
Basement Conversion
Bath
Installed a full cavity drainage system with sump and pump, resolving long-term damp issues and enabling a habitable living space.

Cannon-Clarke Ltd · Company 01992057 · Trading heritage since 1986
Active, accounts up to date·subcontractor & main contractor·Head office Avon
Cannon Clarke Ltd was established in 1986 and has grown into a respected independent contractor with over 30 years of experience in the waterproofing industry. As a family-run business, they pride themselves on delivering a top-quality service built on trust and respect, employing a team of over 22 staff who have completed approximately 26,000 jobs. They are known for being knowledgeable, thorough, and meticulous, with a reputation for providing durable and effective solutions.
Their expertise lies in structural waterproofing, damp proofing, timber preservation, and specialist replastering. They handle a range of issues including basement and cellar conversions, eradicating rising damp, rectifying wet or dry rot, and weatherproofing external walls. They also undertake work on laying foundations for swimming pools and gasproof membranes, as well as wall tie replacement.
The company emphasizes its commitment to using carefully selected, high-performance products and staying updated with the latest technologies to ensure long-term resilience and protection for properties. Cannon Clarke works with both domestic and commercial clients across Bath, Bristol, Somerset, and Wiltshire, including heritage properties, modern developments, and rural sites. They are trusted by surveyors, insurers, property managers, and homeowners.
Their surveyors are Certificated Surveyors in Structural Waterproofing (CSRT & CSSW) qualified, and the company is a long-standing member of the British Structural Waterproofing Association, an approved contractor for Vandex International, and approved for Delta waterproofing systems. They adhere to BS 8102:2022 standards and offer manufacturer-backed and insurance-backed guarantees on their work.

Bath
Installed a full cavity drainage system with sump and pump, resolving long-term damp issues and enabling a habitable living space.

Bristol
Applied cementitious waterproofing to retaining walls experiencing hydrostatic pressure, preventing water ingress during peak rainfall.

Somerset
Designed a non-intrusive waterproofing solution compatible with historic masonry and conservation requirements.
Surveyors, Insurers, Property managers, Homeowners.
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Cannon Clarke are waterproofing contractors, delivering high-quality basement and concrete protection solutions across Bath and Bristol. Their listed services include Waterproofing, Damp proofing, Restoration & heritage, Basement works and Refurbishment.
Cannon-Clarke Ltd is registered at 21 Brassmill Enterprise Centre, Bath, Avon, BA1 3JN, in South West.
Cannon-Clarke Ltd states that it works across Bath, Bristol, South West, Somerset and Wiltshire.
Accounts filed for the year to 2025 report 25 employees, which places the company in the 10-49 employees band.
Cannon-Clarke Ltd does not disclose turnover: UK small-company accounts are not required to. Based on headcount and trade debtors in its filed accounts, turnover is likely to fall between £1.5m and £3.9m. This is an estimate, not a filed figure.
Companies House lists Cannon-Clarke Ltd as active, with accounts most recently made up to 2025-04-30.
Cannon-Clarke Ltd displays Certificated Surveyors in Structural Waterproofing, British Structural Waterproofing Association, Vandex International, Delta waterproofing systems and BS 8102:2022 on its website.
Cannon-Clarke Ltd works in Residential, Commercial and Leisure.
Cannon-Clarke Ltd was incorporated on 1986-02-21.
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