If you're framing with 2x4s, you could go with a higher density insulation and get R-13 in the same space. SilveRboard acoustic is a do-it-yourself (DIY) nonstructural, rigid insulation board made from closed cell … 0.625-in x 48-in x 96-in SBGXS type1 R3 SilveRboard graphite radiant sheathing; SilveRboard graphite radiant sheathing meets not only the demands of the job site toughness but new 2016-17 codes both for R value and low air permeance (for external air barriers) with or without OSB sheathing Some builders working in cold climates give it an R-value of 4.5 or 5 … Insulation's R-value is a measure of its effectiveness, and a single 1-inch sheet of polyurethane foam gives you an R-value of 5.5 to 6.5, according to the U.S. Department of Energy. As we said before, the R-value measures the thermal resistance of a material. For instance if you have a material with an R-value of 12 attached to another material with an R-value of 3, then both materials combined have an R-value of 15. R-Panel is manufactured with a closed-cell polyisocyanurate foam core bonded to fiberglass-reinforced facers and designed for use over metal, nailable and non-nailable roof decks with a variety of membrane systems. R-values are additive. The R Value goes up as the temperature drops. Why GPS is Best in Class Insulation Source: ASTM C1512 Intertek Testing Services NA Ltd. Sustainability. Performance. Polyiso can’t be used under grade. Shop SilveRboard R-5 1-in x 4-ft x 10-ft SilveRboard acoustic Faced Polystyrene Foam Board Insulation with Sound Barrier in the Foam Board Insulation department at Lowe's.com. This highly effective combination of materials offers high compressive strength and great thermal performance when used in below grade and under slab applications. R-value Units. The floor is likely to cold to put polyiso on top of it. R-value loss for XPS insulation is directly related to the % of water absorption by volume XPS, Type X, 1.60 lb/ft3 GPS, Type I, 1.0 lb/ft3 Why GPS is Best in Class Insulation EPS, Type I, 1.0 lb/ft3 . SilveRboard Rigid Foam Insulation is a high performance flat-sheet insulation material made from Expanded Polystyrene (EPS) which is coated with a layer reflective lamination on both sides. SilveRboard® is a rigid insulation board made from Expanded Polystyrene (EPS) covered with a layer of polypropylene reflective lamination on both sides. Often a flame war it seem. 1- Per BSAF, 1#/cu.ft. Versatility. Expanded Polystyrene 2- The exact opposite is true for polyiso. I’m aware the exact R-value are a big debate. From what’s I’ve understood XPS outgasses and it’s R-value drops to that of EPS over time. eps has an r value of 3.85 AT 75 degrees F. Important for people living in the north, such as Minnesota, is that the r value at 0 degrees F is 4.55. This highly effective combination of materials offers a higher R-value per inch compared to traditional flat-sheet insulation as well as provides built-in moisture and air barriers which … Continued Factoring in the effect of all that lower R-value wood in a standard 2x4 wall (16" on center), the whole-wall R-value is about R-11, so that's our starting point. Because it’s old reclaimed material I use an R-value of 5. Also it is much more expensive. Johns Manville R-Panel ® rigid roof insulation board offers R-Values of up to R-23.6, providing high thermal efficiency. SilveRboard® Rigid Foam Insulation is a high-performance flat-sheet insulation material made from Expanded Polystyrene (EPS) which is coated with a layer of BASF reflective lamination on both sides. 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