Independent damp surveys in Hillingdon
Hillingdon is Metroland at its western end, with the interwar semis that followed the Metropolitan line, and industrial era housing around Hayes and Southall built for the factories. It also sits on Thames gravel over clay through much of its area, which matters for drainage and for what happens under solid floors.
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Hillingdon housing, and what it does when it gets wet
The interwar suburb through Ruislip, Ickenham and Eastcote is cavity walled with functioning damp proof courses, airbricks and suspended timber floors. The dominant fault is the one that dominates every interwar borough: ground level raised over ninety years of drives, paths and patios until it bridges the course. It presents as low level damp on an internal wall and is misdiagnosed as rising damp with monotonous regularity.
The Hayes and Yiewsley housing built for the factories is smaller, denser and often solid walled, with less generous foundations and, in the older examples, damp proof courses that are either failing or absent. That is one of the few contexts in the borough where a genuine rising damp diagnosis is plausible, and it still needs establishing rather than assuming.
The gravel over clay produces free draining ground near the surface with a much slower layer beneath, so water can perch above the clay and move laterally toward buildings. Combined with mature trees and ageing clay drainage, displaced drains under solid floors are a recurring finding, giving persistent localised damp that no wall treatment addresses.
What we are usually called out to in Hillingdon
- Ground raised above the damp proof course on interwar Metroland semis
- Older solid walled housing where a damp proof course is failing or absent
- Water perching on clay beneath free draining gravel and moving toward buildings
- Displaced and root damaged drains under solid ground floors
- Blocked airbricks and musty suspended timber ground floors
- Slumped or bridging retrofit cavity insulation on weather exposed elevations
Rising, penetrating, condensation or a leak
A tide mark low on a Hillingdon wall is often called rising damp on sight. It may be. It may equally be a patio laid against the outside, a front area drain that has stopped draining, salts left behind by an old leak, or condensation collecting behind furniture on a cold wall. A pin meter cannot tell these apart, because salts and surface moisture make it read high regardless.
The survey works through the possibilities in order and records why each was accepted or ruled out, so that whoever reads the report, a solicitor, a freeholder or a contractor, can follow the reasoning.
What an ATi survey in Hillingdon 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 Hillingdon: 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 Hillingdon.
- 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.
We do not sell damp proofing, tanking, ventilation units or timber treatment. In Hillingdon, as everywhere in London, that independence is what makes the report useful to a buyer negotiating a price, a tenant raising a disrepair issue, or an owner deciding whether a quote is justified.
Leaseholders, landlords and buyers in Hillingdon
Leaseholders in Hillingdon 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
Uxbridge and Hillingdon
Interwar and post war suburbs with older buildings near the centres. Drives, extensions and condensation recur.
Ruislip and Northwood
Interwar suburbs, many with Metro-land character, and older village cores. Rainwater under mature trees and drives over the course dominate.
Hayes and West Drayton
Victorian and interwar housing and newer developments near the canal and the Colne valley. Groundwater on low ground and ventilation in new homes are typical.
Where we cover
We survey across the borough, from Uxbridge and Ruislip out through Hayes and Yiewsley to West Drayton and Northwood.
- Uxbridge
- Ruislip
- Hayes
- Northwood
- Ickenham
- Eastcote
- West Drayton
- Yiewsley
- Harefield
Postcode districts
- UB3
- UB4
- UB7
- UB8
- UB9
- UB10
- HA4
- HA6
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
Hillingdon questions
Is rising damp ever the right diagnosis?
Yes, and it is far rarer than it is diagnosed. It requires a wall in contact with damp ground and either no damp proof course or one that has genuinely failed, which in this borough mostly means older solid walled housing rather than the interwar stock. Even then, it has to be distinguished from a bridged course, a defective drain and lateral water. The point is not that rising damp does not exist, it is that four other things look exactly like it and three of them are cheaper to put right.
What does the ground under the house have to do with it?
More than most people expect. Free draining gravel over clay lets water move down easily and then stops it, so it can perch on the clay and travel sideways toward a building rather than continuing down. That produces lateral water at foundation level, which behaves nothing like rising damp and does not respond to the same remedies. It also means drainage runs matter, because a leaking drain in that ground disperses less readily than it would in chalk.
Do Ruislip semis need damp proofing?
Rarely. Their courses usually work; drives and patios are the common cause.
Our West Drayton house is near the river. Is it groundwater?
On low ground near the Colne it can be. The survey separates causes.
Do you survey bungalows in Hillingdon?
Yes, including roof spaces, sub floors and ventilation.
Will you try to sell me damp proofing in Hillingdon?
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 Hillingdon
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