★★★★★96.1% customer satisfaction · 1,250+ jobs since 2005 · up to 30-year guarantee
20+
Years protecting NE homes
1,250+
Damp jobs quoted since 2005
96.1%
Customer satisfaction
30yr
Guarantee on qualifying work
Basement Damp explained
What is basement damp?
Basement damp occurs because below-ground walls and floors are in constant contact with wet ground, so without proper waterproofing, moisture and water push through. The professional solution is ‘tanking’ — either a cementitious waterproof coating or a cavity-drainage membrane system — designed to BS 8102 standards to keep the space permanently dry and usable.
Know the signs
Signs of basement damp to look for
Spotting it early keeps the repair small. These are the tell-tale signs in North East homes:
Wet or damp basement/cellar walls and floor
Standing water or pooling after rain
Strong musty, earthy smell and high humidity
White salt deposits and flaking on the walls
Mould, spoiled storage and unusable space
Common causes
Why basement damp happens
No waterproofing on below-ground walls and floor
Failed or old tanking that has broken down
High water table and groundwater pressure
Penetrating damp through cellar walls
Lack of drainage and ventilation underground
Our proven process
How we treat basement damp
Diagnosis first, then a lasting, guaranteed fix — never a sticking plaster.
Waterproofing survey
We assess water levels, wall condition and how you want to use the space, then specify the right BS 8102 system.
Cementitious tanking or membrane
Either a waterproof slurry bonded to the structure, or a cavity-drainage membrane that channels water to a sump and pump — chosen to suit your basement.
Drainage & ventilation
Where needed we add a sump, pump and ventilation so the space stays dry and healthy long term.
Finish & guarantee
We can leave it ready for plastering or full conversion, all backed by a written guarantee.
Get rid of basement damp for good
Book your free, no-obligation survey. We'll confirm the cause, give you a clear fixed price and back the work with up to a 30-year guarantee.
A 96.1% satisfaction rating isn't an accident — it's what happens when local specialists do the job properly, the first time.
★★★★★
“Dean was professional from start to finish and finished ahead of schedule — all backed by a 30-year guarantee. Couldn't recommend them more.”
ST
Sarah T.Newcastle upon Tyne · Verified customer
★★★★★
“Had tide marks creeping up the hallway for years. The survey explained exactly what was wrong and the price was fair. Bone dry now.”
MR
Mark R.Gateshead · Verified customer
★★★★★
“Black mould in the bedroom was making us ill. Honest advice, no scare tactics, sorted in two days. Brilliant local team.”
JP
Joanne P.Sunderland · Verified customer
Your questions, answered
Basement Damp FAQs
Can any basement be made dry?
In almost all cases, yes. Modern cavity-drainage membrane systems manage water rather than fight it, so even basements with a high water table can be made permanently dry and usable when designed and installed correctly to BS 8102.
What's the difference between tanking and a membrane system?
Tanking bonds a waterproof barrier directly to the walls and floor to hold water back, while a cavity-drainage membrane lets water in behind the membrane and channels it safely to a sump and pump. We recommend the best approach for your basement after the survey.
Can you convert my cellar into a room afterwards?
Yes — once waterproofed, we can help turn it into a dry, usable room. See our basement conversion service for the full fit-out.
Is basement waterproofing guaranteed?
Yes. Qualifying waterproofing work is backed by a written guarantee, and we use proven systems from established manufacturers.
This is a lead generation website. By submitting your details you are simply being passed to a reputable, independent tradesman.
Any work carried out is paid directly to them, not to North East Damp Proofing.
