The best flat roof roofing material is without a doubt a single sheet of rubber custom made for weather-proofing flat roofs, such as Firestone’s EPDM product.
That is laid directly onto roof boarding, itself supported by the roof rafters and nagging. Insulating material is generally laid in the space between your two, and if you’re renewing your flat roof anyway you may as well take the chance of renewing that concurrently.
This will almost certainly be the recommendation you receive from any reputable builder or roofer advising you on replacing your existing flat roof.
Until recently the most popular material for a fresh flat roof was bituminous felt laid in three layers, the first layer nailed down and top of the two bonded to the main one beneath with mastic bitumen. Depending on the material used, this may mean heating a good bitumen-based compound to create it liquid, and pouring it onto the underlying felt and spreading it evenly on the whole section of the roof.
Then you had to wait for the compound to cool before applying another layer, and at the end spreading a layer of stone chippings over the roof and bonding it with a chipping compound, this being to reflect natural sunlight and prevent the felt and bitumen degrading quickly.
This was altogether a rather messy, complicated and time-consuming job best left to the professionals. In Roof moss removal near me , there were several stages where it had been very easy to neglect to make the roof weather-proof, e.g. where the edge of the felt met the prevailing tile or slate roofing of the pitch roof.
In addition, if, or rather when, there developed a leak in the flat roof, it could be very difficult and messy to find out exactly where the rain was getting in. Seldom would the manifestation of the leak on the ceiling of the room below be directly below the foundation of it. Water could get by way of a weakness in the bitumen felt and travel along a rafter before descending to the ceiling board below.
The new generation of rubber-based flat roofing systems are far superior. If you have reasonable DIY abilities then you can certainly probably do it yourself, with one other person to assist. You can easily find a local supplier of rubber flat roof roofing material online, and the existing price is around ï¿½6.65 per square metre.
Most suppliers cut the material to the exact shape and size that you require so there are no unnecessary joins, meaning no weaknesses and an extremely long-lasting, leak-proof roof.
The vital part of the whole process is to make sure that there are no gaps between the rubber roof and any existing pitch roof where rain could possibly penetrate. To ensure you can find no problems it is vital to run the rubber material up and under the tiles or slates of the adjoining pitch roof so that any rain dripping from the lower-most row falls onto the rubber, without chance for it over-lapping the edge and getting underneath the pitch roof.
Also, make sure that the prevailing slope of the flat roof towards the guttering or other means of water escape is maintained. The rubber is simply glued onto the roof boards and sealed where appropriate with metal brackets or bitumen in such a way that rain penetration is impossible. Mind that the glue covers the whole of the underneath of the rubber to be able to avoid bumps in the surface that could obstruct the drainage of the water away.
Rubber roofs have been proven to last for well over 50 years under all weathers, so it really is the only flat roof roofing material that you need to consider when deciding on a fresh flat roof.