Are polyurethane and white styrofoam the same?

Not quite

For equivalent thicknesses, polyurethane has a higher thermal insulation factor (R‑16 or RSI: 2.8) than expanded or extruded polystyrene (Styrofoam).

In addition, since polyurethane strongly adheres to door surfaces, it provides twice as much resistance to flexion as polystyrene in a comparable door.

Remember, entrance doors are also insulated by injecting polyurethane foam. Polystyrene, for instance, is the material used to make coffee cups for protection in packaging.

Insulate Polyurethane
Polyurethane 
Insulate Styrofoam
Styrofoam
Back to FAQ

Copyright Garaga Inc. | Privacy Policy and Conditions of Use | Site Map