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Insulating Sheathing

Non-structural insulating board products with varying R-values and a wide variation in vapor permeability and drainage characteristics. Materials include expanded polystyrene (EPS), extruded polystyrene (XPS), polyisocyanurate (most often foil-faced), rigid fiberglass, and mineral wool.

Variants: insulated sheathing

Related terms: Expanded Polystyrene Insulation, Extruded Polystyrene Insulation, Polyisocyanurate

Related resources: Guide to Insulating Sheathing, IRC FAQ: Cladding Attachment Over Insulating Sheathing, CP-0604: Incorporating Insulating Sheathing into the Design of the Thermal and Moisture Management System of the Building Enclosure