The higher R-value of closed-cell spray foam makes it stand out from the lot. As per the US Department of Energy, closed-cell spray foam boasts an R-value of approximately 6.5 per inch. Comparatively, fiberglass batt insulation has an R-value of 3.5 per inch and blown cellulose insulation, 3.7 per inch.
Closed-cell spray foam insulation in North Carolina is created by mixing two chemical components: polyol resin and isocyanate. These react to create a foam that hardens and expands. The hardened foam comprises millions of closed cells filled with a gas that provides insulation.
The trapped gas provides thermal resistance, reducing heat conduction through the foam. That, combined with the insulation provided by the solid foam structure, gives closed-cell spray foam its superior insulation performance.
A Spray Polyurethane Foam Alliance study indicated that closed-cell spray foam insulation could last 20-30 years or more while maintaining its insulation properties. That’s ten more than the average insulation materials, such as fiberglass batts, which typically last 10-20 years.
Closed-cell spray foam hardens upon curing to form a solid, rigid structure that can withstand the test of time and elements. That can’t be said for other insulation materials as they settle, compress, or shift over time.
Its solid structure also makes it more resistant to insects and pests, which often infiltrate and damage insulation. Unlike other types of insulation that contain organic materials, closed-cell spray foam doesn’t break down or decompose and lasts longer than most other materials.
Creating a tight seal around the building envelope helps reduce air leakage and heat transfer. Closed-cell spray foam insulation is highly effective at improving a building’s energy efficiency by reducing the need for heating or cooling. In turn, this reduces the building’s carbon footprint.
This insulation type also has low to no volatile organic compound (VOC) emissions. That means it contributes to better indoor air quality and reduces the potential for harmful off-gassing.
Also, closed-cell spray foam generates very little waste during installation. Unlike other insulation materials, such as fiberglass batts, it does not require trimming, cutting, or fitting, which can generate significant waste. Its longevity also means it can last throughout the building’s life, reducing the need for insulation replacement and waste generation.
Closed-cell spray foam insulation creates an air-tight seal when applied correctly. The insulation is sprayed directly onto surfaces in the building and expands to fill gaps, cracks, and voids.
The seamless insulation layer eliminates air gaps, preventing heat loss and outside air infiltration, resulting in substantial energy savings.
Due to its impermeability, closed-cell spray foam insulation in North Carolina also serves as a moisture barrier. Since the insulation is sprayed in place, all gaps and seams that could allow moisture to seep into the building are sealed.
This insulation also provides condensation control by maintaining consistent temperatures in the building. That helps prevent mold growth, improve indoor air quality, and protect the building’s structure from moisture damage.
Closed-cell spray foam insulation has a rigid structure that can help reinforce and strengthen the building’s structure. The hardened foam forms a solid, cohesive layer that can help prevent the movement or shifting of building components, improving overall stability and structural integrity.