Build safe and for the future!

Environmentally friendly solution!

Our vision

When a better solution comes - use it!

Safe and innovative.

Waterproof tunnels,

excellent for most concrete constructions!

Our products

The RockDrain System (TRS-Methode)

Drains, water, fire and frost -proofing tunnels and underground constructions in the most cost-effective and sustainable way.

The RockDrain System (TRS-Methode) – one of our main products.

Our line of environmental friendly and innovative waterproof concrete products bring advantages into all concrete construction in general.

Our concrete experts use modern technology to improved the success they had in eg. Petra Jordan for about 2.200 years ago with waterproof concrete. 

“They created underground cisterns that were lined with waterproof concrete, to prevent the water from seeping into the earth. The cisterns were very well-constructed, and several of them are still in use to this day.”

Clip from;

When an even better solutions comes along – use it!

Advantages, savings!

  • Lower Cost (L 55%
  • Increased lifespan 89%
  • Better eutrophication 55%
  • Less timeconsuming 62%

Finished drained, fire, water and frost -proof tunnels and underground constructions in only 8 cm. 

+ 120 years lifespan.

Also for rehabilitations.

It´s hard to find any reason NOT to use this system!

The numbers does not lie

RockDrain; drain, water, fire and frost -proofing system is an economical innovative system for tunnels and underground constructions.

Full-scale tested over the last 8 years.

Compared with Scandinavian conventional frost and waterproofing method often called NMT. The RockDrain System excels in all aspect!

Easy installation.

Paula works for one of Swedens largest construction companies.  Installing drainnet.

Article in;

Tunnelling Journal February 2017


Lower cost - LCC


Photochemical ozone (POCP)


Energy consumption




Global warming