environments
√ Fills irregular shapes
√ Increases climate comfort
√ Adds structural strength
√ Seals voids and cracks
√ Provides a barrier against pests
√ Lowers carbon footprint


Applications for Spray Foam:

ResidentialPitched roof insulation | Flat roof insulation | Wall insulation | Floor insulation | Barndominium insulation | Rim joist insulation | Attic insulation | Crawl space insulation | Basement insulation | Mobile home insulation

Commercial: Warehouses | Metal buildings | Agricultural buildings | Subfloors | Schools | Hospitals | Municipal buildings | Industrial buildings | Office buildings