LEXINGTON Blog

What is Spray Foam Insulation and what are the Benefits?

Spray foam insulation is a type of insulation material that is commonly used in residential and commercial construction to improve energy efficiency and comfort. It is made by mixing and spraying two chemical components, polyurethane or another type of foam, onto surfaces where insulation is needed. The two components react when they come into contact, expanding and forming a rigid or semi-rigid foam that fills gaps, seals cracks, and adheres to the surfaces it's applied to.

There are two main types of spray foam insulation:

1. Open-Cell Spray Foam: This type of spray foam is less dense and has a lower R-value (a measure of thermal resistance) compared to closed-cell spray foam. It is typically used in interior applications and provides some soundproofing qualities. Open-cell spray foam is more flexible and allows moisture to pass through, which can be an advantage in certain situations.

2. Closed-Cell Spray Foam: Closed-cell spray foam is denser and has a higher R-value compared to open-cell foam. It is often used in exterior applications, such as roofing and wall insulation. Closed-cell foam is impermeable to moisture and provides a strong structural component when applied to surfaces.

The benefits of spray foam insulation include:

1. Excellent Thermal Insulation: Spray foam insulation has a high R-value, which means it is very effective at reducing heat transfer. It helps keep buildings warmer in the winter and cooler in the summer, leading to energy savings and increased comfort.

2. Air Sealing: Spray foam insulation is an effective air barrier. It can seal cracks, gaps, and other openings in walls, roofs, and ceilings, preventing the infiltration of outside air and the escape of conditioned air from inside, which reduces energy loss.

3. Moisture Resistance: Closed-cell spray foam is impermeable to moisture, making it a good choice for areas prone to water intrusion. It can help prevent mold and mildew growth and protect against moisture-related damage.

4. Sound Insulation: Spray foam can also provide some degree of soundproofing, reducing noise transmission between rooms and from outside sources.

5. Longevity: When properly installed, spray foam insulation can last for many years without significant degradation.

6. Improved Structural Strength: Closed-cell spray foam can enhance the structural integrity of a building, especially when used in roofing applications.

7. Reduced Allergens and Pollutants: By sealing gaps and cracks, spray foam insulation can help reduce the infiltration of allergens, pollutants, and outdoor contaminants into indoor spaces.

While spray foam insulation offers numerous benefits, it's important to note that professional installation is crucial to its effectiveness. Incorrect installation can lead to problems such as off-gassing of chemicals or inadequate insulation. Additionally, it tends to be more expensive upfront than some other insulation materials, but its long-term energy-saving benefits often offset the initial cost. Our experts at Koala Insulation of Lexington are here to help get your home running more comfortable all while saving you money on your energy bills.