The Science

Spray Foam, Explained Accurately

Seven in-depth topics covering the chemistry, physics, and code science behind spray foam insulation — including the parts marketing usually skips.

Open-Cell vs. Closed-Cell Chemistry

The polyurethane chemistry that separates open-cell and closed-cell spray foam, and what it actually means for performance.

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R-Value & Real-World Thermal Performance

How spray foam's R-value is measured, why lab and field numbers diverge, and what actually drives thermal performance in a real assembly.

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Why Spray Foam Becomes a “Red Flag” — The Reputation Science

The building-science reasons some spray foam jobs turn into resale, insurance, and mold problems — and why it almost always traces back to installation, not the material.

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Off-Ratio & Improper Cure Science

What happens chemically when spray foam is mixed off-ratio, how it causes shrinkage and odor complaints, and how proper application prevents it.

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Moisture & Vapor Barrier Physics

How spray foam interacts with moisture and vapor drive in a wall or roof assembly, and where it can trap water if installed wrong.

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DIY Kits vs. Professional Application

Why ratio control and application equipment — not the chemistry itself — is what a small DIY kit usually can't replicate.

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Fire & Code Compliance Science

The ignition-barrier and thermal-barrier code requirements that govern where and how spray foam can be installed.

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