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 | Sitemap

This web site is not endorsed by, directly affiliated with, maintained, authorized, or sponsored by Raynor Manufacturing Co. of Dixon, Illinois or its Raynor trademark. All product and trade names are the registered trademarks of their original owners. The use of any trade name or trademark is for identification and reference purposes only and does not imply any association with the trademark holder of their product brand.