VERT / GREEN
Foam fully within an approved assembly with intact interior finish: keep product/assembly documentation.
Verify how rigid or spray foam must be protected from the interior based on assembly, use and applicable code edition.
Foam fully within an approved assembly with intact interior finish: keep product/assembly documentation.
Basement, attic, service room or renovation leaves foam exposed: verify applicable thermal/ignition barrier requirements.
Do not generalize one gypsum thickness or exception across all products/assemblies/jurisdictions.
Sources checked: 2026-08-22. Confirm local rules and the applicable edition.
These links connect this page to the next useful checks and decisions without repeating the full content.
V14 connects envelope, air, fire, structure, water and code instead of treating each project in isolation.
V15 covers issues that can block a project, cause a loss or become expensive once concealed.
V17 completes gas, soil, water, fire, climate and structural interfaces.
V19 covers interfaces that become important when multiple home systems interact.
V26 connects systems that cross utility, plumbing, HVAC, envelope and metering boundaries.
V28 connects small details that become costly once finishes are closed.
V32 connects contamination, storm damage, legacy materials and recommissioning before rebuilding.