Why fibers melt instead of burn Why carpet fibers melt instead of catching fire
Most residential carpet in St. George is nylon, polyester, or olefin, and all three melt and shrink away from heat rather than catching fire and spreading. Nylon and polyester leave a hard, shiny bead where the fiber tips fuse together, while olefin tends to self-extinguish once the heat source is removed.
That melting behavior is actually good news for repair. A melted clump of fiber tips can often be trimmed level with the surrounding pile, or replaced fiber by fiber with a small transplant, instead of requiring a hole to be cut out.
Larger burns that melted through to the backing need a different repair than a fiber trim, since patching in a matched section of carpet is the only way to get a durable result once the melt goes that deep.