Basement Tanking in Newcastle
Newcastle Barrier Damp Proofing surveys wet cellars and basements across Newcastle, Tyne & Wear, Northumberland and County Durham. If your below-ground space is damp, we find the actual cause before recommending anything.
The survey is free. You receive a written report with photos, whatever we find. If your cellar needs no treatment, you get a written all-clear and pay nothing.
If treatment is needed, you receive a fixed-price quote with no variation orders. Book a free survey and we aim to call you back the same day.
Real Photos From Our Recent Newcastle Jobs
Membrane fitted along the chimney breast base before the drainage channel is laid.
Corner junction sealed and reinforced before the drainage channel is set at floor level.
Waterproof render coat applied to cellar walls before back-plastering.
Full bay window projection lined with cavity-drain membrane during installation.
A survey that tells you what your basement actually needs
The damp industry has a well-documented problem. The firm that diagnoses a wet basement profits from fixing it. We say this before you have to think it.
Written report after every visit
We answer that conflict through what you leave with. Every visit ends with a written report and photos. If nothing needs treating, the report is your written all-clear.
A salesman never hands you a document saying you do not need to spend money.
Fixed-price quotation if treatment is needed
If treatment is needed, a fixed-price quotation follows. There are no variation orders.
Newcastle Barrier Damp Proofing covers Tyne & Wear, Northumberland and County Durham.
Get your free damp survey
A clear written report and honest advice, with no sales pressure.
What a wet basement costs if you leave it
An untreated wet basement is a financial problem that grows.
Structural damage from persistent moisture
Persistent moisture softens mortar joints, degrades render and begins to rot any timber embedded in the walls or floor.
A dehumidifier is not the answer
A dehumidifier keeps visible mould at bay. It does not address the water source.
Mortgage and resale impact
When a buyer’s surveyor flags a wet cellar, it can affect the mortgage valuation. A damp floor or a tide mark on the wall can grow into structural remediation costing £5,000 or more.
Two systems, one survey decision
Two systems waterproof below-ground spaces in Newcastle properties. The survey determines which suits your walls, your water pressure and your ground conditions. The choice is not based on which system carries the larger invoice.
Cementitious tanking
Cementitious tanking applies a waterproof render or slurry directly to the masonry. It physically seals the wall surface against water.
It works well when walls are structurally sound and water pressure is low. A rigid cementitious coat can be stressed by slight structural movement over time.
Cavity-drain membrane
Cavity-drain membrane is a studded plastic sheet bonded to the wall and floor surface. It does not stop water entering the masonry.
Instead, it channels water into a drainage channel at floor level. A sump pump removes it.
Cavity-drain systems tolerate building movement and are more forgiving when water levels vary between seasons.
For many Newcastle properties, cavity-drain membrane is the more practical recommendation. Older brick and solid-wall construction moves slightly with temperature changes. A rigid cementitious coat is more likely to crack under that movement.
Check cheaper causes first
Quote-shock is common in basement tanking. Wide variation between contractors reflects genuine differences in system specification, drainage design and water pressure rating.
Our survey looks for lower-cost causes before recommending a full system. Blocked external drains, a bridged damp-proof course and failed pointing can all cause a wet cellar.
If the water source is penetrating damp through the wall face, external remediation is usually the right answer.
Our damp proofing services cover those causes directly. Internal tanking treats the symptom, not the source.
Both systems require the removal of existing plaster and thorough wall preparation before installation begins.
Not sure what is causing your damp?
Book your free damp survey. We aim to call you back the same day.
What the work actually involves
1. Floor break-up
The floor perimeter is cut and broken to lay the drainage channel. Expect significant noise and dust.
2. Wall preparation
Existing plaster comes off the walls being tanked. Mortar joints are inspected and raked out where needed.
3. System installation
The chosen membrane or render is applied to the walls, floor junction and any structural features such as chimney breasts or bay window projections.
4. Drainage and pump
On cavity-drain installations, the drainage channel and sump are set at this stage. The pump is installed and tested.
5. Drying period
The space cannot be replastered until moisture levels fall to an acceptable level. A drying period of at least two weeks follows before replastering is possible.
6. Handover
Total time from start to a finished, decorated room is normally three to five weeks. We state realistic timelines at quotation stage, not after you have signed.
Basement Tanking FAQs
Get My Free Quote
Fill in the form below for a free quote: