Specialist in Waterproofing & Damp Proofing

Call Us Today on 0208 594 3777

Renderseal Ltd is a Specialist Waterproofing Contractor, recognised and approved by all the leading waterproof material manufactures and leading contractors.

The Company is a Registered Waterproofing Contractor for Sika Ltd, meaning we can provide Sika warranties as well as being an approved installer for John Newton Waterproofing, Delta Membrane Systems, RIW Ltd and Safeguard Europe Ltd, thus able to design and specify waterproofing schemes to suit all requirements in any given situation, utilizing all the different waterproofing methods.

Why choose a waterproofing specialist

Section 4.2 of BS 8102:2022 lays out some guidelines for anyone hiring a basement waterproofing contractor. The Guideline recommend that a waterproofing specialist should be included as part of any underground structural waterproofing design plans and they should meet the following criteria:

  • Be suitably experienced in dealing with the type and size of the project
  • Be capable of devising solutions that accommodate the projects needs and constraints
  • Provide information and guidance on the design, installation and future maintenance of the project

With more than 25 years of waterproofing experience, Renderseal Ltd fulfills all of these criteria and understand all the problems that may arise throughout the basement works.

Our surveyor is CSSW qualified and among the most knowledgeable and skilled in the industry.

Basement Waterproofing

Sika 1 Pre bagged Render System


Cavity Drain Membrane

Cavity Drain Membrane system installed



Check out or gallery and case studies

Please complete the form below and a member of the team will be in touch