Differences Between Heat Insulation Panels

There are mainly three types of heat insulation panels: polyisocyanurate (ISO), extruded polystyrene (XPS), and expanded polystyrene (EPS) – and each has different performance attributes. They are all foam core panels.

ISO is primarily used in roofing applications. The panels provide up to R-6.5 per inch of thickness but degrade slightly over time. ISO panels are expensive, and cannot be recycled.

XPS is a recyclable material mostly used in walls and lower grade applications. XPS foam panels provide about R-5 per inch of thickness and fall between ISO and EPS in cost. However, XPS absorbs more moisture than other insulation panels over time.

EPS foam has the highest average R-value per dollar of the rigid foams (about R-4.6 per inch) without degrading. EPS is one of the most versatile candidates in heat insulation panels because you can use it anywhere in the building envelope.

About Thermal Bridging

A thermal bridge occurs when penetration of the insulating layer takes place along your walls, allowing heat and cold to pass through undisturbed. With fiberglass and wood framing, each wood stud represents a thermal short circuit where moisture-filled, heat-transferring air can pass through the barrier. The stud area accounts for 15% to 25% of the wall surface and significantly reduces the R-value of the fiberglass.

TOPOLO EPP Insulation Panel

TOPOLO EPP foam sandwich panels are fully encapsulated by the insulating material and eliminate the potential of thermal bridging. As a heat insulation panel, EPP is highly integrated and non-conductive. Interlocking grooves also create a tight seal at the intersection of each panel.