Designed as a means of managing condensation water vapour transfer and water ingress in roof applications.
Self supporting roof underlay nz.
Requires horizontally laid underlay must be fixed to the purlins on both edges by the roof fastenings i e.
Fully self supporting it is used in the roof cavity as a second line of defence against the weather.
Designed as a means of managing condensation water vapour transfer and water ingress in roof applications.
Covertek 405 is a fire retardant absorbent and breathable synthetic self supporting roof underlay.
Duty grade of underlay in accordance with nzs4200 1.
They are a breather type material consisting of bitumen saturated heavyweight kraft paper or fire retardant solvent free laminated two layers reinforced heavyweight kraft paper coated with a water based water repellent.
As a heavy duty roofing underlay r2 self supported up to a purlin spacing of 1200mm otherwise supported on mesh or strapping at 300mm centres.
Dristud fru 38 is a heavier grammage self support roof underlay whereas dristud fru 36 is a lighter grammage self support roof underlay.
It is intended for use on new and existing buildings in wind zones up to and including extra high as defined in nzs 3604 2011.
Self support and synthetic underlay is usually 1250mm wide and requires a 150mm lap.
Self supporting roofing underlays designed to span between purlins where the purlin spacing is not more than 1200 mm.
The fru 38 is a self supporting roof underlay.
Constructed using a microporous water resistant film sandwiched between two layers of spun bonded polyolefin.
10m maximum run lengths are recommended to minimise shrinkage.
Constructed using a microporous water resistant film sandwiched between two layers of spun bonded polyolefin.
Pauloid roof underlay is a self supporting breather type building paper.
Recommended in very high wind areas.
The purlin spacing must be 150mm less than the width of the underlay.
Pauloid roof underlay is manufactured in nz.
It is intended for use on new and existing buildings in wind zones up to and including extra high as defined in nzs 3604 2011.
1250mm x 40 0m 50m 1500mm x 40 0m 60m 2200mm x 50 0m 110m features.
Dristud ru24 must not be installed where fire retardant roof underlay is specified.
Covertek 405 is a fire retardant absorbent and breathable synthetic self supporting roof underlay.
