How-To

The contractor matters as much as the foam. Use this checklist to pick a reliable US pro. Before you hire Confirm licensing, insurance, and manufacturer certification Look for SPFA (Spray Polyurethane Foam Alliance) affiliation Get at least three itemized quotes Read recent reviews and ask for local references Get warranties and guarantees in writing Red…

DIY spray foam kits let you seal small areas yourself, but they have limits. Good for Sealing gaps, small cavities, rim joists, around pipes and wiring, and minor air sealing. Kits are sold by board feet (roughly 15–600 bd ft). Not good for Whole attics, walls, or crawl spaces. Large jobs need temperature control, correct…