Thermal Value Structural timber stud dimensions are critical factors especially in prefabricated units and increasing stud depths is not always practical. Despite this, stud sizes may need to be increased to accommodate more insulation in order to comply with the thermal regulations. Tyvek® Reflex can help to alleviate this due to the additional thermal resistance that it provides. The thermal benefit provided by Tyvek® Reflex compared to a standard breather membrane is demonstrated in below tables including the usage of the airtight vapour control layer DuPont™ AirGuard® Reflective .

Searching for the right Reflective Breather Membrane? Get the wall u-value down to 0.22 and improve your thermal performance on a 140 mm STUD size using Mineral Batt at 0.032 along with Tyvek® Reflex and DuPont™ AirGuard® Reflective !

1- U-Values of entire wall construction achieved with 89 mm STUD (and 89 mm fibrous insulation)

* PIR insulation 70 mm thick and foil faced to leave 20 mm service void

2- U-Values of entire wall construction achieved with 140 mm STUD (and 140 mm fibrous insulation)

* PIR insulation 120 mm thick and foil faced to leave 20 mm service void

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