Grey Granulated Roof Tiles » Permavent Max All Zones Breathable Membrane
£60.00 Excludes VAT
We aim to dispatch this product within 28 days (depending on availability).
Work out how many tiles you need for your roof conversion
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.
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 |
|
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:
NB, for more complex roofs, or where you have detailing; you will use more membrane:
“ 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
