The raw material is heated in special machines called pre-expanders with steam at temperatures of between 80-100C. It is a lightweight, rigid and closed cell insulation. The R-value is the building industry term for thermal resistance "per unit area." It is usually white and made of pre-expanded polystyrene beads. It is sometimes denoted RSI-value if the SI (metric) ... the lower the k-value, the better the material is for insulation. The range in densities and compressive strengths allows for specific uses on different parts of a building. Expanded polystyrene – Made from expanded foam beads that are molded into shape, expanded polystyrene or EPS is ideal for above-grade applications such as exterior walls and offers an R-value of 3.6 to 4.2 per inch. The thermal performance of extruded and expanded polystyrene (XPS and EPS) insulation under roads and airfields in cold climates is critical to protect infrastructure from damage caused by permafrost thaw, frost heave, and seasonal thaw weakening. The higher the R-value of your area, the more insulation will need to be installed. R-value is a measure of a material’s resistance to heat transfer. R-value means the resistance to heat flow. R value of 50mm Celotex is 2.25. The higher the R-value, the higher the insulating effect. Expanded polystyrene (EPS) is a rigid and tough, closed-cell foam with a normal density range of 11 to 32 kg/m 3. Other types of insulations use diffusive gasses to help increase their R-values. Expanded polystyrene (EPS) ... and R-value. Expanded polystyrene is a type of foam made from polystyrene. Expanded Polystyrene (EPS): Ultimate Guide on Foam Insulation Material For several years, expanded polystyrene (EPS) has been utilized as a material of choice in several food packaging applications, cost-effective and energy-efficient insulation in construction applications as well as cushion transport packaging material for shock sensitive goods and many more. However, EPS is also used in the construction industry as an insulating material and can be made in different densities and even with thermal enhancing graphite to provide a cost effective insulation material. The higher the density of the product, then the higher the R-value will be. 2 lb nominal density EPS (expanded polystyrene) has become a very popular alternative to extruded polystyrene for under slab and perimeter foundation wall insulation. Extruded Polystyrene Insulation (XPS) is a high-performance, closed-cell rigid insulation. It is a lightweight, rigid, plastic foam insulating material produced from solid beads of polystyrene. Polystyrene Product Company Is A Leading National Supplier Of Polystyrene Insulation, Wall Insulation, Floor Insulation, Ceiling & Concrete Roof Insulation … Available in standard widths or cut to specific sizes, EXPOL expanded polystyrene insulation boards are fast to install without compromising on quality. Building insulation properties of fiberglass insulation, expanded polystyrene insulation, foil-faced polyisocyanurate insulation, and extruded polystyrene The table of insulation properties at page top and accompanying text are reprinted/adapted/excerpted with permission from Solar Age Magazine - … The density of the material falls from some 630kg/m3 to values of between 10 and 35kg/m3. Wickes supply 50mmx1200mmx2400mm polystyrene @ £14-56 per sheet (2.16KG per board average density) It's great for above or below grade applications and easy to cut with a utility knife or hot wire. Moisture. Expanded polystyrene has superior thermal properties that is quantified through its “R-value”, or thermal resistance, which is an approximate measurement of how much the material impedes the transfer of heat. EPS R-Value Thermal Performance. When you compare EPS and XPS insulation at the same R-values, EPS insulation can be between 10 to 30 percent less expensive and costs about 19 cents per sq. Expanded polystyrene (EPS) has a k-value of around 0.033 W/(m⋅K). Styroboard EPS from Foamex is a highly versatile expanded polystyrene sheet solution ideal for the building and construction industries. Rigid, yet lightweight, EXPOL expanded polystyrene (EPS) boards are easy to store, easy to move around site, and most importantly, easy to place in wall cavities. Introduction . These gasses tend to escape out eventually lower their R-Value. The focus is on the insulating or R-value performance of expanded polystyrene (EPS) and extruded polystyrene (XPS) foam products used in long-term building applications. Expanded Polystyrene (EPS) Insulation is a rigid closed cell plastic foam that is comprised of hollow, spherical beads that are fused together using steam. Additional benefits, such as design flexibility, resistance to moisture and high R-value, make ACH's EPS roof insulation the preferred roofing solution among contractors, architects and engineers. Polystyrene insulation is manufactured in a variety of board sizes – usually a minimum of 1-inch thick. Expanded Polystyrene insulation like PolyFloor, PolyWall & PolyRoof have a K-Value of 0.035 R-Value Calculations Thermal R-Values are calculated the dividing the thickness of the material (in meters) by the K-Value of the material. In comparison to Polyisocyanurate and Extruded Polystyrene, ACH Direct-to-Deck Expanded Polystyrene (EPS) has lower cost per R-value. … Prior to installation, you will need to know the recommended R-value for your area, in order to effectively help prevent heat transfer. Extruded Polystyrene Insulation XPS. EPS insulation (0.90 pcf) provides a typical R-value of 3.60 per inch at a mean temperature of 75 degrees F and a typical R-value of 4.00 per inch at a mean temperature of 40° degrees F. by volume). Material