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SPF engineering, explained

Practical, technical guides for architects, contractors, and developers working with spray polyurethane foam — building science, code compliance, and forensic investigation.

When to Bring in an SPF Engineering Consultant

Featured Guide

August 13, 2026 7 min read

When to Bring in an SPF Engineering Consultant

Spray polyurethane foam is a chemically precise, code-regulated building material — not just an insulation product. Here's when an independent engineering opinion is worth the fee.

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Common Causes of SPF Installation Failure: A Forensic View

Forensic Investigation

8 min read

Common Causes of SPF Installation Failure: A Forensic View

Most spray foam failures trace back to one of four recognizable mechanisms — and telling them apart is the first job of a forensic investigation.

Vapor Barrier Strategy for Spray Foam, by Climate Zone

Building Science

7 min read

Vapor Barrier Strategy for Spray Foam, by Climate Zone

The right vapor-retarder strategy for an SPF assembly depends on climate zone, foam type, and which direction moisture is actually driving — not a one-size-fits-all rule.

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