The municipality of Kapelle chose Noistop noise fences due to its earlier positive experiences gained from a similar system which was installed in 2010 alongside 200 m of the A58. As Melvin Poppe, Civil Engineering project leader at the municipality of Kapelle says: “The system performs superbly and achieves the required reduction in noise. It's also a modular system, the elements of which are easy to install and have a long lifespan. The system is suitable to allow greenery to grow alongside it, which is what we are going to do again. All of Zuidhoek is a sustainable district, and this contributes to the green appearance that we want to achieve here. Naturally, the fact that it is a sustainable and circular product was an absolute prerequisite. Therefore we also chose Noistop because it is the complete package. According to our calculations, the fence needs to be 1.35 m high, which gave us a noise level of 53 dB, whereas the preferred limit value is 55 dB.
Noistop noise fences consists of specifically engineered stone wool elements enclosed in steel frames. The installation of the sound barrier was carried out by H2 Groen, which is part of H2 Infra. Landscaper Daan Ras: “We also installed the previous sound barrier along the A58, but at the time the decision was made to use hardwood posts. Based on increased insight, on this new project, we have used steel H-sections, between which the elements fit, with a tolerance of 3 mm. It's a little more expensive, but has a much longer lifespan. Once the sections were installed, it was easy to move the panels into place by using a crane.
Hermetically sealed structure
The sections are sunk one and a half metres into the barrier. In between, there is a layer of sand, stabilised with a horizontal concrete edge on top. Daan Ras: “A band is glued on top of that, to which the first screen connects, with another band on top of that for the second screen and the protective cap on top of that. Using this technique, we managed to achieve a hermetically sealed barrier. We had scheduled three weeks for installation, but in the end we finished it in twelve days. In other words, we were able to speed up the chain. We had already begun to attach the bands while the posts were still being installed, and before that was completed, we started to install the fences. Elements that were delivered in the morning were often already installed the same afternoon. When the poles are firmly affixed, the installation of the stone wool elements is literally a piece of cake.
Exceptional acoustic qualities
The easy to install panels have a sound-absorbent core of water-repellent and UV-resistant stone wool elements, enclosed in steel or wooden frames in various versions and colours. The fences with steel frames are exceptionally suitable for planting, to give a natural appearance. Noistop combines exceptional acoustic qualities (sound absorption and noise protection) with a sleek Scandinavian design. The noise fences are thin and the modular system is available in various dimensions, so that in any environment in which they are fitted, depending on height and location, Noistop panels deliver a noise absorption of between 8 and 11 dB.