Sovereign - tanking

Sovereign approved tanking systems

Tanking systems are ideal for cellar and basement conversions. They provide vital extra living space in residential situations, and can help you access previously untapped floor space in commercial premises. The work comes at a relatively low cost and adds value to your property, so it is well worth considering.

We are experienced in water proofing and tanking for cellars and basements as well as for wet rooms. We’ve worked on commercial and residential water proofing and tanking projects with great results, and all of our work is backed by a Sovereign guarantee so you know you are in safe hands.

If you are thinking of a wet room, we have a team of skilled tradesmen with the joinery, tiling and plumbing skills required, and our approval from Sovereign means we access the very best systems so you don’t need to be concerned about potential leaks and drainage problems.

And if you’re considering a cellar or basement conversion we can advise you on the right water proofing, damp coursing or tanking system to meet your needs. We’ll bring in a skilled team for every aspect of the project right through to an expert finish).

We have extensive experience in creating stunning bathrooms and kitchens for extended living spaces; please see our project pages for further information.

Please also see our site management page for further details on our comprehensive service for building, renovation, extension or conversion work.



  • Eller How

    Renovating the kitchen area in our traditional Lakeland stone home was not straightforward to design..... Dual aspect low casement windows and limited wall space didn't exactly help to begin with. THI Ltd. worked patiently and professionally with me to create the desired result using the skills of their small team of quality craftsmen who approached all aspects of the project with reliable efficiency and consideration. Thank You!
    Mrs J Longden