Expanding Foam Accidents During Fire Door Installation: What Can Go Wrong

Expanding foam is useful on building sites, but when a can, nozzle or applicator goes wrong, the result can be surprisingly difficult to control. This is a real-world guide to what can happen when expanding foam gets somewhere it should not, how to deal with the immediate problem, and why prevention matters around finished fire doors and building surfaces. How a small foam accident can become a big problem Expanding polyurethane foam does not stay the size it comes out of the nozzle. It expands after application, and the reaction can continue after the first application. Manufacturers give specific application and curing instructions for their products. That makes an accident with a damaged can, blocked nozzle, failed applicator or uncontrolled discharge very different from simply dropping a tube of sealant. The fire-door installation accident One of the easiest mistakes to…