I'm thinking in the context of building a roof deck with rigid insulation. While fiber glass insulation can be compressed below labeled thickness and still achieve Grade I installation, manufacturers’ instructions specify … Say there are extra beefy steel beams holding up the decking, but the decking was only sized for a 35 psf snow load - not enough for the 60 psf required … Similarly referring to ASTM C578 (Specification for Rigid Cellular Polystyrene Thermal Insulation) while selecting your below-grade insulation products, not only helps you design the right product for the job, but also helps avoids unnecessary costs associated with over engineering. Pour-in-place insulation Spray insulation polyol blends Compatible with polyester and polyether polyol formulations, the surfactants simplify the mixing of polyols and blowing agents, maintain the blowing agents in the emulsion or solution, and provide excellent emulsion stability. FOAMULAR® 400-600-1000 High Compressive Strength Rigid Foam Insulation Product Data Sheet (467 KB, PDF) Technical Bulletins. All insulation shall be installed to meet Residential Energy Services Network (RESNET) Grade I standard. Exception: RESNET Grade II is acceptable for cavity insulation in exterior walls that include continuous rigid insulating sheathing and/or insulated siding with a minimum R -value of 5, and rim joists.” 2018 IECC Code: High Compressive Strength Rigid Foam Insulation Description Owens Corning FOAMULAR 400/600/1000 extruded polystyrene insulation is a high density insulation designed for use in engineered applications requiring additional load-bearing capability. Product Description. Fiber glass insulation manufacturers design batts to fit standard wood and metal framing sizes. Please call for shipping quotes for orders over 4 packs.. IMO insulation is designed to entrap air so the more it's compressed the less air it contains and you end up relying on the conductivity of the material (fiberglass) itself. Insulation cork is a 100% natural, renewable, recyclable, and biodegradable product made from the outer bark of an oak tree. It is comprised of an extruded polystyrene closed-cell foam … I need some advice! Rigid board appears to come in compressive strengths from 150 psi up to 1000 psi. I cannot get a straight answer from the flooring company. Resistant XPS Insulation ASTM C 578 Type IV, 25 psi minimum Description Owens Corning ™ FOAMULAR® 250 extruded polystyrene (XPS) insulation is a closed cell, moisture-resistant rigid foam board well suited to meet the needs for a wide variety of building applications. Insulation R-Values When Compressed In Framing Cavity2 I joist 14" 49 I joist 11-7/8" 44 38 2 x 12 11-¼ " 42 37 I joist 9-½ " 38 33 2 x 10 9-¼ " 37 32 35 30 2 x 8 7-¼ " 27 29 25 27 24 2 x 63 6" 22 24 21 21 2 x 6 5-½ " … Standard Grade ThermaCork. We are putting 1" XPS or EPS down first to keep the floors warmer (and also hopefully help with condensing). ASTM C578 Types and Physical Properties for FOAMULAR® XPS (106 KB, PDF) FOAMULAR® Extruded Polystyrene Insulation For Cold Storage Applications Technical Guide (884 KB, PDF) FOAMULAR ® 250 XPS insulation is ideal for many … I am installing Mannington Restoration laminate in our walk-out basement. FOAMULAR® 250 2 in x 2 ft x 8 ft R-10 Tongue & Groove Edge Insulation Sheathing $16.72 As low as $15.47/board FOAMULAR® 600 2 in x 4 ft x 8 ft R-10 Squared Edge Insulation Sheathing $64.06 However, there may be times when insulation is compressed to fit specific needs.