★★★★★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
Floor Damp explained
What is floor damp?
Floor damp happens when ground moisture rises through a solid floor that has a failed, bridged or missing damp-proof membrane (DPM), or where a suspended timber floor is poorly ventilated. Signs include cold damp patches, lifting floor coverings and a musty smell. The fix is to install a new surface DPM or breathable system, or improve sub-floor ventilation for timber floors.
Know the signs
Signs of floor damp to look for
Spotting it early keeps the repair small. These are the tell-tale signs in North East homes:
Cold, damp patches on a concrete or screed floor
Lifting, bubbling or loose floor tiles and vinyl
Musty smell and damp carpets or underlay
Damp tide marks at the base of walls meeting the floor
Black mould or moisture under furniture and rugs
Common causes
Why floor damp happens
Failed or missing damp-proof membrane in a solid floor
DPM not linked to the wall damp-proof course (bridging)
Poorly ventilated suspended timber floor voids
Rising groundwater under the slab
Spills or leaks soaking into screed and subfloor
Our proven process
How we treat floor damp
Diagnosis first, then a lasting, guaranteed fix — never a sticking plaster.
Survey the floor
We confirm whether it's a DPM failure, bridging or ventilation issue, and check how it links to the wall DPC.
Install a new membrane
A surface-applied liquid or sheet DPM is installed and linked to the wall damp-proofing to stop moisture coming through.
Sort timber floor ventilation
For suspended floors we clear and add airbricks/sub-floor vents to keep timbers dry.
Reinstate & guarantee
The floor is finished ready for your new covering, with qualifying work guaranteed.
Get rid of floor 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
Floor Damp FAQs
Why is my concrete floor damp?
Usually the damp-proof membrane has failed, was never fitted, or isn't joined to the wall's damp-proof course, letting ground moisture rise through the slab. A surface DPM linked to the wall treatment solves it.
Can you damp proof a floor without digging it up?
In most cases, yes. A surface-applied liquid damp-proof membrane can be installed over the existing slab and tied into the walls, avoiding the cost and disruption of excavating the floor.
My wooden floor feels damp and springy — why?
Suspended timber floors need good cross-ventilation underneath. Blocked airbricks trap moisture and can lead to wet or dry rot. We restore ventilation and treat any affected timber.
Is floor damp proofing guaranteed?
Yes — qualifying floor damp-proofing work is covered by a written guarantee.
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.
