structural waterproofing
protect your property with structual waterproofing
Structural Waterproofing Services in Bath, Bristol & the South West
Structural waterproofing is essential for protecting below‑ground structures from water ingress, damp, and long‑term deterioration. Cannon Clarke provides specialist waterproofing solutions designed to meet BS 8102:2022, ensuring your basement, cellar, retaining wall or below‑ground extension remains dry, safe and structurally sound.
What Structural Waterproofing Protects Against
Below‑ground structures are exposed to constant moisture and hydrostatic pressure.
Without proper protection, this leads to:
- Persistent damp patches
- Mould growth and poor air quality
- Structural weakening over time
- Damage to finishes, flooring and stored items
- Increased long‑term repair costs
- Water ingress during heavy rainfall
Our Waterproofing Process
We follow a clear, compliant and proven methodology:
- Detailed Assessment & Diagnosis
A thorough inspection of the structure, moisture pathways, drainage conditions and existing defects.
- System Design
A tailored waterproofing strategy based on construction type, usage, risk level and BS 8102 requirements.
- Professional Installation
High‑performance membranes, drainage systems or cementitious coatings installed by trained specialists.
- Quality Assurance
Every installation is checked against BS 8102 and manufacturer specifications to ensure long‑term performance.
- Aftercare & Support
Clear guidance on maintenance, ventilation and ongoing protection.
Waterproofing Systems We Install
Cavity Drainage Membrane Systems (Type C)
A reliable, maintainable system that manages water ingress and directs it safely to drainage or a sump pump.
Cementitious Waterproofing (Type A)
Applied directly to the structure to resist moisture penetration and hydrostatic pressure.
Combined Systems
For high‑risk environments, we design and install combined Type A + Type C systems for maximum protection.
Pricing Guidance
Structural waterproofing costs vary depending on:
- Size of the area
- Type of waterproofing system
- Access and complexity
- Condition of existing surfaces
- Required compliance level
Typical ranges:
- Small basements: £10,000-£15,000
- Medium spaces: £10,000 – £20,000
- Full conversions: £15,000 +
We provide clear, itemised quotations with no hidden costs.
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