Liquid Membrane New Roof
Complete liquid applied waterproofing for flat roofs.
Learn More
Liquid-Applied Waterproofing — Flexible Protection for London's Complex Roofs
Liquid membrane systems form seamless, fully-adhered waterproof skins on any substrate. Ideal for detailing around rooflights, complex junctions, and as a complete waterproofing solution for flat roofs across Greater London
- Cold-applied systems — no torch or hot works required
- Seamless membrane eliminates joints and potential failure points
- BBA-certified systems with 20+ year performance records
Roof Repair London
4.9 Star Rating
20+ Years Experience
Free Roof Inspection
Fill in your details - we'll get back to you within 1 hour.
0
Roof Repairs Completed
0
Happy Customers
0
Years Experience
0
Hour Response Time
Waterproofing Projects Across Greater London
Completed liquid membrane and coating work on London properties.
Roof Repair – Bermondsey, SE1
Flat Roof Replacement – Croydon, CR0
Slate Roof Restoration – Greenwich, SE10
Commercial Re-Roof – Canary Wharf, E14
Gutter Installation – Chelsea, SW3
Chimney Repointing – Islington, N1
Tile Replacement – Wembley, HA9
Emergency Leak Repair – Hackney, E8
Roof Insulation – Richmond, TW9
Velux Window Install – Hampstead, NW3
Lead Flashing – Westminster, SW1
Storm Damage – Battersea, SW11
Flat Roof Coating – Brixton, SW2
Fascia & Soffits – Fulham, SW6
Roof Survey – Kensington, W8
Moss Removal – Wimbledon, SW19
GRP Fibreglass Roof – Peckham, SE15
EPDM Rubber Roof – Stratford, E15
Zinc Roofing – Shoreditch, EC2
Roof Waterproofing – Clapham, SW4
Why London Property Owners Choose Liquid Waterproofing
Versatility, durability, and seamless protection.
20+ Years Experience
Trusted roofing expertise across London since 2004.
Fully Insured Company
Complete insurance coverage for your peace of mind.
Fast Response
Rapid response times across all London boroughs.
100% Satisfaction
We guarantee quality workmanship on every project.
Quality Materials
Only premium, industry-leading roofing materials used.
Complete Roof Waterproofing Services for London
Liquid membrane, mastic asphalt, and protective coatings.
Roof Detail Waterproofing
Upstands, penetrations, and complex junctions sealed.
Learn MoreMastic Asphalt
Traditional hot-applied mastic for heritage applications.
Learn MoreCold Liquid Systems
Water-based acrylic and polyurethane coatings.
Learn MoreCrack Injection
Structural crack sealing for concrete and masonry.
Learn MoreWaterproofing Overlay
Liquid membrane applied over existing sound substrate.
Learn MoreConsidering Liquid Waterproofing for Your London Roof? Free Survey
Our Waterproofing Process
Systematic preparation, professional application, lasting results.
Book Free Inspection
Schedule your free roof inspection online or by phone.
Roof Assessment by Experts
Our certified roofers thoroughly inspect your roof.
Transparent Quote & Repair
Receive a detailed, no-obligation quote and we get to work.
Roof Waterproofing London - All Areas Covered
Waterproofing services across all London boroughs.
Camden
Hackney
Islington
Westminster
Southwark
Lambeth
We serve all London boroughs within 24 hours.
Our Google Reviews
Google
James Wilson
Croydon, South London
"KS Roof Master did an outstanding job repairing our roof after storm damage. Fast response, fair pricing, and excellent workmanship."
Sarah Thompson
Islington, North London
"We had a leaking flat roof that other companies couldn't fix. KS Roof Master diagnosed the issue quickly and the repair has been perfect."
David Patel
Greenwich, East London
"Professional from start to finish. The free inspection was thorough and the quote was transparent with no hidden costs."
Roof Leak or Waterproofing Failure? Contact Us for Assessment
Emergency waterproofing and temporary protection available.
Active water ingress
Failed membrane
Cracked coating
Detail failure
Roof Waterproofing Costs in London
Transparent pricing for liquid membrane specifications.
| Service | Starting Price |
|---|---|
| Waterproofing Survey & Specification | FREE |
| Liquid Membrane (per m²) | £55-£75 |
| Detail Waterproofing (per m²) | £65-£85 |
| Mastic Asphalt (per m²) | £85-£110 |
| Crack Injection (per m) | £45 |
| Protective Topcoat (per m²) | £25 |
* Complex detailing and difficult access may affect final costs. Substrate condition determines preparation requirements.
Book Your Free Waterproofing Survey
We assess your roof and recommend the most suitable waterproofing solution.
- Full roof condition report
- Photo documentation of all findings
- Expert repair recommendations
- Transparent cost estimate
Claim Your Free Report
Roof Waterproofing Questions Answered
Technical guidance on liquid membrane systems.
Liquid membranes offer: complete flexibility — they conform to any shape without seams; cold application — no fire risk on occupied sites; seamless termination — liquid into all upstands and penetrations; crack-bridging — flexible enough to accommodate structural movement without cracking. For London's complex roof geometries, liquid systems often outperform sheet membranes.
Yes — liquid systems work equally well for new construction and remedial work. For new roofs, they provide a cost-effective alternative to EPDM or GRP. For repairs, they can be applied over existing sound substrates, sealing cracks and joints without stripping. The versatility makes them our first recommendation for many London situations.
Modern liquid membranes — particularly polyurethane and PMMA systems — are formulated for UK conditions. They tolerate temperature extremes (-30°C to +90°C), resist UV degradation, and maintain flexibility across seasonal temperature cycles. Application must follow manufacturer guidelines for temperature and humidity to ensure proper cure.
Surface preparation is critical: substrate must be clean, dry, and free from contamination. Concrete should cure 21+ days. Existing coatings must be abraded. Cracks and voids filled. We install a primer appropriate to the substrate — this ensures adhesion and correct cure. Preparation typically represents 50% of the work on remedial projects.
Yes — one of liquid systems' key advantages over sheet membranes is their ability to waterproof vertical upstands, parapets, and retaining walls. PMMA systems in particular can be applied vertically without sagging. We detail terminations to ensure water cannot track behind the membrane at edges.
Annual inspection of edges and terminations. Periodic cleaning of debris accumulation. Topcoat renewal every 10-15 years to refresh UV protection. Small repairs to any damaged areas immediately upon identification. We offer maintenance contracts including these checks and minor repairs.
Seamless Protection for Complex Roofs — Book a Free London Survey
Liquid systems that perform reliably for decades.