All About Spray Foam Insulation

June 5, 2023

Technician,Spraying,Foam,Insulation,Using,Plural,Component,Spray,GunAll About Spray Foam Insulation

In recent years, spray foam insulation has become a popular choice for homeowners looking to reduce their energy bills and increase their home’s energy efficiency. Spray foam insulation is a type of insulation that is made up of polyurethane foam and is applied to walls, ceilings, and floors. This kind of insulation is versatile, making it a useful addition to both new and existing homes. Here’s all you need to know about spray foam insulation.

What is Spray Foam Insulation?

Spray foam insulation is created from a mixture of isocyanate and polyol resin. When these two chemicals are combined, they react to form polyurethane foam, which expands and hardens quickly to provide insulation. Spray foam insulation is applied as a liquid, and as it is sprayed onto the surface, it begins to expand in volume. This expansion allows the insulation to fill in gaps and cracks in the walls, ceilings and floors more effectively and efficiently than other forms of insulation. Spray foam insulation comes in two types: open-cell and closed-cell.

Closed-Cell Spray Foam Insulation

Closed-cell spray foam insulation has a higher R-value than open-cell foam, making it a more effective option for insulating your home. This type of insulation is dense and hardens to become a waterproof barrier. The closed cells make the insulation resistant to moisture, air, and other environmental pollutants. Additionally, the closed-cell composition makes this type of insulation an excellent sound barrier, which can help cut down on noise pollution.

Open-Cell Spray Foam Insulation

Open-cell spray foam insulation is less dense and more flexible than closed-cell foam. It is applied as a liquid that expands and dries into a spongy material. This type of insulation is a more affordable option compared to closed-cell insulation. However, its lower R-value makes it less effective at insulating against extreme temperatures. Additionally, open-cell foam can absorb moisture, which may lead to mold growth if it is not adequately sealed.

Benefits of Spray Foam Insulation

Spray foam insulation offers numerous benefits that make it a popular choice among homeowners. Here are a few of the benefits of spray foam insulation.

1. Energy Efficiency

Spray foam insulation is a highly effective energy-saving solution. Its R-value is one of the highest among insulation materials, meaning it can provide better insulation than traditional forms like fiberglass. Spray foam insulation creates an airtight seal, preventing drafts, and reducing heat transfer.

2. Improved Indoor Air Quality

Spray foam insulation prevents air and moisture from penetrating the home, making it a useful barrier against mold, mildew, and other airborne pollutants. This feature is particularly important for homeowners prone to allergies or respiratory issues.

3. Reduced Noise Pollution

Spray foam insulation is an excellent sound barrier due to the added thickness created by the foam, blocking out unwanted outdoor noise.

4. Longevity

Spray foam insulation can last up to 80 years, making it a durable choice for insulation. The foam’s toughness and resistance to moisture, mold, and mildew ensure that the insulation remains intact and effective for a long time.

5. Environmentally Friendly

When compared to other insulation types, spray foam insulation has a lower carbon footprint, making it a more environmentally friendly choice. Also, a well-insulated home consumes less energy, resulting in reduced carbon emissions.


Spray foam insulation is a modern and efficient insulation choice for homeowners looking to reduce their energy bills, increase their homes’ energy efficiency, and improve indoor air quality. With the added benefits of noise reduction, longevity, and environmental friendliness, spray foam insulation can be a smart investment for any homeowner. To learn more about spray foam insulation, reach out to a professional insulation contractor in your area.

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