Klober Permo Air Breather Membrane Felt 160gsm (50m x 1.5m Roll)
Product code: RKM54500
Part of The Specialist membrane range, Air is Klober’s most breathable and best-selling roof underlay. The air-open, vapour permeable roof membrane is available with or without self-adhesive tape.
Product description
Part of The Specialist membrane range, Permo Air is Klober’s most popular roof membrane. Air is a low resistance air-open roof underlay, suitable for pitched roofs. It is the ideal solution where there is a high risk of condensation forming in the roofspace; particularly during the drying out period of a building, making Permo Air the perfect solution for new builds. Permo Air roof membrane is available with or without self-adhesive tape, which creates a durable water and airtight seal, to reduce energy loss and provide strong protection against winds. Permo Air is BBA approved and NHBC accepted without the need for additional high-level ventilation, saving time and cost.
Product details
Length
50m
Width
1.5m
Weight
160gsm
Flame Retardancy
Class E (EN 13501-1)
Underlay Colour
Dark Blue
Water Vapour Transmission
Class W1
Tensile Strength (MD)
280 N/50mm
Tensile Strength (CD)
200 N/50mm
Nail Tear Resistance (MD)
140 N
Nail Tear Resistance (CD)
130 N
Vapour Transmission
0.009 (sd)
Elongation at MD
50%
Elongation at CD
70%
Brand
Klober
Manufacturer Brand Name
Klober
Manufacturer Product Code
KU0045-15
Key features
- Minimises the risk of condensation forming, particularly during the drying out period of a building, such as new-build properties
- BBA & NHBC approved as needing no additional high level ventilation, making it particularly cost and time effective
- Available with or without self-adhesive tape, which creates a durable weatherproof seal, to reduce energy loss and provide strong protection against winds
- Permo Air should be installed in line with the details set out in the BBA Certificate and in accordance with BS5534
- 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
- Should be laid with a maximum drape of 15mm
- An underlay support tray should be used at eaves to avoid ponding behind the fascia board and to provide a drip into the guttering
- Suitable for Cold and Warm Roofs
- Wind zones 1-3 with battened headlap. All wind zones with taped headlap