The contemporary flat roof coating


Flat roofs must be re-sealed at regular intervals. For a long time bitumen membranes were considered the ultimate. However, as in many other areas, flat roof coatings have made tremendous progress on the products now available. The flat roof coating made of liquid plastic is one of the best flat roof seals that are currently available. However, there are also some things to consider.

For sealing flat roofs, there are various techniques to choose from.

  • Sealing with bitumen
  • Sealing with EPDM rubber
  • Sealing with a liquid coating (plastic)

For a long time, bitumen waterproofing was considered the most important sealing technique for flat roofs. But now there are liquid coatings that are far more efficient. These flat roof coatings are made of elastomers and have similar properties as films made of the synthetic rubber EPDM.

  • long-term resistance to water
  • resistant to thermal loads
  • UV protection
  • ozone protection
  • resistant to mechanical effects
  • resistant to weathering

The advantages of liquid flat roof coating

All these advantages are also offered by a conventional bitumen roof. However, many protective functions have to be taken over by greening or gravel packing. The flat roof coating made of liquid plastic has all these advantages without additional aids.

Only quality products promise what they hold!

However, you must rely on high-quality products when choosing liquid plastics. Under no circumstances should you prefer supposedly bargain offers. Inferior liquid plastics often come with unforeseen side effects. They become porous and fragile, contract and shrink, etc.

Long been standard in the industry

How good high-quality flat roof coatings made of liquid plastic on the other hand prove their popularity in industrial buildings. In industrial and commercial flat roof constructions, liquid plastic flat roof coatings have long been standard.

Finally interesting for DIY enthusiasts

So far, they have not made it to private homeowners because manufacturing and processing costs have long been exorbitantly high. Fortunately, this has changed significantly in recent years. Meanwhile, liquid plastic as an efficient flat roof coating is also interesting and attractive for the conventional DIY enthusiast.

Sealing the flat roof with liquid plastic

Even the processing is very easy. The surface is cleaned and then the liquid coating is applied. If necessary, you can even leave old bituminous coatings on the flat roof. The flat roof coating made of liquid plastic can be applied differently.

  • in the spray process
  • by swiping
  • by spreading with a slider

Reinforcement by fleece

In order for the flat roof coating to achieve better stability, a reinforcement fleece is incorporated. This is also used for wall connections and other penetrations such as antennas and fireplaces. Even the gullies and flat roof drainage systems can be worked out together with the fleece with the plastic coating.

The seamless flat roof coating

Probably the most salient advantage is already revealed during the application of the liquid coating: you coat your roof completely seamlessly in this process. The coating gives a single, homogeneous surface without any welds. At penetrations and wall connections, the coating can also be generously attached to the top.

Long service life guaranteed

Further advantages will then develop over the years. In contrast to a bituminous roof, which has to be re-sealed every 10 to 15 years on average (and, of course, depending on individual conditions), the flat roof coating made of liquid plastic lasts much longer.

Tips & Tricks

Of course, you can also apply a gravel pack to the liquid flat roof coating. A greening of the roof is also possible.

Of course, if you want to seal your flat roof with bitumen, there are of course numerous contributions available in the house journal. For example, for flat roofing with bitumen.


Video Board: Flat Roofing System Review