Protecting Structures.
Preserving Futures.
Specialist waterproofing solutions for residential, commercial, and structural projects across the UK.
End-to-end waterproofing, engineered to last.
Ten core disciplines covered by certified specialists — from substructure tanking to trafficable roof systems.
Basement Waterproofing
Type A, B & C systems for habitable below-ground spaces.
Structural Waterproofing
Engineered protection for foundations and substructures.
Damp Proofing
Rising damp, penetrating damp and condensation control.
Roof & Balcony Systems
Liquid-applied membranes and trafficable decks.
Gas Membranes
Radon, methane and CO₂ ground gas protection.
Car Parks
Deck coatings for multi-storey and basement car parks.
Waterproofing Design
CSSW-led design to BS 8102 and NHBC standards.
External Membranes
Pre-applied and post-applied tanking systems.
Pumping Systems
Sump, drainage and twin-pump cavity systems.
Construction Joints
Hydrophilic strips, waterbars and joint sealing.
Built to British Standards. Built to last.
ISA Waterproofing delivers industry-leading waterproofing systems designed for long-term structural protection. Our team works with developers, contractors, architects, and homeowners to provide reliable waterproofing solutions built to British Standards.
Selected works across the UK.
Basements, balconies, car parks, roofs and structural concrete — a glimpse at recent installations.
Precision. Certification. Longevity.
Certified Experts
Guaranteed Systems
High-End Materials
Precision Installation
UK Standards Compliance
Technical Design Support
Six steps from survey to certification.
Consultation
Understand the brief, structure and risk profile.
Site Survey
Detailed assessment of substrate and conditions.
Waterproofing Design
BS 8102 compliant specification and drawings.
Installation
Certified operatives, premium membranes.
Quality Assurance
Inspection, testing and sign-off at every stage.
Certification & Guarantee
Insurance-backed warranty on completion.
Need a Waterproofing Specialist?
Speak to our technical team. We respond within one working day with a free site assessment plan.
Book Your Survey