Transcription of R-Value of Building Materials
1 MaterialR/ InchR/ Thick-nessInsulation MaterialsFiberglass Fiberglass Blown (attic) Fiberglass Blown (wall) Rock Wool Rock Wool Blown (attic) Rock Wool Blown (wall) Cellulose Blown (attic) Cellulose Blown (wall) Air-entrained Urea terpolymer Rigid fiberglass (> 4 lb/ft3) Expanded Polystyrene (bead-board) Extruded Polyurethane (foamed-in-place) Polyisocyanurate (foil-faced) Construction MaterialsConcrete Block 4 inch Block 8 inch Block 12 inch 4 inch common 4 inch face Soft Wood 2 inch nominal (1 inch) 2 x 4 (3 inch) 2 x 6 (5 inch) Logs and Sheathing inch inch inch inch inch inch inch of Building MaterialsMaterialR/ InchR/ Thick-nessFiberglass ( inch) (1 inch) (1 inch) Polystyrene ( inch) (1 inch) (1 inch) Polyisocyanurate ( inch) (1 inch) (1 inch) MaterialsHardboard ( inch) ( inch) ( inch) Bevel Lapped , Steel, Vinyl (hollow backed) (w/ inch Insulating board) 4 inch Finish MaterialsGypsum Board (drywall inch) ( inch) ( inch) ( inch) Board (underlayment) ( inch) ( inch) , Linoleum (fibrous pad)
2 (rubber pad) MaterialsAsphalt Shingles Shingles Glass w/storm insulating glass ( inch) air space ( inch air space) 1 ( inch air space) ( inch air space) ( inch w/ low-E ) (w/ suspended film) (w/ 2 suspended films) (w/ suspended film and low-E) insulating glass ( inch air spaces) ( inch air spaces) for tight fitting drapes or shades, or closed blinds Hollow Core Flush (1 inch) Solid Core Flush (1 inch) Solid Core Flush (2 inch) Panel Door w/ inch Panels (1 inch) Door (wood 50% glass) (metal) Insulating (2 inch w/ urethane) FilmsInterior Ceiling Wall Spaces inch to 4 inch approximately
