The best flat roof roofing material is undoubtedly an individual sheet of rubber tailor made for weather-proofing flat roofs, such as Firestone’s EPDM product.
This is laid directly onto roof boarding, itself supported by the roof rafters and nagging. Insulating material is normally laid in the space between the two, and if you are renewing your flat roof anyway you might as well take the opportunity 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 the most famous material for a fresh flat roof was bituminous felt laid in three layers, the initial layer nailed down and top of the two bonded to the main one beneath with mastic bitumen. With respect to the material used, this could mean heating a good bitumen-based compound to create it liquid, and pouring it onto the underlying felt and spreading it evenly over the whole section of the roof.
Then you had to wait for the compound to cool before applying another layer, and by the end spreading a layer of stone chippings on the roof and bonding it with a chipping compound, this being to reflect natural sunlight and stop the felt and bitumen degrading quickly.
This was altogether a rather messy, complicated and time-consuming job best left to the professionals. In addition, there have been several stages where it was 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 might be very difficult and messy to determine 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 easily get by way of a weakness in the bitumen felt and travel along a rafter before descending to the ceiling board below.
The brand new generation of rubber-based flat roofing systems are far superior. Assuming 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 current price is around ï¿½6.65 per square metre.
Most suppliers slice the material to the exact size and shape that you require so are there no unnecessary joins, meaning no weaknesses and an extremely long-lasting, leak-proof roof.
The vital the main whole process is to ensure that there are no gaps between your rubber roof and any existing pitch roof where rain may penetrate. To ensure you can find 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 underneath 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 simply glued onto the roof boards and sealed where appropriate with metal brackets or bitumen so that rain penetration is impossible. Mind that Roof Cleaning in Nottingham covers the entire underneath of the rubber so as to avoid bumps in the surface that could obstruct the drainage of the water away.
Rubber roofs have been proven to last for more than 50 years under all weathers, so that it really is the only flat roof roofing material that you should consider when deciding on a fresh flat roof.