Colter Fenster-Türen-Glas GmbH

We ordered new windows and electric sunshades from this company. The consultation was comprehensive and covered both topics in detail. In the showroom, we were able to see various sunshade systems in action, which helped us make our decision. The quote was transparent, and communication throughout the entire process was excellent. Installation was carried out by two separate teams – both worked professionally and in a coordinated manner. The windows are high quality, and the sunshades function perfectly. After several months of use, we can say: solid workmanship, good materials.

After water damage, we had to replace several windows at short notice. The company was able to offer us a consultation appointment relatively quickly. In their showroom, we were able to get a good overview of the different window options. The consultation was knowledgeable and took our time constraints into account. The delivery time was acceptable, and the installation went smoothly. The installers worked cleanly and removed the construction debris. The quality of the windows meets our expectations. A solid performance for a long-established, local company.

We were looking for new windows for our detached house in the spring and came across this company after some research. Their showroom in Düsseldorf is truly impressively large and offers a good overview of the various options. The consultation was thorough and not pushy – they took the time to answer our questions and address our requirements regarding thermal insulation and soundproofing. The quote was transparent and the calculations were easy to understand. The installation was professional, and the tradespeople worked cleanly. We are happy with the result and would definitely buy from them

We decided to modernize our house in the Mettmann district and needed new windows and a front door. Visiting the large showroom in Düsseldorf was very helpful in getting an overview. The consultation was competent, and they took ample time for us. We were particularly impressed with the advice on automation and smart home integration. The quote was fair. The installation was completed on schedule, and the tradespeople were friendly and professional. Now, several months later, we can say: good quality, excellent workmanship.

We bought our entire front door, including the side panel, here. Our first impression in the showroom was positive – many different models to touch and try out. The consultation was thorough; they showed us various options and also pointed out details such as fittings and security features. The quote arrived quickly and was itemized in detail. Installation was carried out professionally, as agreed upon. Minor adjustments were made on-site. A traditional, family-run business where you can tell they have a lot of experience.