Plaster is more fire resistant than drywall. While plaster walls are smooth and flat, they contain slight surface trowel marks, adding a desirable Old World feel to the character of a home.

Is plaster fire resistant?

Lath and plaster are fire resistant and are usually used in ceilings to prevent fire spread. In the case of fire, the longer the plastered ceiling remains in place, the greater the fire will be prevented to spread between floor levels.

Are plaster walls good insulators?

Plaster is a Better Insulator Than Drywall Yes, your plaster walls likely have little to no insulation behind them, but the wall covering itself has an R-value twice that of drywall.