What Is XPS Rigid Insulation?

Extruded polystyrene (XPS) foam is a rigid insulation that's also formed with polystyrene polymer, but manufactured using an extrusion process, and is often manufactured with a distinctive color to identify product brand.

Does XPS insulation need to be covered? Rigid foam insulation, whether it is expanded or extruded polystyrene, does have to be covered if it is installed in the interior of a building. This wall covering must have a minimum fire rating to protect the insulation from quick combustion during a fire.

what does XPS insulation stand for?

Extruded polystyrene insulation (XPS) is manufactured using a process of extrusion. The closed cell structure of extruded polystyrene (XPS) prevents water penetration to the structure of the insulation board and provides long term strength and durability.

Is XPS waterproof? XPS. XPS is another waterproof, rigid insulation material. The final product is rigid, dense and waterproof. As a result, XPS is commonly used for roofing and below grade to insulate cement slabs and foundation walls.

what is the best rigid insulation?

Expanded polystyrene (EPS), or beadboard, serves as the best insulating rigid foam for homeowners on a budget. This material costs less than other rigid foam boards, but still offers an R--value of 3.6 to 4.2 per inch, according to Fine Homebuilding.

What is the R value of XPS? 5 per inch

which is better EPS or XPS?

You guessed it: A challenger has stepped up to debate the durability of EPS. Not only that, but they have also claimed that extruded polystyrene (XPS) is the better option. For the same 1 inch thick sheet with the same density, XPS has a lower moisture absorption rating than EPS due to these differences.

Is EPS the same as Styrofoam? The word Styrofoam™ is often used to describe expanded polystyrene (EPS) foam; however, 'Styrofoam' is actually a trademarked term for closed-cell extruded polystyrene foam made for thermal insulation and craft applications. EPS foam is the correct term for any form of expanded polystyrene.

What is rigid foam insulation?

Rigid foam is a durable, effective insulation material When most people think of insulation, they think of fluffy materials that are easily compressed or torn. However, rigid foam board insulation is a unique insulation option that provides excellent durability and insulating capabilities.

How is XPS made? Extruded polystyrene insulation or XPS Insulation is manufactured through an extrusion process. This manufacturing process involves melting together the plastic resin and other ingredients. The liquid formed is then continuously extruded through a die and expands during the cooling process.

Is EPS a vapor barrier?

A: No, although EPS has a low water vapor transmission rate, EPS is not a vapor barrier. Rather it "breathes", and therefore does not require costly venting as do other insulation materials, which would otherwise trap moisture within walls and roof assemblies.

What is XPS material?

X-ray photoelectron spectroscopy (XPS) is a surface-sensitive quantitative spectroscopic technique that measures the elemental composition at the parts per thousand range, empirical formula, chemical state and electronic state of the elements that exist within a material.

What is XPS foam made of?

Extruded polystyrene (XPS) foam is a rigid insulation that's also formed with polystyrene polymer, but manufactured using an extrusion process, and is often manufactured with a distinctive color to identify product brand.

Why is polystyrene used for insulation?

Foamed polystyrene contains millions of tiny air bubbles trapped in the foam, many smaller than can be seen by the naked eye. Air is a poor heat conductor and since polystyrene has a high thermal resistance itself, it's very effective at preventing heat transfer.

What does EPS mean in construction?

Building and Construction Expanded polystyrene (EPS) is an innovative building material that lends to the design and structural integrity of many building projects. Since the 1950s, EPS has been recognized as a mainstream insulation material, however over the past decade, new applications have rapidly developed.

What is the R value of EPS?

EPS insulation (1.0 pcf) provides a typical R-value of 3.85 per inch (k-factor =0.26) at a mean temperature of 75°F, and a typical R-value of 4.17 per inch (k-factor = 0.24) at a mean tem-perature of 40°F. R-value means the resistance to heat flow.

Is XPS fire rated?

1 of the 2012 IBC specifies that any wall assembly that requires a fire resistant rating (as measured using ASTM E119) must maintain that rating even when it contains a foamed plastic. There are many listed fire rated wall assemblies that contain STYROFOAM XPS Brand Insulation or THERMAX Brand Insulation.

Is XPS foam toxic?

As an insulation it is non-toxic, and unlike foam products there are no blowing agents that will off-gas into your home. That means it can lead to cleaner indoor air quality, and the R value will never change, whereas foam products will deteriorate over time as the gases escape.

Is EPS fire resistance?

Fire Performance & Safety Like practically all organic building materials polystyrene foam is combustible. Although foam insulation is relatively difficult to ignite, in the case of ignition, burning will readily spread over the exposed surface of the EPS and it will continue to burn until all EPS is consumed.

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