Powerlon Ultraperm Max

Powerlon UltraPerm Max is a 155gsm thermally bonded composite breather membrane comprising two layers of non-woven polypropylene with a microporous film between them. This construction provides exceptional water vapour permeability, allowing moisture to escape from within the building structure, while the hydrophobic outer surface repels wind-driven rain and moisture ingress. Good UV stability allows the membrane to remain unprotected for up to two months during installation, though best practice is to install tiles or slates as soon as possible.

BBA and CE certified for use in all pitched roof types including warm and cold, supported and unsupported, ventilated and unventilated roofs, and for timber frame wall applications. Fully tested to BS 5534:2014+A2:2018 for all wind zones 1-5. W1 water resistance rating. Each roll is supplied with detailed installation instructions and a colour-coded geographical suitability guide per wind zone to help specify the correct grade for the location and exposure. Pre-printed marking lines for roof pitch and overlaps are included for both supported and unsupported roof applications, making installation quicker and more accurate on site. Use Powerbond Acrylic Tape to seal overlaps. Install with the printed side facing outwards.

At 155gsm, UltraPerm Max is the heaviest and highest-specification grade in the range, offering the greatest tensile strength and nail tear resistance for the most demanding and exposed applications. For lighter grades refer to UltraPerm Premium, Standard and Lite.

Benefits

• BBA and CE certified for roofs and walls
• Highest specification in the range, suited to the most exposed locations
• Exceptional water vapour permeability
• Good UV stability
• High tensile strength and nail tear resistance

Good to know 

• Colour-coded geographical suitability guide included
• Fully tested to BS 5534:2014+A2:2018 zones 1-5
• 155gsm
• W1 water resistance