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.
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
|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|