The best flat Roof Roofing material is without question a single published of plastic made to order 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 mái tôn khung sắt anyway you may as well take the opportunity of renewing that at the same time.
This will in all probability are the recommendation the user gets from any reputable builder or roofer advising you on replacing your existing flat roof.
Until recently the most popular material for a new flat roof was bituminous felt laid in three layers, the first layer nailed down and the higher two bonded to the one beneath with mastic bitumen. Depending on the material used, this could mean heating a solid bitumen-based compound to make it liquid, and then tipping it onto the underlying felt and spreading it evenly over the whole area 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 over the roof and bonding it with a chipping compound, this being to reflect the sun’s rays and prevent the felt and bitumen degrading quickly.
This is altogether a rather messy, complicated and time-consuming job best left to the professionals. In addition, there were several staging where it was very easy to fail to make the roof weather-proof, e. h. where the edge of the felt met the existing tile or record roof of the pitch roof.
On top of that, if, or rather when, there developed a problem in the flat roof, it would be very difficult and messy to find out exactly where the rain was getting in. Rarely used features would the symptoms of the problem on the hallway of the room below be directly below the cause than it. Water could get by having a weakness in the bitumen felt and travel along a rafter before descending to the hallway board below.
The new generation of rubber-based flat roof systems are far superior. If you have reasonable DIY abilities then you can probably diy, with one other person to assist. You can easily find a local supplier of plastic flat Roof Roofing material online, and the current price is only around £6. 65 per rectangular metre.
Most suppliers cut the material to the exact shape and size that you require so there are no unnecessary joins, meaning no flaws and an extremely long-lasting, leak-proof roof.
The vital perhaps the whole process is to ensure that there are no gaps between the plastic roof and any existing pitch roof where rain could possibly pierce. To ensure there are no problems it is vital to run the plastic material up and under the tiles or slates of the adjoining pitch roof so that any rain dripping from the lower-most line falls onto the plastic, with no possibility of it over-lapping the edge and getting underneath the pitch roof.
Also, make sure that the existing slope of the flat roof towards the guttering or other means of water escape is maintained. The plastic is simply glued onto the roof boards and sealed where appropriate with metal brackets or bitumen in a way that rain puncture is impossible. Mind that the glue covers the full underneath of the plastic so as to avoid bumps in the surface that could obstruct the drainage of the water away.
Plastic roofs have been shown to last for above 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.