Spray Foam 101: The Fundamentals

What spray foam actually is, how it cures, and where it belongs — the foundation everything else builds on.

We start with the two foam families: open-cell and closed-cell. You'll learn how each expands, what R-value really means, and why foam seals air and moisture in a way fiberglass can't.

Then we walk the building: attics, walls, rim joists, crawlspaces. You'll see where foam goes, where it doesn't, and how depth and foam choice change performance and cost.

We finish with the cure: chemistry, temperature, and the off-gas timeline so you know what's happening on install day and why the crew vents the space.

By the end you'll speak the language of spray foam and ask the right questions before anyone picks up a gun.