Transcription of R-Value of Building Materials
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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 La
R-Value of Building Materials Material R/ Inch R/ Thick-ness Fiberglass ( ⁄₄ inch) 3.00 (1 inch) 4.00 ⁄₂ inch) 6.00 Extruded Polystyrene ( ⁄₄ inch) 3.75 (1 inch) 5.00 (1 ⁄₂ inch) 7.50 Foil-faced Polyisocyanurate ( ⁄₄ inch) 5.40 (1 inch) 7.20 (1 ⁄₂ inch) 10.80 Siding Materials Hardboard ( ⁄₂ …
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