Insulation

Poly Iso, short for polyisocyanurate, is a rigid foam board insulation commonly used in commercial roofing and wall assemblies. It offers a high R value per inch and is often faced with foil or fiberglass, which can help with thermal performance and air control. Reclaimed Poly Iso boards are popular because they hold their shape well and are easy to reuse when edges and thickness are still intact.

XPS, or extruded polystyrene, is a rigid foam insulation known for its moisture resistance and consistent density. It’s commonly used below grade, in foundations, and in areas where insulation may see temperature swings or humidity. Used XPS insulation often comes from commercial projects or overbuys and can still perform well when stored and handled properly.

Some insulation types handle moisture better than others. Rigid foam boards like Poly Iso and XPS are more tolerant of brief moisture exposure, while fiberglass batts and rolls can lose performance if they get wet or compressed. Always check condition notes and photos to make sure the insulation fits your application.

Used insulation can be safe to reuse when it’s clean, dry, and structurally intact. The key is matching the material to the right project. Utility spaces, shops, retrofits, and non living areas are common uses. Always inspect reclaimed insulation and rely on confirmed dimensions and condition instead of assuming it performs like new.