High R-Value (2.9 R): Has more than two times the R-value of wood fiber and more than four times the R-value of gypsum boards. User Friendly: Allows easy and efficient scoring, cutting and snapping which permits fast, tight fabrication and all in a low dust environment.
[30] Divide this per inch numberby 2 to obtain the R-value for 1/2" medium density fiberboard = R 1.22. Fiberboard insulating sheathing, regular density, per inch: 2.64 30 : Questionable; [30] Divide this per inch number by 2 to obtain the R-value for 1/2" regular density fiberboard = R 1.32 Feb 06, 2013 · R-value is a measurement of thermal resistance and measures the ability of heat to transfer from one side of an object to another. As a benchmark, one inch of solid wood has an R-value of 1. In comparison, an inch of blown fiberglass insulation has an R-value of 3.1 - 3.4 and an inch of blown cellulose in an attic has an R-value of 3.2 - 3.7 Polyiso has a high R-value per inch compared to other insulation products. Polyiso is unique in that the R-value increases with the thickness of the foam, so three inches of polyiso has a higher R-value per inch than two inches. The R-value for FOAMULAR® XPS insulation is provided from testing at two mean temperatures, 40ºF and 75ºF, and from two aging (conditioning) techniques, 180 day realtime aged (as mandated by ASTM C578) and a method of accelerated aging sometimes called “Long Term Thermal Resistance” (LTTR) per CAN/ULC S770-03. The R-value at 180 day real Just a note on some of the information on this thread. Celotex manufactuers all the product mentioned above fiberboard sheathings and polyiso sheating Thermax and Tuff R. The poly iso board are R 7.2 per inch stabilized R value. I believe NAHB web site has info on the testing. •Falls in the middle of the three types of rigid-foam insulation in both cost and R-value •Used most in walls or below grade applications •Recyclable, and at about R-5 per inch, costs around 42¢ per sq. ft. for a 1-in.-thick 4×8 panel •Comes unfaced or with a number of different plastic facings
Feb 06, 2013 · R-value is a measurement of thermal resistance and measures the ability of heat to transfer from one side of an object to another. As a benchmark, one inch of solid wood has an R-value of 1. In comparison, an inch of blown fiberglass insulation has an R-value of 3.1 - 3.4 and an inch of blown cellulose in an attic has an R-value of 3.2 - 3.7
*R = thickness – thermal conductivity (R = t ). R-Value is a measure of insulating ability. “R” means resistance to heat flow. The higher the R-Value, the greater insulation power. **VersaBoard® 35 minimum thickness is 1½”. ***VersaBoard® 80 is not available in a thickness of 6 ½” or 7”. k iimum 70% eccled Cotet High R-Value (2.9 R): Has more than two times the R-value of wood fiber and more than four times the R-value of gypsum boards. User Friendly: Allows easy and efficient scoring, cutting and snapping which permits fast, tight fabrication and all in a low dust environment. Key differences are R-value per inch, water resistance, compressive strength, permeability to water vapor, facings, and of course, cost. All foam insulation products are petroleum-derived. Rigid foam sheets are sold in several thicknesses; most lumberyards carry insulation ranging from 1/2 in. to 2 in. thick. R Value. 4.1-5 (6) 9.1-10 (5) 3.1-4 (4) 7.1-8 (4) 2.1-3 (3) 10.1-15 (2) 15.1-20 (1) 5.1-6 (1) Sound Barrier. Yes (21) No (8) 48-inch x 96-inch x 1.5-inch Ship Lap
Products with a higher R-value have a higher cost but have an increased capacity to resist heat flow, and therefore provide greater insulation. Each type comes with unique advantages: • Expanded Polystyrene. Also called Styrofoam insulation, this is the least expensive material. It provides R-values that range from 3.6 to 4.2 per inch.
A medium-density batt offers R-13 for the same space. High-density batts for a 2 by 6 inch (51 by 152 mm) frame wall offer R-21, and high-density batts for an 8.5-inch (216-mm) spaces yield about an R-30 value. R-38 batts for 12-inch (304-mm) spaces are also available. per CAN/ULC S770-03. The R-value at 180 day real-time age and 75ºF mean temperature is commonly used to compare products and is the value printed on the product. 5. Values at yield or 10% deflection, whichever occurs first. 6. Value at yield or 5%, whichever occurs first. 7. Data ranges from 0.00 to value shown due to the level of precision of R-values help homeowners decide which type of insulation material to use, and in what thickness. An R-value is a measure of a given material’s thermal resistance, or its ability to inhibit warm Various Insulation Material Thermal Conductivity Chart R-values per inch given in SI and Imperial units (Typical values are approximations, based on the average of available results. Johns Manville AP™ Foil-Faced Foam Sheathing Board is rigid polyisocyanurate foam sheathing that provides exceptional heat, moisture, and air control to protect your building's exterior walls, and when installed correctly, eliminates all major thermal bridges that cause heat loss. Continuous exterior sheathing required per building codes in many states.