The best flat roof roofing material is undoubtedly a single sheet of rubber custom made for weather-proofing flat roofs, such as for example Firestone’s EPDM product.
This 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 are renewing your flat roof anyway you may as well take the chance of renewing that concurrently.
This will almost certainly be the recommendation you obtain from any reputable builder or roofer advising you on replacing your existing flat roof.
Until recently Roof moss removal near me for a new flat roof was bituminous felt laid in three layers, the first layer nailed down and top of the two bonded to the one beneath with mastic bitumen. With respect to the material used, this may mean heating a solid bitumen-based compound to create it liquid, and then 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 the next layer, and by the end spreading a layer of stone chippings over the roof and bonding it with a chipping compound, this being to reflect the sun’s rays and stop the felt and bitumen degrading quickly.
This was altogether a fairly messy, complicated and time-consuming job best left to the professionals. In addition, there were several stages where it had been very easy to fail to make the roof weather-proof, e.g. where in fact 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 might be very difficult and messy to learn exactly where the rain was getting in. Seldom would the manifestation of the leak on the ceiling of the area below be directly below the source of it. Water could easily get through 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. When you have reasonable DIY abilities then you can 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 slice the material to the exact shape and size that you require so are there no unnecessary joins, meaning no weaknesses and an extremely long-lasting, leak-proof roof.
The vital section of the whole process is to make sure that there are no gaps between the rubber roof and any existing pitch roof where rain may penetrate. To ensure there are no problems it is critical to run the rubber material up and beneath 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 within the pitch roof.
Also, make sure that the prevailing slope of the flat roof towards the guttering or other method of water escape is maintained. The rubber is merely glued onto the roof boards and sealed where appropriate with metal brackets or bitumen so that rain penetration is impossible. Mind that the glue covers the entire underneath of the rubber so as to avoid bumps in the top which 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 real flat roof roofing material you need to consider when deciding on a fresh flat roof.