Universal 125 Vapour Permeable Underlay

  • Zone 1-5 Compliant
  • Integrated tape for sealing laps
  • Excellent resistance to water penetration
  • Clean and easy to handle
  • For roof applications
  • Durable
  • UV resistant
  • Guidance lines for minimum laps
  • Fabric weight 125g/m2

Description

A lightweight universal underlay for use on pitched roofs with tiles and slates.

The Marley range of underlays have a number of built-in features to help make installing a roof quicker and easier whilst still complying to all current roofing standards.

Easy to handle - supplied in 1m width rolls which are easier to handle than wider 1.5m rolls especially on a roof in windy conditions.

Integrated tape system for sealing underlay laps:

  • Eliminates the need for a fly batten
  • Eliminates the need to increase laps to coincide with a  naturally occurring tile batten
  • Saves money and time

 

To ensure maximum performance and quicker and easier installation, Marley roofing underlays feature an integrated tape system for sealing at the laps.

Guidance lines for minimum laps - the printed guidance lines provide a visual reference to ensure sufficient lap to the British Standard and to ensure that the underlay is laid consistently and straight

Function & Compatibility

A lightweight universal underlay for use on pitched roofs with tiles and slates.
Technical data

 Technical Data
 Product code  MA33155
 Mass per unit area EN 1843-2  125g/m² (+/- 12g/m²)
) Reaction to Fire EN 11925-2  Class E
 Water vapour resistance Sd EN ISO 12572  0.029 m (+/- 0.01g/m²)
) Water penetration EN 1928  Before ageing:  Class W1
 After ageing  Class W1
 Tensile strength EN 12311-1  Before ageing: MD   285N   (-65N)     CD   165N   (-45N)
 After ageing: MD   240N   (-65N)     CD   140N   (-45N)
 Elongation EN 12311-1  Before ageing: MD   70%   (-16%)     CD   90%   (-18%)
 After ageing: MD   30%   (20%)     CD   40%   (-20%)
 Tear resistance EN 12310-1 MD   125N   (-40N)     CD   120N   (-40N)
 Flexibility at low temperature EN1109  No cracking at -60C

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