Permo Extreme

Product Code: KU0171-11 KU0171-11-25

Part of The Specialist membrane range, Extreme is the UK's leading low pitched roof underlay. This makes it the perfect solution for complex roofs, whilst it is also fitted with self-adhesive tape.

  • Offers design flexibility by enabling you to use tiles below their recommended minimum pitch
  • The fleece layer greatly reduces the risk of condensation forming
  • Independently tested to 1 in 50 year storm conditions, whilst the self-adhesive tape creates added strength and durability for a water and air tight seal
  • 240 g
    Klober Permo Extreme Roll
    Klober Permo Extreme Underlay
    Klober Permo Estreme Low-pitched Membrane
    Klober Permo Extreme Membrane Installed

    Compatible with:

    More Information

    Part of The Specialist membrane range, Permo Extreme is a tear-resistant roof underlay designed for use on low pitched roofs, down to a minimum roof pitch of 12.5° for interlocking tiles, 15° for slates and 22.5° for plain tiles. This makes Permo Extreme roof membrane the perfect solution for extensions and lean-tos, particularly as the roll is available in a half-size for smaller projects. The membrane is fleece lined to control condensation, whilst it’s fitted with self-adhesive tape, which provides a permanent seal of overlaps and immediate weatherproofing protection against wind, rain and snow. Permo Extreme is also highly temperature resistant from -40°C to +100°C and can be deemed as a primary barrier when installed with Klober accessories and covered by a UV protected layer such as tiles or slates.

    Specifications

    Technical Data
    Colour
    Dark Blue
    Minimum Pitch
    12.5
    Wind zones BS5534 2014 Annex A
    Zones 1-5
    Fire Rating
    E
    Dimensions and Weights
    Width
    1.5m
    Length
    50m
    Coverage
    75m2
    Packaging
    Number of Pieces per Carton/Pack
    1
    Number of Carton/Pack on Pallet
    12
    Number of Pieces per Pallet
    12
    Weight per Piece
    18 kg
    Weight per Pallet
    216 kg
    Technical Data
    Colour
    Dark Blue
    Minimum Pitch
    12.5
    Wind zones BS5534 2014 Annex A
    Zones 1-5
    Fire Rating
    E
    Dimensions and Weights
    Width
    1.5m
    Length
    25m
    Coverage
    37.5m2
    Packaging
    Number of Pieces per Carton/Pack
    1
    Number of Carton/Pack on Pallet
    30
    Number of Pieces per Pallet
    30
    Weight per Piece
    9 kg
    Weight per Pallet
    270 kg

    Installation

    • Butylon tape should be laid on top of the membrane and underneath where the battens are due to be fixed - it is essential that the batten nail passes through the tape
    • An unsupported underlay should provide a drape between rafters sufficient to ensure that water will run away from the batten fixing nail penetrations allowing draining from the eaves gutter
    • Contact between the membrane and the roof covering should be avoided during and after installation
    • Permo Extrreme RS SK2 should be laid with a maximum drape of 15mm
    • Permo Extreme should be taped to an underlay support tray should be used at eaves to avoid ponding behind the fascia board and to provide a drip into the guttering

    Area of application

    • HR membrane so requires ventilation
    • Minimum roof pitch of 12.5° for interlocking tiles, 15° for slates and 22.5° for plain tiles
    • Wind zones 1-5

    Standards and Certifications

    10 Year Guarantee
    10 Year Guarantee
    CE

    Low Pitch Roofs and Performance

    When the right membrane solution is specified and installed correctly, a low pitch roof can be constructed without concern for future performance.

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    When installing roofing membrane products, it’s important that steps are taken to ensure the process is safe and efficient. Here we have compiled seven top tips to think about before you get started

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