rigid foam

Hard cellular plastic

Rigid foam is a type of insulation or structural material that holds its shape, unlike flexible foams that compress and spring back.

Made from polystyrene, polyurethane, or similar polymers, it comes in boards or panels used in construction for thermal insulation: We installed rigid foam beneath the siding.

The term distinguishes it from soft foams used in cushions or mattresses.

Related

building insulation · flotation devices · R-value · EPS · soundproofing · packing material · set designer · recyclability · density · white · stiff · sheets · thermal · panels · blocks · building · molded · foams

Categories
Opposites
material composition

rigid foamfiberglass

Reinforced woven strand composite

mineral wool · rock wool · wool insulation · fiberglass insulation

installation method

rigid foammemory foam

Heat-responsive conforming cushion

spray foam

Family

foam, rigid

Familiarity
Top 500,000
Profile
Used worldwide · Timeless · Concrete · Rated G