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The 220 Series wall underlay is for use as a wall underlay behind exterior wall claddings. This fire-retardant, breathable, absorbent underlay is made from non-woven polypropylene and gives optimum water resistance and water vapour permeability. Thermal performance is enhanced when this underlay is bonded on the warm side of the bulk insulation. The lightweight and reflective design delivers a high tensile strength.
- Water barrier
- BRANZ appraised
- Can be used on timber framed buildings with absorbent and non-absorbent PVC wall cladding direct fixed to framing
- Can be used on timber buildings with absorbent and non-absorbent wall cladding installed over an 18mm minimum drained cavity
- Suitable up to and including 'very high' building wind zones of NZS 3604S