Passion for the Craft

Founded in 1985 in Katwijk, our family-run company began as a local sewer service provider. Over the years, we’ve built up hands-on experience in unblocking, repairing, installing, and replacing all kinds of drainage and sewer systems.

In the past 18 years, we’ve shifted our focus to a more specialized line of work: internal pipe renovation—repairing from the inside out, without demolition. Getting here took extensive research and innovation, but it’s brought us to the forefront of our industry.

The Best Equipment, the Right Team

With advanced equipment and a dedicated team—including the De Mol brothers themselves—we’re equipped to handle even the toughest challenges. Where other companies see no way forward, we find solutions.

For lining and sectional repairs, we work with a range of liner and resin brands, selecting the most appropriate combination for each situation. Relying on a single brand can create complications, especially if it hasn’t been properly tested. That’s why all of our materials are DiBt-certified—guaranteed quality and performance.

For spray coating, we use Elastoflake: a highly flexible, top-grade, DiBt-certified resin with an exceptionally fast processing time of around 2 minutes. In most cases, that means we can finish the job within a single workday, and your pipes will be ready for use the same day.

Years of testing have shown that this resin bonds effectively to nearly all pipe materials and surfaces, and resists virtually all chemicals—making it a durable, long-term solution with a 50-year lifespan.

Always Open for Questions and Answers

Have questions or want to know more about our internal renovation solutions? We’re always happy to help. Reach out to us using the contact options below.

We’d love to hear from you.

De Mol IROTS

Katwijkerbroek 23
2223XN Katwijk ZH
Tel. 071 40 17 587
E. info@demolgroep.nl

Contact us