Last but not least, the blowing agents used to make EPS are expo… Both types of foam need to be covered by drywall or another code-approved fire barrier. Additionally, EPS is usually present in structured insulated panels. Polyurethane is a new product with roughly 35 years of testing. It is denser than EPS and provides more R-Value with a rating of 5 per inch of thickness. Both are used in building insulation, but XPS is more durable - and EPS is the kind of foam used for packaging mostly. Some products have reinforced facing to make them sturdier. Styrofoam): Polystyrene. So let’s take a look at the differences. It is a rather poor barrier to oxygen and water vapour and has a relatively low melting point. It’s considered very green which bodes well with the ever-growing trend toward green construction. As nouns the difference between styrofoam and polystyrene is that styrofoam is expanded polystyrene foam, such as is used in cups and packaging while polystyrene is (organic chemistry) a vinylic polymer of styrene, ch 2 chphenyl. EPS foam manages a paltry 12% rate of recycling and the overwhelming majority of recycling centers across the United States refuse to accept the class 6 material. Definitions . Polystyrene (left) is a synthetic aromatic polymer made from the monomer styrene which is also known as Styrofoam. Expanded polystyrene foam differs from extruded polystyrene foam, or XPS, because XPS is far less dense and contains more spaces for air to circulate. Safety Issues Many believe that fiberglass insulation is in itself a hazardous material, citing the fact that it had been found by the International Agency for Research on Cancer as "possibly carcinogenic" in 1988. The manufacturing process for EPS conventionally begins with the creation of small polystyrene beads. The puffing of EPS resin, creating the puffed polystyrene beads is the first step in producing EPS (expanded polystyrene) blocks. Don't let anyone tell you differently. Polyethylene was first synthesized by scientists Reginald Gibson and Eric Fawcett in 1933 when they reacted ethylene with benzaldehyde under extreme heat and pressure. It is an inexpensive resin per unit weight. The 2 lb EPS is available in any thickness, not just 1″ increments and is more economical than extruded polystyrene. Also called Styrofoam insulation, this is the least expensive material. Both Paper and Polystyrene Foam Have Advantages. Use unfaced boards to allow for some drying to occur inward. This is a relatively simple project that can reap great benefits, but with the wide variety of approaches you can take to insulate your garage, how … polystyrene vs styrofoam? One of the reasons people love foamboards is that they are incredibly lightweight thanks to the polystyrene core of foam board, which is 95-98% air. XPS - Extruded Polystyrene Foam Panels - The blue, pink or green ones (eg. Choose this option for areas that need a good amount of strength and water resistance. This article discusses EPS vs. XPS vs. GPS. EPS (Expanded Polystyrene) Vs Polyurethane. Smoothfoam is our brand name for molded EPS or Expandable Polystyrene. Expanded polystyrene (EPS) is a rigid and tough, closed-cell foam with a normal density range of 11 to 32 kg/m 3. The expanded polystyrene is made up of organic elements which means it doesn’t contain harmful materials like chlorofluorocarbons (CFCs) or hydrochlorofluorocarbons (HCFCs). Choose rigid insulation wisely, and consider the effect its characteristics will have on the performance of the your project, overall product cost, and the best way to get the bang for your buck. Polystyrene foam was formerly made with the aid of chlorofluorocarbon blowing agents—a class of compounds that has been banned for environmental reasons. Recently, some growers have tried using polystyrene beads or foam as a replacement for perlite.This plastic aggregate does have an appearance similar in color and particle size to perlite. Because of its smooth surface it is excellent for painting. Styrofoam is a derived term of polystyrene. The resulting polymer could be formed into sheets and rods, or drawn into fibers and films. Polystyrene insulation is commonly known as foam insulation or by its brand name, Styrofoam. This foam board insulation is available with straight or tongue-and-groove edges to help limit air movement. Now foamed by pentane or carbon dioxide gas, polystyrene is made into insulation and packaging materials as well as food containers such as beverage cups, egg cartons, and disposable plates and trays. Polyisocyanurate’s typical R-value for the same 1″ of material is approximately 6.0. Polystyrene itself is a hard and transparent (glassy) type of polymer produced by radical polymerization of styrene. Polyethylene Terephthalate (PET) – PET is known for its ability to be easily ther… Polystyrene is pre-formed to the steel panels and is usually glued to both the front and back of the inside of the panel. Compatibility – XPS vs EPS Insulation. Polystyrene vs. Polyurethane Garage Door Insulation. Polystyrene (PS) is a synthetic aromatic hydrocarbon polymer made from the monomer styrene. It is usually white and made of pre-expanded polystyrene beads. I have been looking for a good price on some balls to cover. XPS performs better than EPS. The production processes behind both kinds of foam are quite different. It has the same 25 psi compression strength as extruded polystyrene Here are the typical applications for each type of insulation: Rigid Foam - Outside walls of homes and below grade. It is wrongly applied to expanded polystyrene foam used to form products. So, you’re thinking about insulating your garage door. The foam used to make cups technically isn’t Styrofoam.) Styrofoam, or expanded polystyrene (EPS), is a versatile material which is used in many different industries today. Polystyrene . The first assembly using 2" Polyisocyanurate foam panels was compared to the same assembly using 2" of EPS foam and was found to be losing 30% more heat in this study (see below)! It really sticks in the craw of Dow Chemical that we call foam food containers “Styrofoam,” despite the fact that Dow has trademarked that name for more than 60 years.. For contractors working with a building made of concrete, XPS tends to be the preferred form of rigid-foam insulation. 