About us
a family run business
Well-respected independent contractors
We’re a family run business, and we established Cannon Clarke Ltd in 1986. We’ve grown from a small set-up to a team of over 22 staff, which has completed around 26,000 jobs.
Our business is built on trust and respect and we continue to keep family values at the heart of the way we do things. With Cannon Clarke you’ll receive a highly experienced team of independent contractors, who pride themselves on delivering a top quality service to you.
Our Guarantees
All new work carried out by Cannon Clarke Ltd comes with a long-term guarantee.
Cannon Clarke Ltd promises our customers:
• Friendly and helpful first telephone contact
• Survey booking to fit your schedules and needs
• Timely survey report with specific, cost effective and detailed quotation
• Work booked in to fit in with your life & timelines
• Our helpful, well trained and experienced staff carry out high-quality work
• Supervision and support through Contracts Management team
• Builders clean finish after completion of work
Our experts
Experienced
With over 30 years’ experience, it’s unlikely that we meet a problem we haven’t fixed before. We’ll give you an accurate estimate of the work involved in your project and how much it will cost. However tricky your project is, we’ll complete it with precision and expertise.
Meticulous
We’ve built a durable business because we deliver a trustworthy service. That’s why we have so much repeat business and how we’ve retained our long-term clients. Our reputation for meticulous work sets us apart as the go-to experts in Bristol and the South West.
Qualified
You’re in safe hands with our Certificated Surveyors in Structural Waterproofing, which is the gold-standard qualification for the work we do. Cannon Clarke Ltd is:
- A long-standing member of the British Structural Waterproofing Association
- Approved waterproofing contractors with Vandex International (since 1988)
- Approved contractors for all Delta waterproofing systems (since 2003). Our Installer Registration number is 5079.
- Verified by BS:8102-2009 standards, so all our work meets quality criteria
- We’re validated by the key players in our industry.
Guaranteed quality
Every product we use in your project is carefully selected to give you the very best long-term performance. We review all the available installation systems regularly to make sure that you’re receiving the most up-to-date technology. That’s how we’ve developed our reputation for integrity and a conscientious service.
Meet The Team
Meet the Team
Welcome to the fortress of waterproofing and property preservation! Our team is a robust mix of seasoned experts and innovative thinkers, each bringing their unique skills to the table. From our moisture maestros who can seal a submarine, to our preservation pros who treat every property like a historic landmark, we’ve got all your needs covered. Together, we’re not just colleagues; we’re a family dedicated to safeguarding your investments and ensuring peace of mind. Get ready to be impressed!
Trusted Across Bath, Bristol & the South West
Cannon Clarke delivers domestic and commercial structural waterproofing across:
- Bath — heritage properties, basement conversions, retaining walls
- Bristol — modern developments, commercial units, residential refurbishments
- Somerset & Wiltshire — rural properties, cellars, below‑ground extensions
Trusted by:
- Surveyors
- Insurers
- Property managers
- Homeowners across the South West
Our reputation is built on technical accuracy, reliability and long‑term results.
Case Study Snapshots
Bath — Basement Conversion
Installed a full cavity drainage system with sump and pump, resolving long‑term damp issues and enabling a habitable living space.
Bristol — Commercial Unit
Applied cementitious waterproofing to retaining walls experiencing hydrostatic pressure, preventing water ingress during peak rainfall.
Somerset — Heritage Property
Designed a non‑intrusive waterproofing solution compatible with historic masonry and conservation requirements.
Compliance & Standards
Our waterproofing systems meet:
- BS 8102:2022 — Code of practice for protection of below‑ground structures where applicable
- Manufacturer installation standards
- Insurance‑backed guarantee requirements
All work is carried out by our employed trained specialists with extensive experience in below‑ground protection.
FAQs
What causes basement leaks?
Basement leaks are typically caused by hydrostatic pressure, poor drainage, failed membranes or structural cracks.
Do you follow BS 8102?
Yes. Where Applicable all waterproofing systems are designed and installed in accordance with BS 8102:2022.
Can waterproofing be added to existing basements?
Absolutely. We regularly retrofit waterproofing systems to older properties and heritage buildings.
How long does installation take?
Most projects take between 5–10 days depending on size and complexity. (larger projects will take longer.
Do you offer guarantees?
Yes. We provide manufacturer-backed and insurance-backed guarantees where applicable.
More information?
For reliable structural waterproofing, call Cannon Clarke or book a professional survey. We’ll assess your property, explain your options and provide a clear, compliant plan.
Our Process
Survey
We start by conducting a thorough survey of the space you want inspected. There's usually a fee for our initial consultation.
01
Scoping discussion
We collaborate with you to marry your objectives with our findings from the survey. We’ll discuss how you want to use the space when it’s finished and the best way of achieving your vision.
02
Design
Once we have the physical specifications, and your input on your requirements, we’ll design a system that works for you.
03
Approval
We’ll send you a specification, together with a report which explains the technical aspects. We’re happy to chat through this with you and make any changes you’ve identified.
04
Work begins
With an approved plan in place, we’ll get to work on the date we’ve agreed between us.
05