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Construction Membranes: ProctorWrap High Tensile Roof

ProctorWrap High Tensile Roof

Enviroseal™ ProctorWrap™ HT-R is a highly durable medium duty vapour permeable roof underlay for use in tiled, slate and metal roof applications.

Enviroseal™ ProctorWrap™ HT-R offers a combination of durability and high water holdout without compromising vapour permeability to help protect the building fabric and insulation from condensation and related problems such as mould, timber rot, corrosion and loss of thermal resistance.


Enviroseal™ ProctorWrap™ HT-R shall be installed in accordance with AS/NZS 4200.2 Pliable Building Membranes and Underlays, Part 2 Installation Requirements, and with the printed face upwards. For tile and slate roof applications, Enviroseal™ ProctorWrap™ HT-R should be laid horizontally across the rafters starting at the eaves with adequate drape to allow drainage of moisture, and secured in place with battens and/or counter-battens.

For metal sheet roof applications, Enviroseal™ ProctorWrap™ HT-R should be laid so it forms a continuous membrane over the entire area of the roof, allowing any water to drain down to the gutters. On low pitch metal roofs, excessive draping of Enviroseal™ ProctorWrap™ HT-R between purlins can result in ponding which is unsatisfactory and should be avoided. It is preferable for Enviroseal™ ProctorWrap™ HT-R to be fully supported to give a clear drainage path. If not practical on low pitch roofs then laps should be taped using ProctorWrap™ SLS tape to prevent water ingress to the insulation below.

Features and Benefits

  • High water resistance
  • Medium duty
  • Highly durable
  • Non-perforated
  • Highly vapour permeable
  • Air tight
  • Superior nail seal performance
  • Soft facings reduce flapping noise


Width (mm) Length (m) m2 per pack Weight per roll Rolls per pallet Product Code
1500 50 75 18kg 16 114445


Enviroseal ProctorWrap HT-Roof (PDF)

EnviroSeal ProctorWrap HT MSDS (PDF)

ProctorWrap HTR Installation Guide (PDF)

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