How thick does spray foam need to be for a given R-value?

Required thickness depends on the foam type (open-cell vs. closed-cell) and the target R-value for your climate zone and application — we document what was actually applied and compare it to what was specified for your project.

Spray Foam Thickness Testing | Spray Foam Testing Services

A $15 depth gauge tells you how deep the foam is at one spot — it doesn't tell you whether the install meets spec across the whole space, or whether the foam cured correctly. Our thickness testing samples multiple locations, documents each measurement against the specified R-value, and produces a written record you can rely on.

What We Check

Depth measurement at multiple sampled locations, not a single spot check
Comparison against the specified or advertised R-value for the application
Consistency of coverage across the treated area
Documentation of any under-thickness zones with photos and measurements
Written report suitable for a homeowner, buyer, or contractor's records

Who This Is For

Homeowners who suspect their install came in thinner than what was quoted
Buyers who want to verify a seller's insulation claims before closing
Contractors who want independent sign-off on completed work

Frequently Asked Questions

A depth gauge measures one point. Our process samples multiple locations, documents each one with photos, and compares the results against the specified R-value in a written report — the kind of documentation a single gauge reading can't provide on its own.

Spray Foam Thickness Testing

What We Check

Who This Is For

Frequently Asked Questions

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