The best flat roof roofing material is undoubtedly an individual sheet of rubber custom made for weather-proofing flat roofs, such as for example Firestone’s EPDM product.
Roof cleaning near me 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 the most used material for a new flat roof was bituminous felt laid in three layers, the initial 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 solid bitumen-based compound to make it liquid, and then 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 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 the sun’s rays preventing 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 have been several stages where it was very easy to fail 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 will be very difficult and messy to discover 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 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. 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 slice 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 the rubber roof and any existing pitch roof where rain may penetrate. To ensure there are no problems it is vital to run the rubber material up and under the tiles or slates of the adjoining pitch roof in order that any rain dripping from the lower-most row falls onto the rubber, with no possibility of 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 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 that could obstruct the drainage of the water away.
Rubber roofs have been shown to last for more than 50 years under all weathers, so it really is the only flat roof roofing material that you need to consider when deciding on a new flat roof.