The roof is undoubtedly one of the most important elements of the entire house. The roof drain plays an important role. It must be selected for the structure. This will provide a fully sealed roof drainage system. How to choose the best roof drain?
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What is a roof drain?
The roof drain should be solidly made and finished. The key role is played by a hermetic connection with a waterproof layer. This provides protection against contamination. Interestingly, it can be heated. Heating cables are used for this purpose, but they must be self-regulating. The most important role of a roof drain is to drain water. More and more investors are opting for flat roofs. Their price is lower, that's a fact, but on the other hand, there is a big problem with proper water drainage, which is the main task of such a roof drain.
Roof inlet can be installed even in ceilings thanks to the appropriate outlet pipe. Note that inlets can be used on flat roofs with waterproofing made of APP or SBS type weldable roofing felt or EPDM type membrane. This inlet should be installed at the lowest point of the flat roof. The main structures must be attached to the substructure.
In addition, special attention should be paid to ensuring that the entire superstructure of the inlet is evenly seated over the entire roof surface. However, it cannot be installed while pouring the reinforced concrete roof slab. In such a case, it is necessary to wait until the concrete has completely set, then drill a hole in the reinforced concrete slab with the diameter of the inlet and install it. The roof inlet must be installed in such a way that maintenance and cleaning are possible. It is best to perform maintenance inspections at least twice a year.
Which roof drain should I choose?
At the very beginning, it is necessary to mention the regulations, namely in the case of medium-rise or higher buildings, i.e. above 12 m, it is necessary to make slopes that allow water to drain into internal downpipes. The roof drain is of great importance. So how do you find the best one? We distinguish vertical drains, which drain water directly into rainwater pipes. Horizontal drains are also available, which first drain water to a sink basket and only then to the sewage system.
When choosing, you should also pay attention to the heating collar, which can be built in. This prevents the roof drain from freezing and also allows it to remain passable at any time of the year. Models without a collar are also available. Do not forget how important the integrated collar plays, which affects the tightness and continuity of the waterproofing layer. It protects the basket very well against clogging and contamination. Since the inlet is the lowest element of the roof, it must be resistant not only to mechanical damage, but also to contamination, low and high temperatures, or intense solar radiation. The roof drain should also be selected to match the roof's waterproofing layer. It is important that the roof drain with a collar is made of a material compatible with the material of the waterproofing layer.
For this reason, the HL DN110 roof drain is worthy of attention. It is very easy to keep clean. It is made of plastic. It will work even in the case of very heavy rainfall.
A good choice is also the HL 110mm roof drain with a bituminous collar . This roof drain can be adapted to various roof layer layouts, including classic, inverted and green roofs.
You can also opt for the KESSEL DN 100 roof drain . It is resistant to temperatures up to 400 degrees Celsius and corrosion. It also meets the highest acoustic standards. Pay attention to the pressure sealing collar with stainless steel screws, which ensures even greater tightness.
How many emergency transfers should be used?
Emergency drainage can be done inside the building using a separate piping system. However, this solution is not practical and can cause many problems. For this reason, an external drainage system will work better. In this case, rainwater from the roof must be drained without connecting to the piping system. The right inlet must be selected. The number of emergency overflows depends on the roof area.
The DIN 1986-100 standard should be followed, which states that one inlet and one emergency drainage should be used for each roof depression. It is also possible to use a sufficient number of inlets so that the water flow to the emergency drainage is efficient. In the case of flat roofs, at least two outlets or one outlet and one emergency overflow should be provided for each roof surface. In this way, even water from storm rain will be effectively drained. If flat roofs with cornices or gutters without eaves are used, they should be provided with overflow and emergency outlets.
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