Independent damp surveys in Westminster
Westminster is stucco, mansion block and vault, most of it listed or in a conservation area, and almost none of it able to accept the standard damp remedy. What can be done to these buildings is tightly constrained, so the value of a survey here is in being told what will actually be permitted as well as what is wrong.
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Westminster housing, and what it does when it gets wet
The Georgian and Regency terraces are solid brick behind a lime stucco skin. Stucco is the weatherproofing layer, not decoration, and it needs maintaining as such. Once it cracks or hollows, water gets behind and is then held against the brick by the very render that was meant to keep it out. Repainting a blown section in a modern impermeable masonry paint, which happens on a five year cycle across the borough, seals the moisture in and accelerates the damage underneath.
Almost every one of these houses has vaults running under the pavement, built as coal stores and now used as plant rooms, gyms and utility space. A vault is below the water table in places, under a public highway nobody controls, and its roof is the pavement itself. Water entering through a failed pavement light or a cracked vault roof is a recurring and expensive problem, and the responsibility for the highway above complicates every repair.
The mansion blocks bring shared parapets, valley gutters, lightwells and long communal stacks. Water entering at roof level appears several floors down and often several flats along, which turns a maintenance question into a service charge dispute. Establishing the actual path of the water is usually the whole reason we are instructed.
What we are usually called out to in Westminster
- Blown or cracked stucco holding water against brick, sealed further by impermeable masonry paint
- Water into pavement vaults through failed pavement lights and cracked vault roofs
- Mansion block leaks entering at parapet level and presenting several floors below
- Listed building constraints ruling out the external repair that was recommended
- Lower ground and vault level timber decay where a wall has been persistently wet
- Service charge and dilapidations disputes needing an independent view of the defect
Which kind of damp is it?
In a London building the same stain can have four or five different causes, and in Westminster we regularly find two at once. Water rising from the ground through a wall with no working course. Rain entering through a parapet, a gutter, a cracked render or a window head. Moisture from the air condensing on a cold wall. Water from a pipe, a bath seal or a flat upstairs. Each needs a different repair and, in a shared building, often a different person to pay for it.
Our readings are taken to separate them: at depth as well as at the surface, at heights up the wall, on either side of the damp, and alongside humidity and surface temperatures. The pattern, not a single number, is what the diagnosis rests on.
What an ATi survey in Westminster includes
- Moisture readings taken on a grid and at height bands, so the report can show which way the water is moving
- The outside of the building, including front areas, lightwells, parapets and rear additions where access allows
- Communal elements that affect your flat: shared gutters, soil stacks, roof outlets and the party walls
- Humidity, air and surface temperatures where mould or condensation is in question
- Extract fans checked for where they discharge and how much air they move
- Timbers within reach, and the sub floor where a hatch or a lifted board allows
The report
Written within 24 hours of the visit, and structured for the people who will act on it in Westminster: you, your solicitor, a freeholder, a contractor.
- A summary of the cause and urgency on the first page
- Photographs and readings, located on the building
- Who is likely responsible for each defect, where it sits outside your demise
- Remedial recommendations as a specification for contractors to price
- An indication of what that work should reasonably cost
- What does not need doing, including any treatment already quoted
What happens when you request a survey
- A same day reply, with the fee and our first available times in Westminster.
- One surveyor, no sales visit to follow, because there is nothing to sell.
- A visit of one to two hours for most flats and houses.
- A written report with readings and photographs within 24 hours.
Most of our Westminster surveys are for one of four people: a buyer whose survey flagged damp, a tenant or landlord with mould, a leaseholder trying to get a freeholder to act, or an owner holding a damp proofing quote. Each needs the same thing, an account of the cause from somebody with no interest in the remedy, and that is all we provide.
Leaseholders, landlords and buyers in Westminster
Buying in Westminster? A homebuyer or building survey that recommends a damp specialist should be followed by somebody with nothing to sell. Our report arrives within 24 hours of the visit, in time to negotiate, and it separates what is wrong from what simply needs maintaining. Landlords and tenants use the same report to settle what is a building defect and what is condensation; see our note on Awaab's Law and landlord duties.
