Damp Proofing Services in North London
Rising damp, penetrating damp, failed DPCs and the surveys that tell them apart — complete damp proofing for North London's period housing stock.
What does damp proofing involve? Damp proofing covers the diagnosis and treatment of moisture entering a building's fabric: rising damp from the ground where a damp proof course has failed or is bridged, penetrating damp through defective external fabric, and the surveys that distinguish these from condensation before money is spent. In North London — where most of the housing stock is solid-wall Victorian and Edwardian construction on London Clay — treatment typically means chemical DPC injection to BS 6576 with salt-retardant replastering (£70–£120 per metre), targeted fabric repairs, or often just removing whatever is bridging an intact DPC. Diagnosis first, always: a £280–£450 survey routinely prevents a £3,000 wrong treatment.
Our damp proofing services
Rising Damp
Tide marks, peeling paint and salty deposits on ground-floor walls? We arrange proper BS 6576 diagnosis and treatment for rising damp across North London's period housing stock.
Learn morePenetrating Damp
Damp patches that grow after rain, at any height, on any floor — penetrating damp is a building defect letting water through the fabric. We arrange the survey that finds it and the repair that stops it.
Learn moreDamp Proof Courses (DPC)
A failed DPC lets ground moisture climb your walls. We arrange chemical DPC injection to BS 6576 — and honest surveys that tell you when a cheaper fix will do.
Learn moreDamp Surveys
The survey is the most valuable money you'll spend on a damp problem: it identifies the true cause before you pay for any treatment. We arrange damp and timber surveys across all of North London.
Learn moreDamp vs Condensation
More money is wasted treating condensation as 'damp' than on any other mistake in British housing. Here's how the two differ — and how to be sure before you spend anything.
Learn moreKitchen Damp
Kitchens combine every damp risk in one room: steam, plumbing, poor air movement behind units and often the coldest external wall in the house. We find which one is causing yours.
Learn moreLocal stock, local problems, local answers
North London's housing was largely built between 1850 and 1939: solid brick walls without cavities, slate or early bitumen damp proof courses now beyond their design life, suspended timber floors over clay, and rear additions built to a lower standard than the main house. Every one of those characteristics shapes how damp behaves here — and why it's so often misdiagnosed.
Our approach is diagnosis-led. Around three-quarters of "damp" reports in London flats turn out to be condensation; a large share of genuine rising damp turns out to be a bridged DPC fixable for a fraction of an injection quote. The survey establishes the truth of your property first; treatment follows the evidence. Every provider we work with follows BS 6576 methodology and PCA good practice, and every recommendation comes with a written report you can hold them to.
Our process
Tell us the problem
Call or use the contact form — describe what you're seeing and where. Photos help.
Survey & diagnosis
An independent qualified surveyor inspects the property and identifies the true cause, with a written report.
Clear written quote
You receive a costed scope for exactly what the property needs — no more, no less.
Treatment & verification
Works are carried out by vetted independent specialists, with guarantees where applicable and verification that the fix worked.
Frequently asked questions
Pattern is the clue: a low-level tide mark with salts suggests rising damp; rain-correlated patches at any height suggest penetrating damp; black mould on cold surfaces in winter suggests condensation. Our Damp Type Diagnostic gives an initial steer, and a BS 6576 survey confirms it with moisture profiling and salts analysis.
Surveys run £280–£450. Chemical DPC injection with replastering is £70–£120 per metre (£800–£1,500 for a typical wall; £2,500–£5,000 for a terraced ground floor). Penetrating damp repairs range £150–£3,000 depending on the defect. Condensation remedies are usually £300–£1,500.
We cover all the boroughs and neighbourhoods of North London — Barnet, Enfield, Islington, Camden and Haringey, and the neighbourhoods from Hampstead and Highgate to Muswell Hill, Crouch End, Finchley and beyond. See the areas menu for your local page.
Chemical DPC installations from the qualified providers we arrange typically carry 20–30 year product and workmanship guarantees; fabric repairs and ventilation works carry their own workmanship terms. Guarantee details are confirmed in writing before works start.
Yes — that's exactly what we recommend. The survey fee buys an independent diagnosis and written report; what you do with it is your choice. Many customers use it to obtain comparable quotes or to negotiate a purchase price.
Worried about damp, mould or a wet basement?
Speak to us today or book a survey — we'll arrange the right independent specialist for your property.