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. Puffed polystyrene beads are used for several different applications besides the manufacture of EPS blocks. This foam board insulation is the rigid pink or blue panels that can be found at home centers in many different thicknesses. EPS vs. XPS. Use either extruded polystyrene (XPS) such as Styrofoam or Foamular or expanded polystyrene/EPS, sometimes called “beadboard.” EPS is less expensive and rates about R-4 per inch vs. R-5 for EPS. As we said, Styrofoam™ is a Dow trade, blue in color, and is an extruded polystyrene (XPS) foam made for thermal insulation, construction and craft applications. Expanded polystyrene (EPS) foam is a closed-cell insulation that’s manufactured by “expanding” a polystyrene polymer; the appearance is typically a white foam plastic insulation material (the likes of which can be found as merchandise packaging). XPS cells contain insulating gases in addition to air that eventually diffuses out … McIntire tried to make a new rubber-like polymer by combining styrene with a volatile liquid called isobutylene under pressure. Extruded Polystyrene. Since the purpose of an amendment is to improve physical properties, we conducted studies to compare the two forms of polystyrene with the standard horticultural grade perlite. This material is not Styrofoam. Foamboard is made from polystyrene, a popular type of plastic that is also used in the production of Styrofoam. Expanded Polystyrene (EPS). The result was a foam polystyrene with bubbles and was 30 times lighter than regular polystyrene. Is there a difference between the two? Other Comparisons: What's the difference? Having a bit of time if figuring out styrofoam is softer, or the polystyrene balls are harder. Expanded Polystyrene has been used for approximately 50 years. 12 years ago. In a 2013 Washington Post article, Dow’s business … Recyclability is another major differentiating factor between EPS foam and Styrofoam. Expanded vs. Extruded Polystyrene. R- Value – P olyurethane is the most efficient manmade insulation in the world. Polystyrene can be solid or foamed. EPS is an expanded polystyrene available in various densities for insulation, construction and craft applications and so much more. What’s worse – polystyrene foam has a consumer recycling rate of only 6%, which means that Styrofoam that makes it to customers almost always ends up in a landfill. General-purpose polystyrene is clear, hard, and rather brittle. Today, polyethylene is commonly manufactured in several different forms with vastly different properties: 1. It provides R-values that range from 3.6 to 4.2 per inch. ... vary under different conditions and truly credible comparisons must take into consideration the specific brands of foam and specific test conditions. (Björn Láczay/Flickr)What’s the difference between styrofoam and polystyrene, anyway? You Decide?? XPS is also commonly known as Styrofoam. EPS, on the other hand, is perfect for insulating and sound-proofing. 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. Polystyrene, which already had been invented, was a good insulator but too brittle. It is a smooth, closed cell foam, most commonly referred to as smooth Styrofoam ®. Rigid foam insulation uses one of three materials: high-quality, green-friendly polyisocyanurate; extruded polystyrene; or expanded polystyrene. However, EPS insulation has proven to perform just as well in such situations. It is molded from tiny beads into many shapes like balls, bells, eggs, miniature fruit shapes and more. Styrofoam™ is closed-cell polystyrene petroleum-chemical formulation foam that is extruded to form panels. It is a trademarked brand that is used interchangeably by the public for different products and brands made of … See for yourself the performance advantages of Extruded Polystyrene (XPS) vs. Polystyrene has a typical R-value of approximately 4.4 per 1″ thickness of material. This versatility was one of the defining traits of polyethylene. While Styrofoam is not recyclable, expanded polystyrene is extremely recyclable. Polyurethane has been developed to alleviate the shortfalls of EPS. Polystyrene or Styrofoam Beads Polystyrene beads are often mistakenly referred to as STYROFOAM™ beads. eklypz. Rigid-foam insulation packs a lot of R-value into a thin package, but not all rigid foam performs the same. • Expanded Polystyrene. 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. It is the white brittle material that is frequently used in shipping to protect the goods inside. There are many ways to insulate, including rigid foam insulation, spray foam insulation, fiberglass batt insulation, blown in cellulose insulation, and more. Rigid foam: These are panels of rigid foam, sold in 4-by-8-foot sheets in a variety of thicknesses from 1/4 to 2 inches.It is also sold in large bundled panels, joined at the ends accordion-style for use as an exterior sheathing material. Material costs are about &0.31 per square foot for each inch of thickness, plus installation costs. 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