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  • The Truth About Spray Foam: A Homeowner’s Guide
July 8, 2025

The Truth About Spray Foam: A Homeowner’s Guide

The Truth About Spray Foam: A Homeowner’s Guide

by Iain Gors / Tuesday, 09 January 2024 / Published in Environmental Consulting, General Contracting, Green Building Consulting, Healthy Building Inspections & Testing, Industrial Hygiene, Insulation, News

Today, we’re diving deep into the world of spray foam insulation—unveiling its secrets, both good and ugly. From harmful chemicals to moisture traps and inspection challenges, let’s explore the ins and outs of spray foam to empower you to make informed decisions for your home.

The Two Faces of Spray Foam:

Closed Cell vs. Open Cell Spray foam comes in two main types: closed cell and open cell. Closed cell spray foam provides a tight seal, but here’s the catch—it can double as a vapor barrier. This means it has the potential to trap moisture, leading to damage within your home’s structure. On the flip side, open-cell spray foam offers better breathability and moisture management, making it a healthier choice for your home.

Harmful Chemicals Lurking in Spray Foam:

While seeking energy-efficient insulation, it’s crucial to be aware of the chemicals hiding in some spray foams. Harmful substances may be present, impacting indoor air quality and posing health risks for your family. Opting for eco-friendly spray foam ensures that you’re not only making your home more efficient but also creating a safe environment for everyone inside. Many spray foams begin off-gassing harmful chemicals during installation and last for a lifetime. YIKES!

The Costly Reality of Moisture Damage

Closed cell spray foam’s potential to act as a vapor barrier can lead to costly repairs. Moisture damage within the walls can compromise your home’s structural integrity and result in unexpected expenses. Choosing open-cell spray foam can help mitigate these risks, offering a balance between insulation effectiveness and moisture control.

The Camouflage Effect: Imperfections and Inspections

Some builders use spray foam to mask imperfections during construction. While this may create a smooth finish, it can make inspections challenging. The opaque nature of spray foam obstructs the view of what’s behind it, potentially hiding issues that would otherwise be detected during inspections. Transparency is key to maintaining accountability in the building process.

Conclusion:

As stewards of our homes, it’s essential to be well-informed about the materials we choose. Spray foam insulation has its advantages, but understanding the potential pitfalls is crucial for a truly healthy home. Opting for open-cell spray foam, prioritizing eco-friendly options, and staying vigilant during inspections can help you build a home that not only stands strong but also promotes the well-being of your family. Remember, a healthy home is a happy home. Stay informed, stay empowered!

Healthy Building Science

About Iain Gors

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