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.
Self supporting roof underlay nz.
Covertek 405 is a fire retardant absorbent and breathable synthetic self supporting roof underlay.
10m maximum run lengths are recommended to minimise shrinkage.
Requires horizontally laid underlay must be fixed to the purlins on both edges by the roof fastenings i e.
Self supporting roofing underlays designed to span between purlins where the purlin spacing is not more than 1200 mm.
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.
Highly water vapour permeable allowing excess water vapour that may otherwise condense in the wall structure to escape.
Constructed using a microporous water resistant film sandwiched between two layers of spun bonded polyolefin.
Designed as a means of managing condensation water vapour transfer and water ingress in roof applications.
Recommended in very high wind areas.
Pauloid roof underlay is manufactured in nz.
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.
Self support and synthetic underlay is usually 1250mm wide and requires a 150mm lap.
Duty grade of underlay in accordance with nzs4200 1.
Constructed using a microporous water resistant film sandwiched between two layers of spun bonded polyolefin.
Self supporting as a ceiling underlay down to 10 degree pitch thermakraft 215 building paper bituminous self supporting wall and roof underlay for use in residential or commercial walls and roofs.
Designed as a means of managing condensation water vapour transfer and water ingress in roof applications.
The purlin spacing must be 150mm less than the width of the 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.
Dristud fru 38 is a heavier grammage self support roof underlay whereas dristud fru 36 is a lighter grammage self support roof underlay.
The fru 38 is a self supporting roof underlay.
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.
Fully self supporting it is used in the roof cavity as a second line of defence against the weather.
