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
| 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 | |