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Thermal Insulation: Thermax™

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Dow PIR thermax sheathing™pitched roof applications

Dow PIR Thermax Sheathing™ is a non structural, rigid board insulation consisting of a glass fibre-reinforced PIR foam core laminated between smooth, reflective aluminium foil facers on both sides. The glass-fibre reinforcement, along with chemical modifi cations, contribute to improved fire performance and dimensional stability.

The bonded aluminium foil facers serve as effective moisture vapour retarders.

Dow PIR Thermax Sheathing™ Light Duty and Heavy Duty insulating products have an aluminium foil facer on one side with a white coated facer on the other. This design is an aesthetically appealing decorative effect.

Dow PIR Thermax Sheathing™ can be installed exposed to the interior without a thermal barrier which offers a high insulating value and is ideal for installations in attic’s and exposed roof applications without a thermal barrier.

Boards of Dow PIR Thermax Sheathing™ are lightweight and can be sawed or cut with a knife. They install quickly to walls and ceilings – inside and outside of purlins, trusses or bar joints. Butt joints must be installed over structural members.

Compressive Strength: 172 kPa
Density: 32 kg/m³
Width: 1220 mm
Length: 2235 mm
Water Absorption: 0.5 %
Thermal K Value: 0.022 W/mK
Fire Rating: AS/NZS 3837 Group 1

Green Star Compliant
Zero ODP

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