Limit risks with NIS as a team partner

The requirements for an industrial or communal roof are extremely complex and are subject to a multitude of building guidelines and regulations. As part of the outer skin, it primarily serves as weather protection and thermal insulation. With our flat roof services, we help you to safeguard the functionality of the roof sealing and to protect it in the long term - from commissioning throughout the entire service life.


Dichtigkeitsprüfung | NIS Flachdach-Prüfungen | RAL und ISO zertifiziert  | vertragsneutral und unabhängig

Leak test: for making sure you have a safe status quo.

With the independent and RAL-certified HV-SLD leak test, you receive an independent status quo of your roof waterproofing before handover or after each construction phase. Our inspection report provides you with reliable proof of the quality of the work carried out by the contractors. As the client, only you have the right to information on the test result and only you receive the documentation of the measurement results. This gives you the opportunity to have any damaged areas reworked before handover.

On request, you can also receive our innovative passive monitoring system R.O.S.I.. The battery-free and maintenance-free R.O.S.I. sensors are available free of charge as part of our service. By combining the NIS leakage test with the R.O.S.I. sensor technology, you not only receive proof of the condition of the roof sealing on the readout date, but also insight into the insulation layer package. This can prevent consequential damage from leaks and prevent cost-intensive restructuring work.

The independent proof to show that your roof sealing is intact:


Leckageortung | NIS Roof Management | Kostensparend, effizient, bewährt | Flachdach-Experten

Leak detection - rapid assistance throughout Europe in the event of damage.

With our non-destructive methods of leak detection and moisture measurement, damaged areas can be localised quickly, precisely and cost-effectively. The result of the test is documented in a measurement report and serves as a basis for the necessary repairs. This allows the repair effort to be estimated precisely in advance and the costs to be calculated transparently.

Effectiveness that pays off: Our intelligent leak detection system can be applied to almost all roof sealings. Leaks can also be located on roofs with gravel ballast or greenery without having to remove them over a large area. Prior to the test, we will provide you with an assessment of the expected accuracy of the test result based on a grading procedure.

  • Fast, pinpoint localisation
  • Non-destructive methods
  • Detailed measurement report 
  • Suitable for almost all roof waterproofing 
  • Highest transparency in the testing process

NIS Safety | NIS Roof Management | Ihr kompetenter Partner für Flachdach-Sicherherheit

NIS Safety - Your specialist for flat roof safety.

According to the guidelines of BG BAU (German Builder’s Union), the entire roof surface is basically considered a danger zone and there are a large number of legal regulations that govern working at height and protection against falling and falling objects. Both during the construction phase and for later use, maintenance and care of the roof surfaces, planners and builders must provide suitable fall protection.

As a RAL-certified specialist company, we undertake the planning, installation, maintenance and testing of fall protection systems from all manufacturers. With our digital documentation, we record all the necessary information as proof of the professional execution of the work in accordance with the currently valid standards and guidelines. Make it easy and safe for yourself by using our nationwide service from a single source.


NIS Roof Services | NIS Roof Management | Kundendienst rund ums Flachdach | Industrie und Gewerbe

Roof Services - Secure warranty. Exclude liability risks.

From maintenance to green roof care and securant inspections: Regular roof maintenance by an expert ensures that the roof is in a safe and proper condition and that traffic safety is guaranteed. This is particularly relevant when dealing with the insurance company when it comes to damage following environmental events. In the event of damage, it is the owner's responsibility to prove that all necessary and reasonable precautions have been taken.

With regard to installed safety systems, an annual inspection is mandatory in order to maintain the authorisation for use. Even during the planning and construction phase, remember to take into account necessary maintenance work and thus not only preserve your warranty claims against the executing companies and the insurance companies, but also exclude liability risks within the scope of your operator obligation.

Whether it's roof maintenance, green roof care or sewer inspections - we'll be happy to take on these services for you and carry out the work in compliance with all statutory rules and regulations. You will receive a comprehensive maintenance report from us after each maintenance run with documentation of the work carried out. This way you always have a comprehensive overview of the status quo of your roof area.


NIS Bestandsaufnahme und Katalogisierung | NIS Roof Management | Alles im Blick, auch aus der Luft

Roof Services - Inventory & Cataloguing

Full documentation is worth its weight in gold when you need it. With our interactive roof area cataloguing by means of drone flight, we create 3D documentation for you with true-to-scale, digital image representation. You will receive an exact inventory of the roof surface with all height differences of the superstructures even from inaccessible objects.

Transparency really doesn't get any simpler than this. It’s simply practical to have the roof surfaces on your desk in true detail. Because this way you can conveniently view every square metre of the flat roof and its current status quo for your planning activities.

  • Interactive roof area cataloguing 
  • State-of-the-art drone technology
  • 3D documentation
  • Also for inaccessible objects
  • True-to-scale, digital image representation

NIS Roof Monitoring| NIS Roof Management | R.O.S.I. Sensortechnik | zerstörungsfreies Auslesen der Feuchtedaten

R.O.S.I. - ingenious added value for your customers.

With the maintenance-free and battery-free R.O.S.I. moisture sensors, we offer you a comprehensive monitoring system that enables the non-destructive reading of the moisture values in the roof layer package at any time. With the help of R.O.S.I. sensor technology, you can not only inspect your roof surface for integrity from the outside, but also gain insights into your insulation layer package. This allows you to recognise when there is need for action at an early stage in the event of damage.

Lay the foundation for long-term value retention of your roof waterproofing during the construction phase. The R.O.S.I. sensors are available free of charge for NIS leak testing. This means that there are no additional product costs to be calculated. The sensors are installed by the roofer. In short: Your roof - your innovation. With R.O.S.I. the flat roof 4.0. becomes reality.

  • Comprehensive monitoring system 
  • Maintenance-free, battery-free humidity sensors
  • Free of charge for leak testing
  • Easy installation by the roofer