Installation of tanking or cavity drain membrane systems to waterproof existing cellars and basements. Includes sump pump installation and drainage channel fitting.
Typical cost
£5,000 — £10,000
Typical duration
1-2 weeks
Scope type
flexible
Typical tasks
Hack off existing plaster and expose masonry
Apply tanking slurry or fix cavity drain membrane
Install drainage channel at floor perimeter
Install sump pump and high-water alarm
Re-plaster or board walls over membrane
Extras & additional works
Based on a standard 50m² cellar, costs may increase if additional structural repairs are needed or if access is restricted.
Common questions Stainesai
The cost is influenced by the size of the cellar, the extent of existing damage, access difficulties, and the materials used.
Yes, cellar waterproofing must comply with Building Regulations to ensure structural integrity and proper drainage.
The process typically takes 1-2 weeks, including preparation, application, and drying time.
Common materials include tanking slurry, cavity drain membranes, drainage channels, and sump pumps.
Yes, due to the complexity and regulatory requirements, it's essential to hire a qualified professional. Always confirm with your tradesperson before work begins.
Ready to post a cellar waterproofing job?
Describe what you need. Stainesai structures it into a proper scope. Your first job post is free.