Independent damp surveys in Bromley, Orpington and Beckenham
Bromley has larger houses on larger plots than most of London, which changes what goes wrong. Long roof runs, more rainwater goods, mature trees close to the building, and gardens that have been landscaped several times over. Very little of the damp we survey here starts at the wall it appears on.
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Bromley housing, and what it does when it gets wet
The dominant stock is interwar and post-war detached and semi detached housing, cavity walled with a working damp proof course. That means the diagnosis nearly always turns on something external. A bay roof with a shallow fall, a hopper head that overflows in heavy rain, a shared valley gutter between two roof planes, or a chimney flashing that has lifted. Any of these puts water into the wall a long way from where the stain appears inside.
Landscaping is the other half of the picture. These plots have been re landscaped repeatedly, and each time the ground tends to go up. Raised beds against the house, block paving laid over an existing drive rather than instead of it, and decking built off the wall all bridge the damp proof course. On a sloping plot, the uphill elevation collects everything the garden sheds, and the effect is seasonal rather than constant, which is a useful diagnostic in itself.
The subsoil across much of the borough is chalk with clay above it, and mature trees are common. That combination matters for timber and for movement rather than for damp directly, but it means we look at drainage runs carefully. A drain displaced by root growth under a solid floor produces a persistent damp patch that responds to nothing done to the wall, and it is easy to spend a lot of money before anyone lifts the manhole cover.
What we are usually called out to in Bromley
- A damp patch on a bedroom wall traced to a lifted chimney flashing or an overflowing hopper head
- Raised patios, block paving and decking bridging the damp proof course on a house that never needed treating
- Seasonal damp on the uphill elevation of a sloping plot where garden drainage runs at the house
- Bay roofs with too shallow a fall, ponding and letting water in at the junction with the main wall
- Displaced or root damaged drains under solid ground floors producing persistent localised damp
- Timber decay in roof voids and bay roofs where a slow leak has run for years without showing inside
Which kind of damp is it?
In a London building the same stain can have four or five different causes, and in Bromley 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 Bromley 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
Inside the report
Each Bromley report follows the same order, so it reads easily to a buyer, a landlord or a court:
- Scope and conditions on the day
- Observations, with photographs
- Measurements, with where each was taken
- Conclusions on cause
- Recommendations and an outline cost
- Limitations: what was not inspected and why
How a survey is arranged
- Tell us the postcode, the property type and what has been noticed.
- We confirm the fee and the time. It does not change on the day.
- On site, outside first, then inside, with findings explained before we leave.
- The report arrives within a day, ready to forward to a solicitor, agent or freeholder.
Buyers, landlords, tenants and leaseholders in Bromley use our reports for different reasons, but always because the report has nothing behind it. We carry out no remedial work and take no referral fees, so our conclusion is not shaped by what it would lead to. Quoted for damp proofing already? Read damp proofing in Bromley: survey first.
Leaseholders, landlords and buyers in Bromley
Leaseholders in Bromley often discover that the cause of their damp sits in a part of the building they do not own. Our report says where the water is coming from and which element of the building it passes through, which is the evidence a freeholder or managing agent needs under the lease. For landlords, damp and mould are hazards under the Housing Health and Safety Rating System, and social landlords in England now work to the fixed timescales of Awaab's Law. Our guide to Awaab's Law explains what that means.
By town
Orpington
Orpington is largely 1930s ribbon development and the estates that filled in behind it, on chalk, with a bay fronted semi as the standard house. The damp we see here mostly begins at the back: kitchen and bathroom extensions built across the original airbricks, so a suspended floor that was ventilated for sixty years suddenly is not, and a patio laid up to the rear wall a course or two higher than the drive at the front. The front elevation reads dry, the back reads wet, and the house has not changed. Its surroundings have.
Beckenham
Beckenham has the larger late Victorian and Edwardian houses, a good share of them divided into flats, and that division is the recurring problem. A leaking valley gutter or a failed hopper on a converted house wets a flat two floors down, and the first question is who is responsible for the roof rather than what is wrong with it. Solid walls that have been cement rendered in the last fifty years are the other constant, and the low ground along the Beck towards Kelsey Park sits wetter than the ridge above it.
Chislehurst
Chislehurst is Edwardian and interwar houses on large, heavily wooded plots along the ridge. The trees are the point. A north elevation under a mature canopy never dries between showers, moss builds on the tiles and gutters block with leaf litter every autumn, and the damp that results is penetrating rather than rising, however low on the wall it shows. Where the garden falls towards the house, gullies fill with leaves and surface water reaches the wall before it reaches the drain.
Where we cover
We survey across the borough and out to the Kent boundary.
- Bromley
- Beckenham
- Orpington
- Chislehurst
- Petts Wood
- West Wickham
- Hayes
- Shortlands
- Biggin Hill
Postcode districts
- BR1
- BR2
- BR3
- BR4
- BR5
- BR6
- BR7
What customers say about us
Professional friendly service. Highly recommended
Lisa Range, on Google
Excellent, came around on the same day, found the issue and gave advice through the process
Morris Seifert, on Google
Bromley questions
The damp only appears in winter. What does that tell you?
Quite a lot. Damp that is genuinely seasonal usually points at something driven by weather or ground water rather than at a constant defect: driving rain on an exposed elevation, garden drainage running at the house on a sloping plot, or a gutter that only overflows above a certain rainfall. Constant damp, unchanged through the year, points somewhere else entirely, typically a plumbing leak or a drain. The pattern over time is evidence, so it is worth telling us when you first noticed it and what the weather was doing.
Do you need to come inside, or can it be diagnosed from outside?
Both, and the outside is usually where the answer is. We take calibrated readings internally to establish where the moisture is and how much of it there is, then work outside to find where it is entering: ground levels, drainage, rainwater goods, roof junctions, flashings and pointing. A survey that only looks at the inside face of the wall can tell you a wall is wet. It cannot tell you why, and why is the part you are paying for.
Our Beckenham flat is damp on the top floor. Who fixes the roof?
In converted houses the roof is usually a common part and the freeholder's responsibility. The report identifies the source.
Do trees cause damp in Bromley houses?
Indirectly. Leaves block gutters and valleys, and large trees on clay can affect drains. Both are common sources of damp here.
Do you survey for buyers in Bromley?
Yes. The report is ready within 24 hours of the visit, in time to inform negotiations.
Will you try to sell me damp proofing in Bromley?
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 Bromley
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