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One Way (Maximum)

Available in 2 variations
  • Size 50m x 1.5m or 75m x 1m (75 sq metres per roll).
  • Weight 12.375 kg per roll.
  • Colour dark blue
  • Construction 3 layer PP.
  • Thermally bonded (not reliant on glue for stability or weight).
  • Weight 165 gm²
  • Strength (nail tear N)220/220
  • Vapour resistance 0.21MNs/g (breathability).
  • Water resistance hydrostatic head >700cm H20.
  • Elongation MD/CD,%50/60.
  • Tensile MD/CD,%330/250.
£121.00 + VAT
£181.50 + VAT

Gallery

Use

One-Way (Maximum)is an aspirating roofing underlay for non-ventilated pitched roof systems.
The 'Maximum' suffix qualifies this is the heaviest aspirating underlay available.

The performance is very similar to One-Way (Heavy Duty), but the thermally bonded structure is thickened.One-Way (Maximum) provides the strongest possible protection and the highest possible resistance against tearing and ripping.

Introduction

One-Way (Maximum)is suitable for use in all warm and cold- pitched roof applications.
Moisture vapour generated within a property can safely ventilate through One-Way (Maximum).

The aspirating benefit is capable of venting over five times the moisture generated within a typical house.Thus this product can be used to satisfy the protection,ventilation and vapour aspirating qualities demanded by the Building Regulations and provides an alternative to the use of conventional ventilation products and methods.

General

This material has been tested to meet/contribute to the requirements of Building Regulations (England and Wales)
2000,C4 ,Regulation 7. Building Standards (Scotland)Regulations 1990 , Regulation 10, B2.1, B2.2 , G3.1. Building Regulations (Northern Ireland) B2 and C4.

One-Way aspirating underlay mayalso be used as a supported or unsupported underlay in tiled and slated roofs constructed in accordance with BS 5534.Always consider the complete roof construction (from ceiling boards to roof tiles)with regard condensation risk.Install only in accordance with our installation instructions that accompany every order.

Data

  • Size 50m x 1.5m or 75m x 1m (75 sq metres per roll).
  • Weight 12.375 kg per roll.
  • Colour dark blue
  • Construction 3 layer PP.
  • Thermally bonded (not reliant on glue for stability or weight).
  • Weight 165 gm²
  • Strength (nail tear N)220/220
  • Vapour resistance 0.21MNs/g (breathability).
  • Water resistance hydrostatic head >700cm H20.
  • Elongation MD/CD,%50/60.
  • Tensile MD/CD,%330/250.
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