Spray Foam Insulation Installation in Attic - Professional Application Guide #145528 (License: Personal Use)

A trained installer wearing a respirator, goggles, and protective clothing sprays expanding polyurethane foam directly onto the underside of roof sheathing between wooden rafters. The foam rapidly expands to fill gaps, creating an airtight thermal barrier that improves energy efficiency and reduces moisture infiltration. This method is ideal for unconditioned attics where traditional batt insulation may leave voids or settle over time.

Used on home improvement, HVAC, and construction websites to illustrate proper spray foam installation techniques; targets homeowners researching attic insulation upgrades or contractors seeking visual training aids.