How efficient is your flat roof really?

17.04.2025
The difference between a solid and a high-performance, durable roof is in the layer you don't see.
Kopie van Green Roof Revolution

A flat roof is an integral part of the building envelope. It is a complex structural layer that only really comes into its own if the underlying principles are taken into account in design and implementation from the very beginning.

Kopie van Vacature Dak

Building system

The performance of a flat roof is therefore in the layers you don't see. Insulation, vapour barriers, waterproofing, slope, detailing at eaves and penetrations... Each component determines long-term performance. An inadequate choice or implementation affects the whole.

The integrated operation of all layers in relation to their environment, function and lifespan is what our experts have in mind when they scrutinise your roof.
Brico Herstal

Cohesion between layers

A good flat roof starts with a smart construction. This usually consists of:

  • the supporting structure, which determines stability and deflection;
  • the vapour barrier, which prevents moisture from the interior from condensing in the insulation package;
  • the thermal insulation, which limits energy losses and contributes to comfort;
  • the waterproofing layer, which provides protection against precipitation and penetration;
  • and the finishing or utility layer, which is filled in according to the intended climate roof (blue, yellow, green, red or standard).

The interplay between these layers is crucial. One mistake - a continuous thermal bridge, an inaccurately executed penetration or an unsuitable combination of materials - can cause condensation, leakage or even structural damage.

Brico Herstal3
I Brico Herstal

Managing risks

Considering a roof as a system creates scope for:
✔ prevention of condensation and moisture problems;
✔ optimisation of energy performance;
✔ integration of user functions (green roof, parking, techniques);
✔ future-oriented construction (modular, demountable, circular);
✔ long-term reliability and easy maintenance.

Functional buffer

A relevant roof today does more than just protect. Think of rainwater harvesting, carrying solar panels, or buffering urban heat. That means: more loads, more detailing, more coordination between disciplines.

So a high-performance roof is not a set recipe, but a tailor-made suit in terms of construction techniques. The result of analysis, design, simulation, material study, regulatory review and execution expertise.
And let that be precisely the added value our flat roof specialists can bring to your roof.

Flat roof specialist +

Our commitment does not stop with technical detailing or site follow-up. We also actively participate in the wider conversation within the sector. For example, we actively participate in symposiums, sit on technical committees and are at the forefront of future-oriented initiatives such as the Klimaatdak and the Green Deal Nature-inclusive car parks.

Of course, we also assume our role as independent advisor, critical sparring partner and bridge-builder between theory and practice when we take care of your roof.

Zoonjens Waasland1

Vacancy

Are you the project architect who does not shy away from the complexity and challenges of a flat roof, but sees it as an opportunity to bring innovation and craftsmanship together?