Daltex® RoofTX® Extra

Daltex® RoofTX® Extra is a low resistance, vapour permeable air barrier roofing underlay, with reinforcement for extra strength. Daltex® RoofTX® Ultra is also certified for use in walling.

Daltex® RoofTX® Extra is specifically designed to allow the ready transfer of moisture through the underlay, thereby reducing the risk of condensation in the roof structure. In warm pitched roofs and UK cold pitched roofs, when Daltex® RoofTX® Extra is installed, there is no need to ventilate the roof space, providing the fabric is installed in accordance with the relevant Agrément Certificate. Daltex® RoofTX® Extra is suitable for fully supported or unsupported roofing applications, and can also be used in conventional ventilated roof construction.

Reinforced for Extra Strength

  • Enhanced tensile strength and tear resistance
  • Certified in UK for unventilated cold roof applications
  • Excellent resistance to water penetration
  • Protects against wind driven rain, snow and dust
  • Excellent water vapour transmission properties
  • Enhanced flammability resistance to EN 11925-2 
  • Durable, flexible & lightweight
Roll SizeRoll WeightColourPallet Size
1.0m x 50m10.4kgE4 Grey1110 x 1110mm
1.5m x 50m15.6kgE4 Grey1110 x 1110mm

Technical Data
Mass (per unit area)
(EN 1849-2)
208g/m2
Tensile Strength
(EN 12311-1)
Machine: 470 N/50mm
Cross: 340 N/50mm
Tear Resistance
(EN 12310-1)
Machine: 370 N
Cross: 350 N
Water Vapour Transmission
(EN 12572)
1100 g/m2/24 hrs
Resistance to Water Penetration (EN 1928)W1
Flame Retardancy
(EN 13501-1)
Class D*
*When tested to EN 11925-2