is drywall fireproof

Fire Rated Gypsum - CertainTeed | Home- is drywall fireproof ,Fire Rated Gypsum contains glass fiber reinforcement making it fire resistant. Find out all there is to know about CertainTeed fire rated gypsum here.hardibacker board fireproof? | Hearth.com Forums Home · hardibacker board fireproof? Posted By stovepipe?, ... fire resistant. I would think naively that the nylon would melt and the board would then just come apart.