Sovereign approved

Sovereign LogoHere at Troughtons Builders we are Sovereign approved contractors. This means that we are able to carry out damp proofing, tanking, and timber treatment work with insurance backed guarantees to give you extra peace of mind.

We can provide damp proofing works, chemical injection, tanking systems, timber preservation, wet and dry rot removal, and structural assessments; and all to the highest Sovereign approved standards.

As a Sovereign approved contractor we use a range of the highest quality damp proofing products for installing a damp proof course in masonry walls. We also offer a surface applied damp proof membrane for floors, and we make good use of Sovereign’s most popular damp proofing product, Injection Cream, which is a new development in damp proofing that is much easier to install than traditional techniques.

All of the Sovereign damp proofing products for masonry that we use in our work are independently tested and approved by the BBA (British Board of Agrément).

If you are purchasing a house we can also provide a damp proof report to ensure you are fully in the picture and there are no post-purchase surprises.

Please also see our pages on Sovereign approved damp proofing and Sovereign approved tanking systems.


  • Low House, residential conversion

    A project to convert two historic cottages into one luxury residence, while maintaining their character and charm, was always going to be a challenge. The addition of a sun room with panoramic views and a large detached garage added to the project’s complexity. However the end result is a home with 21st century luxury, coupled with all the features of a Lakeland Cottage. Well done T.H.I Ltd!
    Roddy Gale, owner Low House