Sarking HVB

Trade Select™ Sarking HVB is designed for use where water barrier and Class 1 Vapour Barrier properties are required for use as a roof sarking and wall wrap in residential and commercial buildings in BCA climate zone 1 and regions north of the Tropic of Capricorn in Climate Zone 2.

NOTE:Condensation risks should be addressed when the product is positioned on the cold side of constructions as the risks may increase.

For BCA climate zones 6, 7, 8 use a Class 3 or better permeable wrap on the outside of the insulation to allow ambient vapour to escape without condensing into liquid. Class 3 Vapour Permeable wrap for typical brick veneer and cavity constructions or Class 4 Vapour Permeable wrap, water barrier for light weight clad constructions.

When specifying, state the following:
Product Name: Trade Select™ Sarking HVB

The insulation to be installed shall be Trade Select™ Sarking HVB, high Vapour Barrier single-sided reflective laminate and shall be installed in accordance with AS/NZS 4200.2: 2017 Pliable Building Membranes and Underlays, Part 2: Installation Requirements.

Emittance Value: 0.90, 0.03
Emittance Classification: IR Non-reflective, IR Reflective
Water Vapour Transmission: 0.190 g/m²•24hr
Vapour Permeance: 0.002 µg/N.s
Vapour Barrier Classification: Class 1
Water Barrier Classification: Water Barrier
Duty: Extra Heavy in accordance with AS/NZS 4200.1:2017

Sarking HVB - Technical Data Sheet (PDF)