Powerlon® UltraPerm is a range of high performance breathable underlays, BBA certified for all pitched roof types; warm and cold, supported and unsupported, ventilated and unventilated. Powerlon® UltraPerm can also be used in timber frame wall applications.

Available in a choice of four grades; Lite 92 gsm, Standard 115 gsm, Premium 135 gsm and Max 155 gsm, Powerlon® UltraPerm is tough, durable and tear resistant with exceptional water vapour permeability (breathability) and hydrophobic (water repellent) characteristics.

The Powerlon® UltraPerm range is fully tested to the latest BS 5534:2014 + A1:2015 zones 1-5.

Use Powerbond Acrylic Tape to seal overlaps.

Features and benefits:

BBA certified for roofs and walls.
Four grades available; 92 gsm, 115 gsm, 135 gsm & 155 gsm.
Breathable with high water vapour permeability.
Exceptional W1 water resistance.
High tensile strength and nail tear resistance.
Pre-printed marking lines.
Independently tested for full compliance with BS 5534:2014 + A2:2018.
CE approval.
Bespoke printing available.

Powerlon® UltraPerm Max Breather Membranes - CE Marking