There are many different types of insulation materials to choose among when applying a commercial roof or retrofitting an existing structure. The function of roof insulation is to insulate the building against heat flow in and out, while providing a smooth, dry, clean and firmly-attached substrate for the roof membrane.

Proper insulation is necessary for energy efficiency, condensation control and, in some systems, structrual integrity against uplift pressure.

Extruded polystyrene foam (XPS) insulation has a combination of properties that make it a strong and efficient insulating material. Its proven resistance to moisture; reliable strength and durability--even without a facer or coverboard; and stable long-term R-Value make it a top insulating material for commercial, industrial and residential structrures.

Benefits of using XPS in roof applications also have positive environmental attributes, such as long-term durability and recyclabilityŚmaking XPS an ideal choice when re-roofing a building.

And, in Direct-to-Steel Deck applications; cost savings are achieved because you no longer require a thermal barrier between the insulation and the metal deck.

Making a choice for XPS as your conventional roofing system insulation allows for excellent, long-term performance from the insulation.

In fact, XPS offers exceptional performance in plaza and protected membrane (PMRA) roofing applications. XPS allows for:

  • Excellent moisture resistance and stable long-term R-value;
  • Extending the life of plaza or roof, providing protection of the membrane from ultraviolet deterioration;
  • Protection of the membrane against weathering, physical abuse and damage;
  • Maintaining themembrane at a relatively constant temperature, thus minimizing effects of freeze-thaw cycling and excessive heat;
  • Reduced installation, material and repair expenditures; and
  • Easy removal and re-installation of ballast and insulation.

The links to the right-hand side of the page will lead you to various types of commercial roof assemblies that most-efficiently deploy XPS properties. Be sure to visit them for more specific information on various roof applications employing the use of XPS.



About XPSA

The Extruded Polystyrene Foam Association (XPSA) is a trade association representing manufacturers of Extruded Polystyrene Foam (XPS) insulation products and the industry's raw material suppliers. XPSA members collectively manufacture more than 95% of all XPS destined for use in the North American market. XPSA promotes the benefits that accrue to society from appropriate use of XPS foam insulation applications.

© Copyright 2016 The Extruded Polystyrene Foam Association

XPSA Headquarters

750 National Press Building
529 14th Street, NW
Washington, DC 20045

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