What is Polyurethane Foam Insulation?

What is Polyurethane Foam Insulation?

Polyurethane is used in many household items from the stuffing in some pillows, the wheels on your skateboard to the Spandex worn in sports clothes. It is also used extensively in the insulation business mainly used in the form of insulated slabs or boards.

Organic polymers that are used to make foam insulation are specifically designed with their end-use in mind. To create polyurethane foam in sprayable form, the polymer reacts with isocyanide at the top of the spray gun and forms the insulation material in an exothermic reaction.


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Polyurethane is a polymer composed of organic units joined by carbamate (urethane) links. Wiki

The polymer used to insulate a shed will, when applied create a dense rigid coating while the polymer used to insulate your attic will expand and form a spongy material that allows it to ‘breathe’.

What are the types of Polyurethane foam?

There are 2 main types of Polyurethane foam used in insulation, open cell spray foam and closed cell spray foam.

attic insulation slide

Open Cell Polyurethane Foam

shed insulation 3

Closed Cell Polyurethane Foam


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