XPS Technical Resources

This page provides important data for architects, builders, and specifiers, emphasizing why XPS is the preferred choice in thermal insulation.

Technical Bulletins

See XPSA’s bulletins regarding Canadian LTTR Compliance and RSI Design Values.

NFPA 285 & ASTM E119

Read the engineering extension letter for DuPont™ Styrofoam™ XPS, Kingspan^®GreenGuard^®XPS, or Owens Corning™ FOAMULAR^® XPS foam plastic insulation for Brick Industry Association (BIA) Thin Brick Exterior Wall Systems, and NFPA 285 and ASTM E119 Compliant Wall Assemblies.

Technical Insights

Getting Practical about R-Values in the Design of Habitable Basements (PDF)

Technical Insights, Below Grade Series ID: TI-BG-07

Habitable Basement Thermal Control Challenges (PDF)

Technical Insights, Below Grade Series ID: TI-BG-08

The Key Question: Exterior or Interior Insulation? (PDF)

Technical Insights, Below Grade Series ID: TI-BG-09

Protected Membrane Roofing Assemblies Gain Widespread Acceptance for Sustainability (PDF)

Technical Insights, Protected Membrane Series ID: PMRA-01

The Versatility of Protected Membrane Roof Assemblies (PDF)

Technical Insights, Protected Membrane Series ID: PMRA-02

Guide to Specifying XPSA for Protected Membrane Roof Assemblies (PDF)

Technical Insights, Protected Membrane Series ID: PMRA-04

Limitations of Short-term Testing of XPS and EPS Polystyrene Foam Insulation: An Overview of Moisture Absorption in Polystyrene Foam Insulations (PDF)

Technical Insights, Below Grade Series ID: TI-BG-02

Moisture Absorption Mechanisms in Polystyrene Foams Are Keys to Predicting Long-term Performance: XPS and EPS Behave Differently in Moist Below-Grade Applications (PDF)

Technical Insights, Below Grade Series ID: TI-BG-03

Simple Experiments Demonstrate How Water Moves More Freely through EPS than XPS (PDF)

Technical Insights, Below Grade Series ID: TI-BG-04