Klober Permo Forte: 50m x 1.1m

  • A super-strong permeable membrane with internal reinforcement.
  • Allows the roof to breathe and shed water vapour, while remaining fully watertight.
  • Material: Reinforced, microporous polythene film with outer layers of bonded polypropylene.
  • Roll Weight: 8.5kg.
  • Roll Size: 50 x 1.1m (55m2).
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£134.95 Inc. VAT

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Free Delivery for orders over £50 

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Product Details

Klober Permo Forte Breather Membrane

Klober Permo Forte has a unique plastic ripstop grid, which helps prevent tearing. A special inner layer allows water vapour to exit the roof space while preventing rainwater and moisture from entering the building. Each roll is 50 x 1.1m covering 55m². 

The durable, 4-layer fabric of reinforced microporous polythene film, with the outer layers of bond polypropylene. An internal reinforcing mesh makes this membrane tough and easy to handle. This extra-strong, vapour permeable underlay is suitable for installation on a warm or cold roof design.

Specification Value
Weight, g/m² 145
Water Tightness (Class) W1
Water Vapour Transmission (sd), m 0.03
Water Vapour Permeability g/m²/day 1342
Tensile Strength Longitudinal/transverse N/50mm 430/370
Nail Tear Strength Longitudinal/transverse N 320/340
Fire Rating Class E
Temperature  -40°C to +80°C
UV Exposure 4 Months
Vapour resistance, MNs/g-1 0.15

This breather membrane conforms with many standards including BS 3177, it is CE certified, holds a BBA certification (Cert No. 99/3622), and is covered by Klobers’ 10-year guarantee.

It is suitable to use in wind zones 1-4 if using battened laps and 1-5 if laps are secure with tape.

Wind Zones 

Product Delivery

Ashbrook Roofing offers free delivery for orders over £50 to United Kingdom postcodes excluding the Highlands, Islands and Ireland.

Delivery expectation for orders placed before 2.00pm (Mon - Fri) are:

You pay: £4.95
Delivery: 2-3 working days
For orders placed before 2.00pm (Mon - Fri)

FREE Delivery   
On all orders over £50
Delivery: 2-3 working days
For orders placed before 2.00pm (Mon - Fri)

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Prior to shipment, we’ll let you know of our estimated date of delivery. Don’t worry if you have made other plans or find this inconvenient.

If you can let us know a day in advance we’ll work with you to find a better alternative.

And remember, if you need help, have any concerns, or require a more timely delivery of your product(s), then simply give our customer services team a call on 01629 828500.

Or alternatively email us at customerservices@ashbrookroofing.co.uk and we'll do our very best to help

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Copyright 2021 Ashbrook Roofing and Supplies Ltd. (Harrison Way, Matlock, Derbyshire, DE4 2LF) Company Registration Number: 4549398 | VAT Number: 419721937 | Telephone: 01629 828 500 | Email: sales@ashbrookroofing.co.uk