A magnesium oxide underlayment panel that reaches a one hour fire resistance rated floor assembly over an existing wood structural deck, without a poured gypsum underlayment.
When the structural deck is already plywood or OSB and the assembly still has to carry a one hour rating, the usual answer is a poured gypsum underlayment. That answer brings a specialized crew, a pump truck, a cure window, and a weather dependency onto a schedule that has none of those problems anywhere else. InfernoBloc installs dry with the crew on site, at two and a half pounds per square foot, and the next trade follows the same day.
Installs directly over plywood, OSB, and magnesium oxide subflooring with standard carpentry tools.
Provides a stable substrate for a wide range of finished flooring materials.
This panel is named in the following published fire rated floor and ceiling assembly.
L587 requires a single layer of ceiling gypsum. On a repeating floor plate, the second layer runs the full ceiling plane on every level, so a single layer design is a real difference in a takeoff.
See the full assembly index
Multifamily construction. Modular and offsite construction. Hospitality and senior living.
One hour fire rated assembly. Moisture resistant. Mold resistant. Termite resistant.
Send us the deck type and the required rating and we will confirm the assembly.