By town
Pimlico and Belgravia
Stucco terraces built in the nineteenth century, many listed and divided into flats, with basements and vaults under the pavement. Cracked stucco, front area drains and parapet gutters account for most of the damp, and responsibility is usually shared between freeholder and leaseholders.
Marylebone and Fitzrovia
Georgian and Victorian terraces, mansion blocks and mixed use buildings. Old roofs with many valleys and parapets, and flats above shops, mean damp often originates in a part of the building the occupant does not control.
Maida Vale and Bayswater
Mansion blocks and stucco terraces, with many lower ground flats. Lightwells, vaults and shared soil stacks recur, and condensation in basement flats with limited ventilation is common.
Where we cover
We survey across the City of Westminster, from Pimlico and Belgravia up through Mayfair and Marylebone to St John's Wood and Maida Vale.
- Marylebone
- Mayfair
- Pimlico
- Belgravia
- Bayswater
- Maida Vale
- St John's Wood
- Victoria
- Soho
Postcode districts
- W1
- W2
- W9
- SW1
- NW8
What customers say about us
Just want to say a huge thank you to Tom at ATI, from the initial survey to continued support in resolving a damp issue we have in our recently purchased property. The survey was prompt, detailed and had a clear solution on what our next steps are. During such a stressful time Tom has kept our minds at ease through this whole process, he really does go the extra mile and we couldn’t thank him enough!
Sanjay H, on Google
So If anyone else is having issues like ourselves don’t hesitate to get in contact with Tom he will certainly look after you.
Had ATI Damp Surveying & Reports come out after being told by another company that we needed a new damp proof course. There was damp showing on the downstairs wall and we weren’t really sure what was causing it.
Karolina Ciszek, on Google
Tom carried out a really thorough inspection and took the time to explain what he was looking for. He found that the issue was actually coming from the external wall rather than rising damp, which saved us from spending money on work we didn’t need.
Really happy with the service. The report was clear, professional and gave us a much better understanding of what was going on. Would definitely recommend ATI to anyone who’s unsure about the cause of damp before committing to any remedial work.
Westminster questions
Who is responsible for a damp vault under the pavement?
It is one of the more tangled questions in this borough and it turns on where the water is entering. The vault itself is normally part of your demise or freehold, but its roof is the public highway and the pavement lights in it are often the local authority's to maintain. Our report records the entry point precisely, which is what determines who you are asking to repair it. Without that, these arguments run for years.
Our building is listed. Will you recommend work we cannot get consent for?
No. A report that specifies external wall insulation or replacement windows on a listed terrace is worthless, however accurate the diagnosis. We survey knowing the constraint and concentrate on what can be delivered: lime based repairs to render and pointing, drainage and rainwater goods, internal breathable finishes, ventilation and heating. Where consent will be needed, we say so and say for what.
Our Pimlico basement flat has damp under the front window. Why?
Front lower ground walls usually retain the pavement and vaults, and a blocked area drain or a leaking vault puts water straight against them. The survey checks the front area and vaults before anything internal is considered.
Who is responsible for damp in a Westminster mansion block?
It depends on the lease. Roofs, external walls and shared services are commonly the freeholder's or management company's. The report identifies the source, which is the basis for a claim under the lease.
Can you survey a listed building in Westminster?
Yes. Surveys are non invasive by default, and recommendations are written with listed building and conservation area controls in mind.
Will you try to sell me damp proofing in Westminster?
No. We carry out no remedial work, so there is nothing to sell after the survey. The report states the cause, the work that would actually fix it and an outline of what that work should reasonably cost, so you can get like for like quotes from contractors of your choice, or put it to a seller, landlord or freeholder.
Nearby
Book a damp survey in Westminster
We survey and report only, with no treatment to sell, so what the report says is the whole of our interest. Same day response to every enquiry, and a written report with photographs within 24 hours of the visit.
Book a survey or call 020 3355 4944