Professional Basement Waterproofing & Damp Proofing Experts
At SM Preservations, we provide expert basement tanking and cellar waterproofing services throughout Bromley and the surrounding areas. Whether you’re converting a basement into a living space or protecting an existing structure from damp, we offer reliable, long-lasting solutions to keep your property dry and protected.
What Is Basement Tanking?
Basement tanking is a specialist process used to waterproof below-ground spaces such as basements, cellars, and foundations. It involves applying a watertight barrier to the walls and floors to prevent water ingress from the surrounding ground.
By sealing the basement from moisture and groundwater, tanking protects against damp patches, mould, musty smells, and structural damage, allowing you to use the space safely and comfortably.
Why Choose SM Preservations
Accreditations & Insurance
Proud member of Checkatrade. Fully insured and compliant with UK building preservation standards.
Types of Basement Tanking Systems
Cementitious Tanking
A waterproof slurry applied directly to walls and floors
Creates a solid barrier against water penetration
Ideal for basements with moderate damp problems
Cavity Drain Membrane Systems
Uses a studded membrane to channel water into a drainage system
Prevents pressure build-up on walls
Excellent for basements prone to continuous water ingress
Can be used alongside sump pumps for maximum protection
Bitumen or Liquid Membrane Tanking
Flexible coatings applied to the substrate for extra waterproofing
Suitable for certain concrete or brick surfaces
Our Step-by-Step Basement Tanking Process
Site Survey & Assessment
We start with a detailed inspection to determine the cause of moisture or water ingress and the best tanking system for your property.
Preparation
Surfaces are cleaned, repaired, and prepared to ensure the waterproofing materials adhere correctly.
Application of Tanking System
Our trained technicians apply the chosen waterproofing system—whether it’s cementitious, membrane-based, or a combination—ensuring full coverage of walls and floors.
Drainage & Ventilation
If required, we install drainage channels, sump pumps, or ventilation systems to manage water effectively.
Final Inspection & Guarantee
After completion, we perform a quality check to ensure a watertight seal and provide an aftercare guide. All work comes with a full guarantee for peace of mind.
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Get a Free Damp Survey
Don’t let damp damage your home. Book a no-obligation survey today to identify the cause and get a fixed-price solution.
FAQ's
What’s the difference between tanking and damp proofing?
Tanking is designed for below-ground areas where water pressure is higher and moisture comes through the structure itself. Damp proofing, on the other hand, is for above-ground walls affected by rising damp or condensation. If your basement is below ground level, tanking is the correct approach.
How long does basement tanking last?
When installed professionally and maintained properly, basement tanking systems can last 20–30 years or more. At SM Preservations, we use only proven materials and provide guarantees for all waterproofing work.
Can I convert my basement after tanking?
Yes! Once tanking is complete and the area is fully dry, you can safely convert your basement into a living area, office, gym, or storage space. We can also recommend finishing materials that complement your new dry environment.