Spray foam

Spray foam is a type of insulation that is sprayed in place through a gun. Polyurethane and isocyanate foams are applied as a two-component mixture that comes together at the tip of a gun, and forms an expanding foam that is sprayed onto roof tiles, concrete slabs, into wall cavities, or through holes drilled in into a cavity of a finished wall.

Types of Spray Foam

There are two main types of spray foam: open-cell and closed-cell.

Open-cell spray foam is more dense than closed-cell spray foam insulation, and is spongy to touch. This gives it an effective sound dampening effect. It is less expensive than closed-cell spray foam insulation.

Closed-cell spray foam is a higher density product and is more expensive than open-cell spray foam. It has a smaller, more compact cell structure and a higher R-value per inch. It’s also a very good air barrier as well as a water vapor barrier. It’s often used in roofing projects or other outdoor applications, but can be used anywhere in the home.

Applications

Spray foam is used in a wide variety of applications, including roofing, wall insulation, building insulation, and packaging. It can also be used for sealing and insulating in many areas of the home, such as attics, basements, walls, and ceilings.

Health and Safety

The chemicals in spray foam may be harmful if inhaled. It is important to use proper personal protective equipment (PPE) when working with spray foam, and work in a well-ventilated area.

Environmental Impact

Spray foam insulation is considered to be a green building material. It can significantly reduce energy consumption, and it lasts as long as the building does, without needing to be replaced.

See Also

• Insulation
• Building insulation materials
• Polyurethane

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