Many don’t like spray foam for several reasons but this is a missed opportunity for energy efficiency.
What is Closed Cell Spray Foam?
Closed cell spray foam is a type of insulation that expands upon application to form a dense, rigid barrier. Unlike open cell foam, which is softer and more flexible, closed cell foam has a higher density and offers superior moisture resistance and structural support. It consists of cells that are completely closed, creating an impermeable layer that is highly effective in sealing off spaces from air and moisture.
During a recent inspection of a home in New Orleans, a concerning issue came to light – an improperly applied closed-cell spray foam insulation. The photograph showcased a mere quarter-inch thickness of insulation, which falls far short of the recommended 1.5 inches necessary for an effective thermal and vapor barrier. Contact Sunhine Home Inspection here in New Orleans if you want your spray foam inspected or to help you decide if you want spray foam installed.
Benefits of Closed Cell Spray Foam in Crawl Spaces
1. Enhanced Energy Efficiency
Crawl spaces are notorious for being sources of energy loss in homes. Gaps and cracks allow cold air to seep in during the winter and hot air during the summer, leading to higher energy bills. Closed cell spray foam creates an airtight seal that significantly reduces air leakage, ensuring that your heating and cooling systems work more efficiently. This results in lower energy costs and a more comfortable living environment.
2. Moisture Barrier
One of the biggest challenges in maintaining a healthy crawl space is controlling moisture. Excess moisture can lead to mold growth, wood rot, and structural damage. Closed cell spray foam acts as a powerful moisture barrier, preventing water vapor from penetrating the insulation and entering your home. This helps to keep the crawl space dry and mitigates the risk of mold and mildew.
3. Structural Support
Closed cell foam adds strength to the areas where it is applied. When used in crawl spaces, it can reinforce floor joists and other structural elements, enhancing the overall stability of your home. This added rigidity can be particularly beneficial in regions prone to severe weather conditions.
Pest Issues
Crawl spaces can be inviting habitats for pests such as termites. Many wood destroying insect experts do not like spray foam installed in a crawl space because it can be more difficult to find termites. In this case, they can cause more wood damage before you catch them.
In the warm and humid climate of New Orleans, proper insulation is crucial for maintaining energy efficiency and a comfortable indoor environment. The thin layer of insulation observed in this home is insufficient to provide the desired level of protection.
In summary, the quarter-inch thick closed-cell spray foam insulation seen in the image is inadequate for maintaining thermal comfort and preventing moisture-related problems. See this HGTV site for more information.