costs are about &0.31 per square foot for each inch of thickness, plus installation costs. It is extremely lightweight, but strong and durable. Expanded Polystyrene – EPS. The 2 lb EPS is available in any thickness, not just 1″ increments and is more economical than extruded polystyrene. It has to be noted that over 7-10 years Celotex will drop in R-value to match the polystyrene as polystyrene will not drop. A 50 year R-value is a more suitable long-term R-value for use in building design. Installed correctly without damage it will not deteriorate with age and will deliver constant R values for the life of the building. Expanded polystyrene is made from expandable polystyrene, which is a rigid cellular plastic containing an expansion agent. The R-value refers to a material’s ability to resist heat flow. EPS is made of 98% trapped air and only 2% plastic, making it an efficient insulator with a small amount of raw material. It has the same 25 psi compression strength as extruded polystyrene. Insulfoam is a division of Carlisle Construction Materials, a wholly owned subsidiary of Carlisle Companies (NYSE: CSL), and is the nation's largest manufacturer of block-molded expanded polystyrene (EPS). The EPS beads are expanded and finally molded into larger EPS blocks which are further used for walls, roofs, floors, crawl spaces.. ... “Expanded polystyrene (EPS) rigid foam insulation was tested in accordance with ASTM C1338 “Standard Test Method for Determining Fungi Resistance of Insulation Materials and Facings” which is used to evaluate the ability of new insulation materials to support five types of fungal growth. Long Term ‘R’ Value. Expanded Polystyrene (EPS) is manufactured in a way where 98% of the product is enclosed in small chamber filled up with regular air. Expanded polystyrene (EPS) has an R-value between 3.6 to 4.2 per inch. When it comes to R-value, our polystyrene sheets outperform materials such as weatherboards, plasterboards, concrete slabs, fibre cement sheets and more. It is dependent upon the thickness and density of the building material. 50 year R-value be used for insulation specifications. For over 50 years, Insulfoam has been enabling building professionals to construct high-quality building insulation systems at a minimal cost. The 50 year R-value can easily be determined using the existing protocol described in ASTM C1303 or CAN/ ULC-S770. Versatility EPS can be manufactured into almost any shape or size, and can easily be cut or shaped when required to suit any application. POLYURETHANE HAS AN R-VALUE as high as R-7 and as low as R-8 / INCH. The higher the R-value, the greater the material’s ability to resist conductive heat transfer and the better its performance as an insulating material. Expanded polystyrene, or EPS geofoam, is a cost-efficient insulation material used in the construction industry. The higher the R-value, the greater the resistance to heat flow. Foamex expanded Polystyrene’s cellular structure means it is stable and will not settle. It is Buy Polystyrene Insulation Or Styrofoam Insulation Sheets Or Boards For Floor Insulation, Wall Insulation & Roof Insulation. Generally, polystyrene is a synthetic aromatic polymer made from the monomer styrene, which is derived from benzene and ethylene, both petroleum products.Polystyrene can be solid or foamed. The thicker the sheet of EPS, the higher the R-value will be. Expanded polystyrene (EPS) is often associated with poor quality packaging that comes wrapped around new consumer goods such as TVs or washing machines. Polyurethane has been developed to alleviate the shortfalls of EPS. Expanded polystyrene holds 100% of its R value over the life of the product, making it one of the most ideal products to insulate with. There is an approximate 2.5% loss of R-value per 1% of moisture content by volume increase (up to 20% m.c. The key difference between expanded and extruded polystyrene is that we produce expanded polystyrene (or EPS) from solid beads of polystyrene while we produce extruded polystyrene (or XPS) from solid polystyrene crystals.. R value or 50mm polystyrene is 1.25. Expanded vs. Extruded Polystyrene XPS & EPS Differentiators It must also be noted that stated R-values of insulations products vary under different conditions and truly credible comparisons must take into consideration the specific brands of foam and specific test conditions. Expanded Polystyrene Insulation, more commonly referred to as EPS, is a closed cell insulation that has been around since the 1950’s. POLYSTYRENE has a R-value as high as R-5 and as low as R-2 per inch. Because EPS insulation is 98% air, it … Expanded Polystyrene has been used for approximately 50 years. Polyiso and XPS lose R-value over their lifetime. XPS products are manufactured in proprietary processes that melt plastic resin and additives into a molten material, which is extruded through a die where it expands and cools into a uniform closed cell rigid board with no voids or pathways for moisture to enter. Styroboard that has a 2% moisture content by volume will have 95% of it's dry R-value. However, its actual R-value of foam insulations varies, depending on the density of each sheet of insulation. Expanded Polystyrene (EPS): Production, Price, Market and its Properties. PermaTherm EPS insulation (1.0 pcf) provides a typical R-value of 4.17 per inch (k-factor=0.24) at a mean temperature of 40°F, and a typical R-value of 3.85 per inch (k-factor=0.26) at a mean temperature of 75°F. The raw material is for insulation with a normal density range of 11 to 32 kg/m 3 lightweight. Eps is available in any thickness, not just 1″ increments and more! 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