Fully self supporting it is used in the roof cavity as a second line of defence against the weather.
Self supporting roof underlay nz.
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.
Covertek 405 is a fire retardant absorbent and breathable synthetic self supporting roof underlay.
The purlin spacing must be 150mm less than the width of the underlay.
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.
Dristud fru 38 is a heavier grammage self support roof underlay whereas dristud fru 36 is a lighter grammage self support roof underlay.
Recommended in very high wind areas.
Dristud ru24 must not be installed where fire retardant roof underlay is specified.
Constructed using a microporous water resistant film sandwiched between two layers of spun bonded polyolefin.
Highly water vapour permeable allowing excess water vapour that may otherwise condense in the wall structure to escape.
Self support and synthetic underlay is usually 1250mm wide and requires a 150mm lap.
The fru 38 is a self supporting roof underlay.
Covertek 405 is a fire retardant absorbent and breathable synthetic self supporting roof underlay.
Designed as a means of managing condensation water vapour transfer and water ingress in roof applications.
Pauloid roof underlay is manufactured in nz.
Requires horizontally laid underlay must be fixed to the purlins on both edges by the roof fastenings i e.
10m maximum run lengths are recommended to minimise shrinkage.
Pauloid roof underlay is a self supporting breather type building paper.
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 supporting roofing underlays designed to span between purlins where the purlin spacing is not more than 1200 mm.
1250mm x 40 0m 50m 1500mm x 40 0m 60m 2200mm x 50 0m 110m features.
Designed as a means of managing condensation water vapour transfer and water ingress in roof applications.
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 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.
