RenoAtlas

Foam-plastic insulation: thermal and fire protection

Verify how rigid or spray foam must be protected from the interior based on assembly, use and applicable code edition.

VERT / GREEN

Foam fully within an approved assembly with intact interior finish: keep product/assembly documentation.

JAUNE / YELLOW

Basement, attic, service room or renovation leaves foam exposed: verify applicable thermal/ignition barrier requirements.

ROUGE / RED

Do not generalize one gypsum thickness or exception across all products/assemblies/jurisdictions.

Construction triage

What the professional checks

Official sources

Sources checked: 2026-08-22. Confirm local rules and the applicable edition.