Resources – Quality SIPs

EPS, XPS, and ISO foam insulation are all rigid and lightweight, with excellent insulating properties. However, they differ in composition, manufacturing process, strength, and R-value. Let's take a closer look at each type:

EPS (Expanded Polystyrene)

EPS foam insulation is made from expanded polystyrene beads that are fused together. It is a lightweight and versatile product that can be used in a wide range of applications, including walls, roofs, and foundations. EPS foam insulation is also often used in packaging and other applications.

Benefits of EPS foam insulation:

Lightweight and easy to handle
Affordable
Versatile, with good insulating properties
Recyclable

Situations for the use of EPS foam insulation:

Walls and roofs
Below-grade applications
Packaging

XPS (Extruded Polystyrene)

XPS foam insulation is made by melting polystyrene pellets and extruding them into rigid panels. It is a dense and strong product that has a higher R-value per inch than EPS foam insulation. XPS foam insulation is often used in below-grade applications, such as insulating foundation walls, as well as in roofing and other applications.

Benefits of XPS foam insulation:

Dense and strong, with high compressive strength
Moisture-resistant
Resistant to mold and mildew
Higher R-value per inch than EPS foam insulation

Situations for the use of XPS foam insulation:

Below-grade applications, such as foundation walls and slabs
Roofing and other applications where high compressive strength is needed

ISO (Polyisocyanurate)

ISO foam insulation is made from polyisocyanurate resin and other chemicals. It is the most energy-efficient of the three types, with a high R-value per inch. ISO foam insulation is often used in roofing applications, as well as in wall and floor assemblies.

Benefits of ISO foam insulation: