RAVATHERM XPS X MK
BSI Kitemark
Certificate type
A spun-bonded polyethylene geotextile, this vapour permeable waterpoof membrane is used as a ‘breather’ layer in inverted ballasted flat roofs.
To be used in conjunction with Ravatherm XPS X 300 SL for an inverted flat roof - a form of flat roof where the thermal insulation is placed above the waterproof membrane.
Ravatherm XPS X MK is a water flow reducing layer (WFRL) consisting of a polyethylene geotextile, used in conjunction with Ravatherm XPS X 300 SL.
Features and benefits:
- Water vapour-permeable.
- Water-resistant.
- Tear-resistant.
- Uv stable - can be left exposed outdoors for up to four months.
- Fire - melts and shrinks away from a heat source (unclassifiable as regards building regulations)
- Temperature - retains flexibility and toughness down to -73°c, melting point is 135°c
- Excellent rot resistance making it ideal for insulating green roofs.
A WFRL is a critical component of an inverted flat roof, minimising heat loss due to the rainwater cooling effect.
Ravatherm XPS X MK prevents rainwater from reaching the waterproofing layer, thereby reducing the rainwater cooling effect caused by rainwater flowing between the insulation and waterproofing membrane.
Application:
To be used in conjunction with Ravatherm XPS X 300 SL for an inverted flat roof - a form of flat roof where the thermal insulation is placed above the waterproof membrane.
Color | Grey |
Shape | Rectangular |
Uniclass 2015 | |
CAWS | J31/130 Inverted roof coating J31/390 Water flow reducing layer J41/120 Built-up reinforced bitumen membrane inverted roof covering J41/390 Water flow reducing layer J42/120 Inverted roof covering J42/390 Water flow reducing layer |
Product Reference | RAVATHERM XPS X MKTo be used in conjunction with Ravatherm XPS X 300 SL. |
Form | Spun-bonded polyethylene geotextile membrane |
Root inhibitor | Waterproof layerRavatherm XPS X MK should be loose-laid over the insulation, at right angles to the slope with 300 mm laps running down the slope. |
Physical properties | - |
Weight (minimum) | 5 kgFor 1.5m roll length. 19 kgFor 3.0m roll length |
Dimensions | 1.5 m x 50 m3.0 m x 100 m |
Width (minimum) | 1.5 m3.0 m |
Roll length (minimum) | 50 m100 m |
Performance | - |
Elongation to break | 17 ± 5 % MDTo EN 12311-1. 20 (± 6) % XDTo EN 12311-1. |
Fire performance | Class ETo EN 11925-2 when tested with XPS range. |
UV stabilization | Up to four monthsCan be left exposed outdoors. |
Colour | White SheetingWith guidance lettering in blue. |
Watertightness | W1 Class - to EN 1928 (A) |
Nail shank | 55 ±20 N MDTo EN 12310-1. 50 ±20 N XDTo EN 12310-1. |
Flexibility at low temperature | -40°CTo EN 1109. |
Standard product features | Colour: White sheeting with blue guidance lettering. Features: A WFRL is a critical component of an inverted flat roof, minimizing heat loss due to the rainwater cooling effect. Finish: Polyethylene geotextile. Material: Polyethylene geotextile sheeting. Shape: Roll. Size: Supplied in 1.5 x 50 m or 3.0 x 100 m roll lengths. |
| Platform | Compatible | Version | Certified to |
|---|---|---|---|
 IFC | - | 6 | 2.1 |
 Revit | - | 6 | 2.1 |
- BS EN 12311-1:2000 - Flexible sheets for waterproofing. Determination of tensile properties. Bitumen sheets for roof waterproofing
- BS EN ISO 11925-2:2020 - Reaction to fire tests. Ignitability of products subjected to direct impingement of flame. Single-flame source test
- BS EN 1928:2000 - Flexible sheets for waterproofing. Bitumen, plastic and rubber sheets for roof waterproofing. Determination of water tightness
- BS EN 12310-1:2000 - Flexible sheets for waterproofing. Determination of resistance to tearing (nail shank). Bitumen sheets for roof waterproofing
- BS EN 1109:2013 - EN 1109:2013Approval standard: Flexible sheets for waterproofing. Bitumen sheets for roof waterproofing. Determination of flexibility at low temperature