Permo Extreme

Product Code: KU0171-11

Permo Extreme

Product Code: KU0171-11

Permo Extreme is perfect for roof pitches as low as 12.5°

The fitted self-adhesive strips provides water tightness and strong protection against winds.

Can be deemed as a primary barrier when installed with Klober accessories and covered by a UV protected layer.

Fleece with capillary stop controls the formation of condensation water.

Offers design flexibility by enabling you to use tiles below their recommended minimum pitch.

Product Description

Permo Extreme is a tear-resistant roof underlay designed for use on low pitched roofs and complex roofs, down to a minimum roof pitch of 12.5° for profile 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.

Download our brand new Roofing Membrane Guide HERE.

Area of application

High resistance 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

Installation Tips

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 the rafters sufficient to ensure that any water will run away from the batten nail penetrations, allowing drainage into 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.


Product Video



Features
Product code
KU0171-11
Roof Type
Pitched Roofing
Product Category
Low Pitched Membrane
Subcategory
Membranes
Product Family
Permo
Width
1.5 m
Length
50 m
Weight
18 kg
Packaging
Coverage per roll
75 m2
Pallet quantity
20
Packaged weight
360 kg
Technical Data
Colour
Dark Blue
Material Description
Glueable two-layered with monolithic TPU coasting on tear-resistant PES fleece
Roof type application
Ventilated Low Pitched Roofs
Minimum pitch
12.5
Maximum pitch
90
Resistance to air penetration wind loads
< 0.1 m3/m2 h 49
Water vapour transmission (SD value)
0.08m
Water vapour resistance (MNs/g value)
0.08 MNs/g
Weight per m²
240
Water column
W1
Wind zones BS5534 2014 Annex A
1-2
Tensile Strength Longitude
310
Tensile Strength Transverse
360
Nail Tear Strength Longitude
215
Nail tear strength Transverse
200
Fire rating
E
Installation temperature
-40°C to +100°C
UV Stability
4 months
Driving rain test (TU Berlin) (DE)
Passed
Technical Data
Colour
Dark Blue
Material Description
Glueable two-layered with monolithic TPU coasting on tear-resistant PES fleece
Roof type application
Ventilated Low Pitched Roofs
Minimum pitch
12.5
Maximum pitch
90
Resistance to air penetration wind loads
< 0.1 m3/m2 h 49
Water vapour transmission (SD value)
0.08m
Water vapour resistance (MNs/g value)
0.08 MNs/g
Weight per m²
240
Water column
W1
Wind zones BS5534 2014 Annex A
1-2
Tensile Strength Longitude
310
Tensile Strength Transverse
360
Nail Tear Strength Longitude
215
Nail tear strength Transverse
200
Fire rating
E
Installation temperature
-40°C to +100°C
UV Stability
4 months
Driving rain test (TU Berlin) (DE)
Passed
Features
Product code
KU0171-11
Roof Type
Pitched Roofing
Product Category
Low Pitched Membrane
Subcategory
Membranes
Product Family
Permo
Width
1.5 m
Length
50 m
Weight
18 kg
Packaging
Coverage per roll
75 m2
Pallet quantity
20
Packaged weight
360 kg

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