V4 was designed to be used in 2x4 construction only and meet R18 (effective) in a typical wall system. Why 2x4 construction only? Because 2x6 walls are thicker, there’s more wood, and thicker insulation helps keep your thicker wall system warm and helps it to dry out in the event of a leak in your structure. While V4 is designed for 2x4 walls, V6 is designed for 2x6 construction. Learn more about Vertibreak® for 2x6 walls.R6.02, RSI 1.06 (1 3/4")
Modelled by Vancouver-based Building Envelope Engineering firm to allow for drying in the unfortunate event of a leak even in the 'rainforest' climate of Vancouver, BC Canada
Exceeds National Building Code of Canada and BC Building Code capillary break / rainscreen requirements.
Meets the NRC's "Tables for Calculating Effective Thermal Resistance of Opaque Assemblies"
Meets Table 184.108.40.206.A of National Building code as a suitable backing for cladding.
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