Installation instructions for DuPont Tyvek HomeWrap wall underlay in timber and steel framed buildings, covering preparation, fixing, and flashing.
This guide provides instructions for installing DuPont Tyvek HomeWrap, a flexible wall underlay designed for use behind cladding systems on timber and steel framed buildings. The product is a fully synthetic non-woven high density polyethylene sheet treated to provide high water resistance, high water vapour permeability, and high air barrier properties. It serves as a secondary weather barrier against water ingress and improves the effectiveness of bulk insulation.
| Material | High density polyethylene homogenous sheet |
|---|---|
| Process | Spun-bond process |
| Water Resistance | High |
| Vapour Resistance | <7.0 MN.s/g |
| Roll Weight | 5.8kgs/5.2kgs |
| Width | 3048mm/2743mm |
No, Tyvek HomeWrap cannot be used as a roof sarking.
It must not be exposed to the elements beyond 120 days.
There must be a minimum of 150mm laps for horizontal laps.