ITP 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. ITP 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, ITP UltraPerm is tough, durable and tear resistant with exceptional water vapour permeability (breathability) and hydrophobic (water repellent) characteristics.

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

Use ITP Powerbond S/S Sealing Tape Acrylic 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