Polyiso Vs Xps Attic

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

Polyiso vs xps attic.

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. Polyiso is a thermoset material meaning it is permanently rigid and cannot be melted back to liquid form. Thermoset materials are generally stronger that thermoplastic due to the network of bonds and are better suited for high temperature applications. We always choose and recommend eps over xps due to the fact that xps has much higher greenhouse gas emissions than eps.

For mineral fiber board r values vary between supplier but are around r 4 0 inch significantly less than for polyiso. Xps is classified as a thermoplastic material. Another difference between the polyiso and xps insulation concerns ultraviolet light. In this video dow chemical rep kevin and i will tell you about the differences between.

Polyiso is classified as a thermoset material. The difference between polyiso eps xps foam insulation styrofoam. Some of the key attributes are shown here. There are a number of factors that are very important to the installer and building owner but are not part of the specifications.

I think there are two good choices for exterior rigid foam insulation. Polyiso is compatible with a large number of roof and wall systems too. Xps is degraded by uv light but the facers on polyiso insulation protect the core from such damage.