Structural Damp & Waterproofingfor Landlords & Rental Properties

Tanking, cavity drainage, and structural waterproofing

Quick answer

Structural damp and waterproofing covers specialist water ingress treatments for below-ground structures, basements, and properties with significant water management challenges. Methods include cavity drainage systems, tanking (internal and external), Type A/B/C waterproofing, and structural repairs to retaining walls and foundations. This is highly specialist work requiring surveyors with structural waterproofing qualifications.

Why Do Landlords Need Structural Damp & Waterproofing?

Direct answer

Below-ground and structural damp issues are among the most complex and expensive property defects. Incorrectly treated, they can cause progressive structural damage and create persistently uninhabitab…

Below-ground and structural damp issues are among the most complex and expensive property defects. Incorrectly treated, they can cause progressive structural damage and create persistently uninhabitable spaces. For landlords with basement flats or below-ground rooms in their rental portfolio, structural waterproofing is a long-term investment in property integrity.

What Should You Expect?

Structural waterproofing works are always preceded by a detailed survey and specification. Works may include installation of cavity drainage membranes, sump pumps, and drainage channels (Type C — 'drained protection'), application of waterproof renders and coatings (Type A — 'barrier protection'), or structural waterproof concrete (Type B). Works are typically guaranteed for 10–25 years.

Find a Structural Damp & Waterproofing Specialist Near You

All 9 listed specialists below are manually verified. Promoted listings appear first.

Promoted

Quoins Damp Surveyors

Bishop's Stortford, london · CM23 3JG

✓ Insured
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AntiDamp

Wigan, greater-manchester · Wn6 0ay

AntiDamp are Damp & Mould correction specialists based in Wigan, covering the north west. We specialise in fixing damp and mould issues at source, we fix the issue as opposed to just treating it. Our goal is to make sure you never see us on the same job twice. We already work with a number of estate agents across Wigan and the north west, as well as social housing companies and councils. This means our work is regularly scrutinised by local authorities.

✓ Insured✓ Awaab's Law
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Alpine Property Surveys Ltd

East Morden, london · BH20 7DR

✓ CSRT✓ Insured✓ Awaab's Law
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KC Home Solutions ltd

Crawley Down, Crawley, london · RH10 4AL

Established in 2023, our family-run property maintenance business brings over 20 years of industry experience to every job. We provide comprehensive property maintenance across London, Surrey, Kent, and Sussex. Fully insured with SafeContractor accreditation, we specialise in expert damp and mould treatments. Our four-step mould treatment process is highly effective because it targets mould at the source. We use biocidal products, which are specially formulated to kill mould spores completely and prevent regrowth, far more effective than home remedies like apple cider vinegar or shop bought products containing bleach, which may clean the surface but cannot penetrate deeply or stop mould from returning. We do more than treat visible mould. Our team is trained to identify and address the underlying cause, helping to prevent the issue from returning. As part of this process, we assess the property both internally and externally to determine whether remedial work is required. This may include: Improving ventilation systems ​Addressing penetrating damp Resolving DPC issues

✓ Insured✓ Awaab's Law
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Mothline presentation ltd

Southampton , south-west · So16 4px

Southampton's Most Trusted Damp & Preservation Specialists No guesswork. No upselling. Just honest, survey-led damp solutions backed by a 10-year guarantee.

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Sovereign Preservation

Plymouth, south-west · PL3 5PS

We are a family run business covering Devon And Cornwall. Specialising. Damp treatment , plastering internal and external, woodworm treatment , Dry rot specialists, did you get your poop condensation control. All work covered by a 10 year Guarantee.

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Anticc roofing and building Ltd

Chatham , kent · Me4 5eu

We are members of the Federation of master builders members of TrustATrader members of Checkatrade Google guaranteed members of the Confederation Roofing Contractors we operate all over the Kent area and we are Medway based we offer a wide range of Damp Proofing Products DPC dam courses mould control and many other things

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Hepple Property Care Ltd

Houghton le Spring, north-east · DH4 5RJ

We are a multi-award-winning PCA-accredited contractor and have been established since 2008, serving landlords and homeowners across the North East of England. We are specialists in all damp, mould and timber infestation and have treated tens of thousands of properties in that time successfully. Our surveyors are CSRT qualified, and we have all qualified work staff.

✓ PCA✓ CSRT✓ Insured✓ Awaab's Law
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The Mould Company

Brighouse, yorkshire · HD6 1NA

At The Mould Company, we are committed to delivering a highly efficient, end-to-end service you can rely on. Every client is supported by a dedicated customer service team assigned to their specific area or council, ensuring clear communication and regular updates throughout the entire process. With years of experience in property maintenance and specialist cleaning, we understand the importance of a thorough property inspection. That’s why we’ve developed our own in-house inspection reports, which can be tailored to meet your specific needs and requirements. Our innovative mould treatment methods are designed not only to eliminate mould effectively but also to protect your property from future issues—offering long-term peace of mind and healthier living environments.

✓ Insured✓ Awaab's Law
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Frequently Asked Questions About Structural Damp & Waterproofing

What is the difference between Type A, B, and C waterproofing?
Type A (barrier protection) uses membranes and renders to keep water out. Type B (structurally integral protection) uses waterproof concrete. Type C (drained protection) accepts water ingress and manages it through cavity drainage and sump pumps. BS 8102:2022 covers below-ground waterproofing design — your contractor should specify which type is appropriate and why.
Does structural waterproofing require planning permission?
Internal waterproofing works to existing structures typically do not require planning permission. External waterproofing, basement excavation, and works affecting listed buildings or buildings in conservation areas may require consent. Always check with your local planning authority before undertaking significant structural works.
How long does structural waterproofing last?
Well-designed and properly installed structural waterproofing should last the life of the structure. Cavity drainage systems with quality sump pumps are designed for 25+ years. Membrane and tanking systems backed by specialist contractor guarantees typically cover 10–25 years.