The best flat roof roofing material is undoubtedly a single sheet of rubber tailor 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 are renewing your flat roof anyway you may as well take the opportunity of renewing that simultaneously.
This will almost certainly function as recommendation you receive from any reputable builder or roofer advising you on replacing your existing flat roof.
Until recently the most used material for a new flat roof was bituminous felt laid in three layers, the first layer nailed down and the upper two bonded to the main one beneath with mastic bitumen. According to 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 hold back for the compound to cool before applying the next layer, and at 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 experts. In addition, there were 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 existing tile or slate roofing of the pitch roof.
On top of that, if, or rather when, there developed a leak in the flat roof, it would be very difficult and messy to discover wherever 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. Baton Rouge Roofing 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. Assuming you have reasonable DIY abilities then you can certainly probably do it yourself, with one other person to aid. 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 cut the material to the exact shape and size that you require so there are no unnecessary joins, meaning no weaknesses and an exceptionally long-lasting, leak-proof roof.
The vital section of the whole process is to make sure 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 vital 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 possibility of it over-lapping the edge and getting within the pitch roof.
Also, make sure that the existing 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 in order 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 that it really is the only real flat roof roofing material that you should consider when deciding on a new flat roof.