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Application

Used in conjunction with Ravatherm XPS X 300 SL within an inverted flat roof.

Description

Spun-bonded polyethylene, geotextile membrane water flow-reducing layer (WFRL) that is waterproof, but at the same time water vapour-permeable. Used in conjunction with Ravatherm XPS X 300 SL within an inverted flat roof, it minimizes heat loss, and can therefore reduce the volume of insulation required. It prevents rainwater from reaching the waterproofing layer, thereby reducing the rainwater cooling effect caused by rainwater flowing between the insulation and waterproofing membrane.

Features and benefits:

  • Water vapour-permeable.
  • Water-resistant.
  • Tear-resistant.
  • UV stable – can be left exposed outdoors for up to four months.
  • Melts and shrinks away from a heat source (unclassifiable in terms of Building Regulations).
  • Retains flexibility and toughness down to -73°C; melting point is 135°C.
  • Excellent rot resistance, making it ideal for insulating green roofs.

Application:

Used in conjunction with Ravatherm XPS X 300 SL within an inverted flat roof.

General information
Material

Polyethylene geotextile

Uniclass 2015 Plastics sheets (Pr_25_57_65_60)
Specification data
Product Reference

Ravatherm XPS X MK

Purpose

Water flow-reducing layer (WFRL)

Performance characteristics – tensile strength (minimum)

310 N/5 cm (to EN 12311-1)

Performance characteristics – tear resistance

MD: 55 N (±20); XD: 50 N (±20) (to EN 12311-1)

Performance characteristics – elongation to break

MD: 17% (±5); XD: 20% (±5) (to EN 12311-1)

Form

Spun-bonded

Roll size (w x l)

1.5 x 50 m

3 x 100 m

Standard product features

Feature:

Minimizes heat loss, and can therefore reduce the volume of insulation required.

Material:

Polyethylene geotextile.

Technical characteristics:

  • Reaction to fire (to EN 11925-2): Class E.
  • Watertightness (to EN 1928 (A)): Class W1.
  • Sd-value (to EN ISO 12572): 0.01 m (+0.015/ -0.007).
  • Flexibility at low temperature (to EN 1109): -40°C.

Literature
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