Basement Conversions
Transform your basement from a damp storage area into dry, usable living space. Professional tanking and waterproofing that lasts.
Unlock Your Basement's Potential
Your basement could be a home office, gym, playroom, extra bedroom, or entertainment space. The key is getting the waterproofing right from the start.
With 36 years of experience in damp proofing and tanking, we understand how water moves through basements. We'll design a waterproofing system that works for your specific situation — not a one-size-fits-all solution.
Whether you have a simple damp cellar or a full below-ground space, we can help you transform it into dry, comfortable living space.
Discuss Your Project
How We Keep Basements Dry
Different basements need different approaches. We assess your space and recommend the most appropriate system.
Tanking (Cementitious Waterproofing)
Waterproof renders and coatings applied directly to walls and floors. Creates a barrier that holds back water pressure. Best for basements with moderate water ingress.
Advantages:
- No loss of floor space
- Lower cost option
- Suitable for irregular surfaces
Cavity Drain Membrane System
Dimpled membrane fitted to walls and floor, directing any water ingress to a sump pump system. Manages water rather than trying to stop it. Best for high water table areas.
Advantages:
- Handles high water pressure
- Works with any wall condition
- Serviceable if problems occur
Often we use a combination of both systems depending on the conditions. We'll assess your basement and explain which approach makes sense for your situation.
What's Involved in a Basement Conversion
Waterproofing
The foundation of any basement conversion. We assess your specific conditions and install the appropriate tanking or cavity drain system to keep your new space permanently dry.
Sump & Pump Systems
For cavity drain systems or areas with high water tables, we install reliable sump pump systems with battery backup options to manage groundwater effectively.
Damp Proofing
If rising damp is present in the basement walls, we install a new damp-proof course as part of the conversion to prevent moisture wicking up from the ground.
Ventilation
Below-ground spaces need proper ventilation to prevent condensation. We design ventilation systems appropriate for your planned use of the space.
Insulation
Proper insulation keeps your basement comfortable and energy-efficient. We use appropriate insulation systems that work with the waterproofing.
Finishing Work
We can coordinate with trusted trades for electrics, plumbing, plastering, and finishing — or work alongside your own contractors.
How a Basement Conversion Works
Initial Consultation
We visit to assess your basement, discuss what you want to use it for, and identify any challenges. This is free and no-obligation.
Design & Quote
We design a waterproofing system for your specific conditions and provide a detailed written quote explaining what's included.
Preparation & Installation
We prepare the space, install the waterproofing system, and carry out any associated work like sump pumps and ventilation.
Handover & Guarantee
Once complete, we walk you through the system, explain any maintenance needed, and provide your written guarantee.
Basement Conversion FAQs
Do I need planning permission for a basement conversion?
Usually not, if you're converting existing space without changing the external appearance. However, if you're excavating to create new space or in a listed building or conservation area, you may need permission. We recommend checking with your local planning authority.
How much does a basement conversion cost?
It varies significantly depending on size, condition, and what waterproofing system is needed. A basic cellar tanking might start from a few thousand pounds; a full basement conversion with cavity drain system and finishing will be considerably more. We provide detailed quotes after our initial assessment.
How long does a basement conversion take?
The waterproofing element typically takes 1-2 weeks depending on size and system type. If you're including finishing work (electrics, plastering, flooring), allow additional time. We'll give you a realistic timeline for your specific project.
Will there be much disruption?
Basement work can be dusty and noisy, but it's contained to one area of the house. We protect your property and clean up as we go. Most customers stay in their homes throughout the work.
What about building regulations?
If you're creating habitable space, building regulations usually apply. This covers things like ceiling height, ventilation, fire escape, and electrical work. We can advise on what's likely to be required for your project.
Will a basement conversion add value to my home?
Generally yes — usable below-ground space is valuable, especially in areas where property prices are high relative to square footage. A well-done basement conversion typically adds more value than it costs.
Ready to Transform Your Basement?
Let's discuss your project. Craig will assess your basement, explain your options, and provide an honest assessment of what's involved.
- Free initial consultation
- Honest advice on what's feasible
- Guaranteed waterproofing
Discuss Your Project
Tell us about your basement and what you'd like to do with it.