This tool focuses specifically on Moisture Physics rather than just heat loss. It visualizes the “Dew Point”—the exact location inside your wall where warm, moist air turns into liquid water. It demonstrates why standard fiberglass batts often turn into wet sponges in tiny homes and how the “Flash Coat” method solves this by creating an air-tight, warm surface that stops condensation.
Flash Coat Mold Simulator
Visualize where condensation happens inside your walls.
1. Environment Conditions
Why Flash & Batt Works
Warm air carries moisture. Fiberglass allows air to pass right through it. When that warm interior air hits the freezing cold exterior sheathing, it condenses into water (like a cold soda can). Spray Foam creates an airtight seal against the sheathing, stopping the airflow completely.
1 inch of closed-cell foam provides about R-6.5. This insulation value keeps the inner surface of the foam warm enough (above the Dew Point) so that even if indoor air touches it, condensation cannot form. It moves the condensing surface to a safe temperature zone.