ISOTEC Specialist Waterproofing Kortholt GmbH
Frankfurt-based waterproofing specialist handling moisture and damp issues in residential and older buildings.
What customers love
- Meticulous, clean workmanship with tidy job sites throughout
- Staff explain each step clearly during the renovation process
- Professional consultations that identify causes and provide quotes on-site
Best for
Owners of older buildings needing reliable damp-proofing or balcony waterproofing.
Attribute scores
Recent reviews
From the initial consultation to the final execution, we were completely satisfied. We would particularly like to emphasize how our concerns and questions (and there were quite a few) were addressed from the very beginning, and how cleanly and conscientiously the tradesman carried out the work on site. We can wholeheartedly recommend Isotec Kortholt 👍🏻
I very rarely leave reviews, but if any company deserves one, it's Kortholt. The service, planning, and execution of the work were absolutely outstanding. Starting with Mr. Wirth, who provided us with fantastic and professional advice. The employees are incredibly courteous, friendly, and knowledgeable. I've rarely experienced such clean, meticulous, and conscientious work...and all done with a smile. Many thanks to the entire team! Absolutely fantastic...keep up the great work!!
I hired ISOTEC to renovate my balcony because moisture had penetrated it, causing it to drip from below. During the initial consultation, the specialists were able to clearly identify the cause and provided me with a suitable quote on the spot. At the agreed-upon time, Mr. Ivo Dujakovic and his colleague arrived to carry out the work. They both did an excellent job, completely and meticulously renovating the balcony within a week. Throughout the entire renovation process, they explained each step to me and clearly demonstrated their procedures. Three weeks after completion, I can confirm that the balcony easily withstands even heavy rain. I highly recommend ISOTEC's transparent, reliable, and high-quality work!
My uncle has hired Abdichtungstechnik Kortholt GmbH for the second time. The first time was almost 10 years ago. The initial consultation was professional and friendly. The employees arrived on time for the appointment. The work was carried out flawlessly, and the site was left absolutely clean. They also maintained a very clean work environment throughout the project.
I had some water issues in my old building (Ca. 1900). Mr. Bukal and his teams took really good care of us and the building, very timely, super professional and competitive in their pricing.