Dalpro^® is a 3-layer low resistance, vapour permeable air barrier roofing underlay, which resists the penetration of air into the structure.
Dalpro^® is a low resistance vapour permeable air barrier roofing underlay, 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^® Dalpro^® is installed, there is no need to ventilate the roof space, providing the fabric is installed in accordance with the relevant Agrément Certificate, as the vapour permeability allows moisture to diffuse through the underlay.  In mainland UK and Northern Ireland the underlay should be installed in accordance with British Board of Agreement Certificate No. 07/4442. 
Dalpro® can be used in both ventilated and non-ventilated cold & warm pitched roof systems for tiles and slates.Daltex^® Dalpro^® is suitable for fully supported or unsupported roofing applications, and can also be used in conventional ventilated roof construction.

 Air Barrier - Allows More Energy Efficient Design

• Underlay for warm & cold pitched roofs
• Ventilated and unventilated warm and cold roof applications
• 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  
• 125 micron breathable rolls 50m x 1m (50sq m)