Laserfiche WebLink
GUIDELINE TO (R) FACTORS FROM ASHRAE MANUAL <br /> OF TYPICALLY USED PRODUCTS <br /> AIR FILMS � SHEATHING � <br /> Interior Air Film (Walls) 0.68 3/4" Wood Subfloor or Sheathing 0.94 <br /> Exterior Air Film (Walls 0.17 1/2" Plywood Sheathing 0.62 <br /> Interior Air Film (Vented Ceiling) 0.61 1/2" Particle Board 0.66 <br /> Exterior Air Film(Vented Ceiling) 0.61 Gypsum or Plaster Board 3/8" 0.32 <br /> Interior Air Film (Non Vented) 0.61 Gypsum or Plaster Board 1/2" 0.45 <br /> Exterior Air Film (Non Vented) 0.17 Gypsum or Plaster Board 5/8" 0.56 <br /> Plywood 3/8" 0.47 <br /> BLOWING WOOLS Plywood 1/2" 0.62 <br /> Approx. 3" 9.00 Plywood 3/4" 0.93 <br /> Approx. 4 1/2" 13.00 Sheathing, Reg. Density 1/2" 1.32 <br /> Approx. 6 1/4" 19.00 Sheathing, Reg. Density 25/32" 2.06 <br /> Approx. 7 1/4" 24.00 Nail-Base Sheathing 1/2" 1.14 <br /> Approx. 14" 30.00 <br /> Approx. 18" 40.00 ROOFS <br /> All other insulation materials Built-up Roofs 0.33 <br /> must be verified (R Factor) Asbestos-Cement Shingles 0.21 <br /> Asphalt Roll Roofing 0.13 <br /> INSULATION Asphalt Shingles 0.44 <br /> Insulation: 2-2 3/4" Fiberglass 7.00 <br /> Insulation: 3 1/2" Fiberglass 11.00 SIDING <br /> Insulation" 6" Fiberglass 19.00 Aluminum Siding 0.61 <br /> Insulation: 3 5/8: Fiberglass 13.00 Aluminum with Backer 1.82 <br /> Insulation: 9" Fiberglass 30.00 Aluminum with Backer & Foiled 2.96 <br /> Insulation: 12" Fiberglass 38.00 1/2 x 8 Lap Siding (Wood) 0.81 <br /> Insulation: 8" Cellulose 29.00 7/16 x 12 Hardboard Siding 0.67 <br /> Insulation: 10" Ceilulose 37.00 Asbestos Sidings 1/4 Lapped 0.21 <br /> Insulation: 12" Cellulose 44.00 Stucco (Brown and Finish Coat) ---- <br /> Insulation: 1 1/2" Therma�c 12.00 <br /> Insulation: 2" ThermaJc 16.00 DOORS � <br /> 1 3/4" Solid Core Door .46 <br /> WOODS w/Storm, Wood .31 <br /> Fir, Pine & Similar Soft Woods w/Storm, Metal •26 <br /> 1 1/2" 1.89 Pease Steel Door Insl/N/GL 7.45R .13 <br /> 2 1/2�� 3.12 Sliding Glass Door, Wood .65 <br /> 3 1/2" 4.35 Metal •72 <br /> 5 1/2" 6.87 <br /> WINDOWS <br /> CONCRETE BLOCK All Windows <br /> 8" Concrete Block (S & G Reg.) 1.11 (w/Storms 1" to 4" Space) .56 <br /> (Filled with Vernuculite) 1.93 Removal Double Glazing (RDG) .55 <br /> 12" Concrete Block (S & G Reg.) 1.28 Thermo or Welded 3/16"Air Space .69 <br /> (Filled with Vemuculite) 3.15 1/4" Air Space .65 <br /> 8" Light Weight 2.18 1/2" Air Space •58 <br /> (Filled with Vemuculite7 5.03 (Other windows specifically tested <br /> 12" Light Weight 2.48 can use better ratings) <br /> (Filled with Vermiculite) 5.82 <br /> 20 <br />