Business Details
27 Years
experience
Trusted Waterproofing & Damp Proofing Services in London
Renderseal has been a trusted name in waterproofing and damp proofing for over 25 years. Established in 1999, we specialise in delivering high-quality solutions for both commercial and residential clients across London and the British Isles. Our team includes CSSW-qualified surveyors and fully trained professionals with extensive expertise in cementitious waterproofing, cavity drain membranes, and structural waterproofing systems. As approved installers for industry-leading manufacturers like Sika Ltd, Delta Membrane Systems, and Safeguard Europe Ltd, we design tailored solutions to meet diverse project requirements.All our work is fully guaranteed, with optional insurance-backed warranties available. With a focus on technical excellence and customer satisfaction, we provide comprehensive surveys, design consultations, and maintenance guidance to ensure long-term protection against water ingress. Our commitment to quality has earned us recognition from architects, developers, and contractors nationwide.
Services
Basement Waterproofing
Damp Proofing
Cavity Drain Membrane
Cementitious Coatings
Chemical Damp Course Injection
Details
- Year established: 1999
Highlights and features
- We have over 25 years of specialist experience in structural waterproofing.
- Our surveyors are CSSW-qualified and among the most skilled in the industry.
- We are approved installers for leading manufacturers like Sika and Delta Membrane Systems.
- All work comes with a full guarantee and optional insurance-backed warranty.
- We serve commercial, residential, and heritage projects across the UK.
Associations and certifications
- Sika Ltd
- John Newton Waterproofing
- Delta Membrane Systems
- RIW Ltd
- Safeguard Europe Ltd
Services
Basement Waterproofing
We provide comprehensive basement waterproofing solutions tailored to new builds and existing structures. Using methods like cementitious coatings and cavity drain membranes, we ensure dry environments for commercial and residential properties. Our systems comply with BS 8102:2022 standards and include guarantees for long-term protection against water ingress.
Damp Proofing
Our damp proofing services address rising damp and moisture ingress in historic and modern buildings. We install chemical damp courses and salt-retardant renders to protect walls from hygroscopic salts. Solutions are designed to meet property-specific needs while preserving structural integrity and aesthetics.
Cavity Drain Membrane
Cavity drain membranes manage water penetration by directing moisture to drainage points or pumps. This method requires minimal substrate preparation and allows immediate decoration. Ideal for poorly maintained basements, it prevents pressure buildup while maintaining breathable internal environments.
Cementitious Coatings
Cementitious coatings create physical barriers against water pressure in basements. Applied after substrate preparation, these multi-coat systems include epoxy-bonded Hypalon strips for joint sealing. They are suitable for new constructions and structures requiring high water-resistance levels.
Chemical Damp Course Injection
We install injected damp-proof courses to replace failed physical DPCs. Chemicals diffuse into mortar to block rising moisture. Post-treatment involves replastering with specialist renders to eliminate salt contamination and restore wall integrity.
Questions
What waterproofing services do you offer?
We provide basement waterproofing, cavity drain membranes, cementitious coatings, and chemical damp course injections for residential and commercial properties.
Why choose Renderseal for damp proofing?
With 25+ years of experience and accreditations from Sika and Delta Membrane Systems, we offer guaranteed solutions tailored to structural needs.
Do you work outside London?
Yes, we cover the M25, Home Counties, and all areas of the British Isles for waterproofing projects.
Are your waterproofing systems guaranteed?
All work includes a full guarantee, with optional insurance-backed warranties available for added peace of mind.
How do you handle historic buildings?
We use sympathetic methods to preserve heritage structures while installing modern damp proofing and waterproofing systems.
