Powerlon UltraPerm Roof Breathers

Powerlon Ultraperm Breather Membranes

  • Non-woven composite high performance underlay
  • Tough, durable and tear resistant
  • BBA certified for roofs and walls
  • CE Marking
  • Tested to the latest BS 5534:2014+A1:2015 standards
  • Exceptional water vapour permeability
  • Water repellent with good UV stability 
  • Choice of five grades
  • Customised printing available 
  • Flame retardant to Class E
  MultiZone Max   Premium Standard Lite
125gsm 155gsm 135gsm 115gsm 92gsm
Colour Dark Grey Green Blue Grey Black
 Standard sizes

1.0 x 50m
1.5 x 50m

1.0 x 50m
1.5 x 50m
1.0 x 50m
1.5 x 50m
1.0 x 50m
1.5 x 50m
1.0 x 50m

Wind Zone App

Which grade made simple with our instant answer app!

  • access the app
  • enter any UK postcode or click on the map
  • get the right product for your roofing project

Get the app here


UV Low Pitch

  • UV resistant breathable roofing membrane
  • Suitable for low pitched roofs down to a 5 degree pitch
  • CE Marking
  • Exceptional UV resistance for long term exposure
  • Water repellent
  • Flame retardant to DIN 4102 B1
  • 10 year guarantee*
  UV Low Pitch
Colour Black
 Standard sizes 2.5 x 26m

*Conditions apply. See Tech Base and Legal Notices.


Powerlon UltraPerm is a range of high performance breathable underlays for all pitched roof designs and wall applications (timber frame). It is tough, durable and tear resistant with exceptional water vapour permeability and hydrophobic (water repellent) characteristics.

Each roll is supplied fully comprehensive label with detailed installation instructions and a colour-coded map for geographical suitability per wind zone and membrane grade.

Powerlon UltraPerm is a non-woven composite membrane available with and without integrated self-adhesive strips. With preprinted marking lines for both roof pitch and overlaps for supported and unsupported roofs. This makes installation quicker and easier.

Powerlon UltraPerm universal breather membranes are BBA Certified (Certificate 13/5037). This Agrément Certificate relates to Powerlon UltraPerm, for use as breather membranes in timber-frame walls with a cavity and a masonry outer leaf, weatherboarding or tile/slate cladding; for use as roof tile underlays in cold, non-ventilated pitched roof systems; and for use as roof tile underlays in warm non-ventilated and cold ventilated pictched roof systems.

Powerlon UltraPerm has CE Marking for "Flexible sheets for waterproofing – Underlays for discontinuous roofs (EN 13859-1:2010) and walls (EN 13859-2: 2010)"

Powerlon UV Low Pitch is a high performance, breathable membrane with exceptional UV resistance and CE Marking. The technically advanced, engineered material issuitable for shallow pitched roofs, with a pitch of 5 degrees and over. It has a 10-year guarantee* and is flame retardant to DIN 4102 B1.

Industrial Textiles & Plastics Ltd is ISOQAR Quality Assured and certified to ISO 9001.

ITP's Building Team provides technical support and customer-specific service. Contact them on +44(0)1347 825200 or email powerlon@itpltd.com.

See Tech Base for more information about Certification and Compliance.

*Conditions apply. See Tech Base and Legal Notices.



Powerlon UltraPerm can be used on warm and cold, supported and unsupported, ventilated and unventilated roofs. It is suitable for all roof types and walls in timber frame constructions.

Powerlon UV Low Pitch is suitable for shallow pitched roofs, with a pitch of 5 degrees and over.


Powerlon UltraPerm is supplied with preprinted marking lines for both roof pitch and overlaps, making installation quicker and easier.

Full illustrated installation instructions are supplied with each roll.

Powerlon Tapes, including Penetration Tape, FR Aluminium Tape and Double-sided Jointing Tape, complement the Powerlon UltraPerm range for professional installation. See Powerlon Accessories.

Powerlon UV Low Pitch is supplied with full installation instructions. Proprietary accessories including detailing pieces, adhesives and tapes should be used for correct installation and to validate any warranties. See Powerlon Accessories.


BBA Certification The British Board of Agrément is one of the UK’s leading notified bodies offering approval, certification and test services to manufacturers of products and systems supplying the construction industry. Only products and systems that have passed a series of comprehensive assessments – including laboratory tests, on-site evaluations, quality management checks and inspections of production are awarded an Agrément Certificate.

CE Marking is required for many products. It

  • shows that the manufacturer has checked that these products meet EU safety, health or environmental requirements
  • is an indicator of a product’s compliance with EU legislation
  • allows the free movement of products within the European market

Flame Retardancy

Class E EN 1301-1 European Standard EN 13501-1 provides the reaction to fire classification procedure for all products and building elements.

DIN 4102 B1 Fire behaviour of building materials and elements - Classification of building materials - Requirements and testing.