Basement Waterproofing & Tanking Systems
Type A barrier tanking & Type C cavity drainage membrane systems with dual submersible sump pumps.
Why Professional Basement Tanking Is Essential
Properties across Berkshire, Surrey, and London face severe hydrostatic groundwater pressure, capillary moisture rise, and lateral rainwater penetration. Without a calibrated, continuous defence system, internal masonry quickly suffers from hygroscopic salt efflorescence, black mould spores, blown plaster, and rotting timber joists. Above Water install permanent barrier systems across walls and floors to arrest moisture ingress at the exact physical source.
Our Engineered Systems in Action
The lasting success of damp proofing treatments relies on British Standards (BS 8102 & BS 6576), quantitative moisture profiling, and careful surface preparation. We inspect substrate salinity and relative humidity before applying waterproof tanking slurries, high-density studded cavity drain membranes, or silane cream DPC injections.
Key Advantages of Our Basement Tanking Systems
Choosing Above Water provides property owners with:
- British Standard BS 8102:2022 compliant waterproofing design
- Type A Barrier Tanking (waterproof cementitious slurry & multi-coat renders)
- Type C Cavity Drain Membrane with perimeter drainage channels (AquaChannel)
- Dual submersible sump pump stations with battery backup inverter protection
- Transforms wet, damp cellars into warm, dry, habitable living and storage space
50+ Years Combined Trade Experience
Led by senior surveyor Eddie, Above Water are certified remedial contractors with over 50 years of combined trade mastery across Windsor, Reading, Bracknell, Wokingham, Guildford, and Surrey. From structural waterproofing and cavity drain installations to rising damp treatments and dry rot repairs, we deliver honest diagnostic advice and non-invasive electronic moisture testing.
Diagnostic Signs & Substrate Causes
Recognising the early symptoms of moisture ingress prevents structural deterioration and costly repairs.
Warning Signs & Common Symptoms
Underlying Structural Causes
Our 4-Step Diagnostic & Treatment Process
Every property receives a measured, professional approach compliant with British Standards.
Structural Ground Audit
Evaluating soil type, water table vulnerability, basement depth, and wall construction.
Waterproofing Scheme Design
Selecting between Type A barrier tanking or Type C cavity drainage with sump pump management.
Membrane & Channel Installation
Fixing 8mm/20mm studded membranes, floor perimeter perimeter conduit, and sealed inspection ports.
Dual Pump & Alarm Commissioning
Installing twin automatic submersible pumps with high-water level alarm and secondary battery inverter.
Treatment Specifications
High-specification damp proofing membranes, chemical barriers, and waterproofing systems.
Type C Cavity Drainage System
The gold standard in modern basement waterproofing. Depressurises incoming water and silently directs it to a sump pump station.
Twin Sump Pump & Battery Backup Stations
Heavy-duty dual vortex pumps ensuring continuous operation even during municipal power cuts or torrential storms.
Type A Cementitious Tanking Slurry
Multi-coat polymer-modified waterproof barriers directly bonded to solid masonry substrates.
Frequently Asked Questions About Basement Tanking
Local Areas We Cover For Basement Tanking
We carry out damp surveys across:
Speak Directly With Eddie
Free honest advice on basement tanking, electronic diagnostic surveys, and no-obligation quotations across Berkshire & Surrey.
Above Water Damp Proofing