Polyiso Vs Xps Attic

Xps is a thermoplastic material which softens or turns to a liquid when heated.

Polyiso vs xps attic.

Xps is classified as a thermoplastic material. Polyiso is compatible with a large number of roof and wall systems too. A thermosetting plastic also known as thermoset is a polymer material that irreversibly cures. A thermosoftening plastic or thermoplastic is a polymer that softens or turns to a liquid when heated.

The difference between polyiso eps xps foam insulation styrofoam. In this video dow chemical rep kevin and i will tell you about the differences between. We always choose and recommend eps over xps due to the fact that xps has much higher greenhouse gas emissions than eps. Another difference between the polyiso and xps insulation concerns ultraviolet light.

I think there are two good choices for exterior rigid foam insulation. So if you are looking for suggestions we would say go for the eps and if you want added protection source one with a foil backing. Extruded polystyrene xps is somewhat lower than polyiso. Thermoset materials are generally stronger that thermoplastic due to the network of bonds and are better suited for high temperature applications.

Polyiso is a thermoset material meaning it is permanently rigid and cannot be melted back to liquid form. Polyiso is classified as a thermoset material. For mineral fiber board r values vary between supplier but are around r 4 0 inch significantly less than for polyiso.