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COVID-19 UPDATE

Due to the current situation, Lightweight Tiles are regrettably closing our factory on a temporary basis. New orders can still be made online but will not be dispatched until after the 20th April 2020 at the earliest.

Thank you for your support and if you have any urgent queries, please contact us on [email protected] 

Permavent Max All Zones Breathable Membrane

Grey Granulated Roof Tiles » Permavent Max All Zones Breathable Membrane

£60.00  Excludes VAT

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We aim to dispatch this product within 28 days (depending on availability).

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  •     Permavent Max All Zones - High performance breathable membrane
  •     Suitable for all wind zones regardless of fitting method
  •     Conforms to BS5534
  •     LABC registered
  •     3 layers membrane
  •     UV stable for 3 months
  •     For use on any types of roofing/walling applications
  •     Available in 1m x 50m

 

Permavent breathable membranes must be installed in accordance to BS 5534 Code of Practice. The installer must ensure compliance with the relevant building
regulations.
Our membranes are designed as a secondary barrier to wind driven rain / snow and should not be considered a primary waterproofing layer. Whilst they can
withstand UV exposure for up to 3 months, it is best practice to install the primary waterproofing finish (e.g. slates, tiles etc) as soon as possible.
Permavent membranes must be installed the correct way up, with the Permavent logo printed side uppermost.
For tile and slate roof applications the membrane should be laid horizontally across the rafters starting at the eaves and secured in place with either batten or
membrane tape.

 Recommended Overlap

The below table shows you the coverage you will need of our breathable membrane using the square metre of your roof area.  Based upon an industry standard headlap of 150mm. 

Rafter Pitch Not Fully Supported Fully Supported
12.5° - 14° 225mm 150mm
15° - 34° 150mm 100mm
35° and above 100mm 75mm


Specifications

Weight, g/m2

150

Water tightness, class

W1

Water vapour transmission (sd),m

0.02

Maximum tensile force (MD), N/50mm

350

Maximum tensile force (CD), N/50mm

240

Elongation at max. tensile force (MD), %

70

Elongation at max. tensile force (CD), %

70

Resistance to tearing MD (nail shank), N

140

Resistance to tearing CD (nail shank), N

230

 

 

Permavent membranes are suitable
for use in all applications as described
in BS 5534.
For use on all types of domestic and
commercial roofing and walling
applications, including:

  • COLD NONVENTED
  • TRADITIONAL HYBRID
  • COLD VENTED
  • SCOTTISH AND FULLY
  • BOARDED APPLICATION

 

NB, for more complex roofs, or where you have detailing; you will use more membrane:

  • Ridge lines - on a duo-pitch roof, the membrane overlaps 150mm on both elevations. 
  • Abutments (Wall/Chimneys) - the membrane continues up the vertical a min 75mm. 
  • Valleys- you will utilise more membrane depending on the complexity.

 

I had been looking for a few years for a new roof for my conservatory as it was too hot in summer and too cold in winter to use. I had had quotes over £11,000 for a new complete roof, removing the glass, which I thought was pointless. The glass acts as insulation and would be a huge waste of money because it would of been just thrown in the bin.

Being a Mechanical Engineer, I worked out that if I could find something lightweight and looked like the roof fitted to my house, it would be a great idea for the new roof. The weight loading for the conservatory was worked out to withstand the extra load of a few feet of snow, turned to ice, so I knew the extra weight of a lightweight roofing system would be fine.

I found Light Weight Tiles, http://www.lightweighttiles.co.uk/ by chance, on searching the net. When I saw that the tiles weighed in at 6 kg per square metre, I knew they were not a problem for my conservatory and with the choice of different finishes, I was able (having purchased the sample pack) to choose a tiles that matched my house roof.

I could of fitted the tiles myself but felt it was a better idea to use one of their recommended fitters.

After striking a great deal with the fitters, they came and did the job. It only took 6 hours to do my 28 square metre conservatory and it looked fantastic. I did have the inside done at the same time with simple white panelled pvc covering, which helped with deflect ting the light and finished the job off perfect.

I am so pleased with the finished roof and it has made our conservatory useable all year round.

I would highly recommend Light Weight Tiles to anyone wanting a simple, cheap and beautiful way to turn their conservatory into a useable room.

And the added bonus is, the tiles are made from recycled materials.

- P Fryer , Weston Super Mare

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