to 100 times it original size within the first 6 seconds of being applied. Icynene contains no ozone-depleting substances such as CFCs, HFC's, HCFC's. Icynene contains volatile organic compounds (VOCs). Icynene will not emit any harmful gases once cured. Icynene has a Global warming potential of 1. Flammability is relatively low. Icynene maintains its efficiency with no loss of R-Value for the life of the install. Icynene is more expensive compared to traditional insulation methods. Any potential for harm is primarily during the installation phase and particularly for installers. The manufacture of icynene involves many toxic petrochemicals. Sealection 500 spray foamR-3.8 (RSI-0.67) per inch. a water-blown low density spray polyurethane foam that uses water in a chemical reaction to create carbon dioxide and steam which expands the foam. Flame spread is 21 and smoke developed is 217 which makes it a Class I material (best fire rating). Disadvantages: Is an Isocyanate. Insulating concrete forms Insulating concrete forms (ICFs) are stay-in-place formwork made from insulating materials to build energy-efficient, cast-in-place, reinforced concrete walls. Rigid panels Rigid panel insulation, also known as continuous insulation can be made from foam plastics such as polyisocyanurate or polystyrene, or from fibrous materials such as fiberglass, rock and slag wool. Rigid panel continuous insulation is often used to provide a thermal break in the building envelope, thus reducing thermal bridging. Structural insulated panels Structural insulated panels (SIPs), also called stressed-skin walls, use the same concept as in foam-core external doors, but extend the concept to the entire house. They can be used for ceilings, floors, walls, and roofs. The panels usually consist of plywood, oriented strandboard, or drywall glued and sandwiched around a core consisting of expanded polystyrene, polyurethane, polyisocyanurate, compressed wheat straw, or epoxy. Epoxy is too expensive to use as an insulator on its own, but it has a high R-value (7 to 9), high strength, and good chemical and moisture resistance. SIPs come in various thicknesses. When building a house, they are glued together and secured with lumber. They provide the structural support, rather than the studs used in traditional framing. Advantages Strong. Able to bear loads, including external loads from precipitation and wind. Faster construction than stick-built house. Less lumber required. Insulate acoustically. Impermeable to moisture. Can truck prefabricated panels to construction site and assemble on site. Create shell of solid insulation around house, while reducing bypasses common with stick-frame construction. The