Greater London · London and the South East
Flat roof survey in Harmondsworth, Greater London
An experienced roof surveyor for flat roof surveys in Harmondsworth. Over 5,000 surveys and 20+ years behind us.
- Blisters and bubbles in the covering
- Leaks around rooflights
- Signs of deflection in the roof deck
Rented homes, blocks and businesses
Managing agents and residents’ management companies use roof surveys to plan maintenance. Recommendations are set out with the most urgent first where relevant, which helps when budgeting.
Businesses and commercial landlords can book us too, including offices, shops and units. Bigger roofs take more time.
Flat roof surveys for homes and businesses in Harmondsworth
Our flat roof survey checks the waterproof covering and every detail around it, from edges and upstands to outlets and rooflights. Felt, asphalt, EPDM, GRP and single-ply PVC or TPO roofs are all part of the work. It suits a small roof over an extension or garage as well as a large one over flats, offices or units. You get a report with photos and our recommendations. We survey single-ply membranes, mastic asphalt and EPDM rubber, and the problems we are asked to look at most are cracked or split membrane and outlets that hold water back.
Water getting through a flat roof in London can travel under the covering and appear some way from the hole. Upstands against parapets, outlets and the edge where flat meets pitched are common entry points. In a block or conversion in Harmondsworth, the flat roof is often a shared part of the building.
The report is yours to share with whoever needs it: your solicitor, the seller, your insurer, a roofer or the building’s managing agent.
- Place
- Harmondsworth (UB7, TW6)
- Wider area
- Greater London
- Price
- From £150 inc. VAT
- Report
- A written report with photos, by email
- When we survey
- Weekdays and weekends
- Cover
- PI and public liability insurance
- Phone
- 07833 053749
- Last updated
- 27 October 2026
Flat roof surveys in Harmondsworth: local notes
Within a mile and a half or so of Harmondsworth there are several hotels. For hotels and other commercial buildings, finding the cause of a flat roof leak quickly keeps rooms in use. Before planning roof work on an older home, find out whether it is listed or in a conservation area. Listed building consent covers changes to a listed building’s special interest, and an Article 4 direction can bring extra controls in a conservation area.
For hotels and guest houses around Harmondsworth, a roof problem found early is far less disruptive than one found by a guest, so it is worth knowing the roof’s condition. Anyone responsible for a site like Harmondsworth Primary School will know that schools and public buildings often have big flat roofs, and their outlets and upstands need regular checks.
Harmondsworth is about 1 mile south-west of West Drayton, in Greater London. Houses, flats, blocks and commercial buildings in Harmondsworth can all book flat roof surveys. We cover towns and villages across Greater London. Our London page covers surveys nearby.
Here we cover the UB7 and TW6 postcode area for flat roof surveys. We offer flat roof surveys to properties on Moor Lane, Hatch Lane and High Street and the roads around them. Other places close to Harmondsworth include Longford (1 mile south-west), Sipson (1 mile north-east), Heathrow (2 miles south-east), Harlington (2 miles east) and Stanwell (2 miles south). Further out, we also cover City of Westminster (14 miles east), Marylebone (14 miles east), Kensington (12 miles east), Hampstead (14 miles east), Ruislip (7 miles north-east) and Brompton (14 miles east).
Around Harmondsworth
We work in homes and buildings around Harlington Community School and The Five Bells Inn, among other places. The closest station to Harmondsworth is Heathrow Terminal 5 Rail station, roughly 1 mile south of the centre. Nearby you’ll also find British Airways Heritage Collection (3.5 miles north) and Harlington (1.4 miles east). Green spaces nearby include Crane Meadows and Staines Reservoirs.
Why it is worth a survey now in Harmondsworth
For a buyer, the best time to learn about a flat roof is before contracts are exchanged. Once you’ve exchanged, any work on the roof is down to you. Our report gives you specific points to raise with the seller or agent. Many older London roofs have only old felt under the slates, or no underlay at all, so once the slates or flashings let water past, little stops it reaching ceilings. Left unchecked, water soaks into timber and plaster and the damage spreads.
The Premium Survey includes thermal imaging and drone inspection where it applies, which starts from £400, including VAT. We can help you choose the package that fits what you’d like to know.
Why book us in Harmondsworth
- More than 5,000 surveys completed
- An independent view of the roof
- Customer satisfaction of 98%
- 20+ years’ experience
Take a look at how roof surveys are priced or our case studies.
Checking the roof from ground level
Look up at the roof after a storm, from the ground: broken slates or tiles in the garden, gaps along the ridge or loose lead are signs to note. Don’t go up yourself.
The one thing to avoid is getting up close. Roofs are fragile and slippery, and a fall can be serious. That part is for a survey, using safe viewpoints and a drone where applicable.
What affects the price in Harmondsworth
All our prices include VAT. The things that change the price are:
- How many separate roofs there are, such as extensions, dormers and garages
- House, block, shop or office
- Building height and the viewpoints available
- Roof area
Every price we give includes VAT. Flat roof survey starts from £150, including VAT. We confirm the exact price before booking.
What to tell us when you contact us
Before you get in touch, it helps to have:
- Where the property is, with the postcode
- The type of building and roof, such as pitched or flat
- Anything about access we should know
- Any deadline, like an exchange date
A quick phone call is normally the easiest start: call 07833 053749 or email us, and we will ask about the building and what you need. You will have a price before anything is arranged.
What we’re asked to look at in Harmondsworth
People go onto flat roofs for all sorts of reasons: to clean windows, fit aerials or air conditioning units, or reach a gutter. A covering that wasn’t designed for foot traffic can crack or puncture. New brackets and fixings through the roof are another common source of leaks.
A survey can pick up problems like:
- Blistering in felt or asphalt
- Splits, cracks and crazing
- Outlets choked with leaves and silt
- Gaps at upstands and abutments
If you let a flat or house near Heathrow Terminal 5 Rail station, the flat roof over a let home is worth a look before it becomes a tenant complaint.
Before you book any roof surveyor
- Whether the loft space is looked at, where there is one
- Are they insured for the work?
- What they won’t be able to tell you
- Which parts of the roof they’ll actually see
Also near Harmondsworth
Other services in Harmondsworth
What we do, step by step
Expect us to ask a few questions before we start, about the roof’s history, any leaks and past repairs. The inspection then takes between one and two hours at most homes; commercial roofs usually need 3–4 hours. In Harmondsworth, visits are available on weekdays and at weekends. It helps if you can point us to a visitor permit or a nearby bay, and to clear a path to the loft hatch. A back bedroom window can be the best vantage point for a rear addition, so we may ask to use one.
- You send us the address and, for commercial roofs, an idea of the roof’s size.
- Inside, we look for signs of water under the roof where we can reach.
- We view the roof from safe positions and never walk on fragile surfaces.
- We record every defect with a photo and its likely cause.
- The report explains the condition and recommends what to do first.
How to prepare
- Note where any stains or damp appear
- If you’re buying, check with the agent that we can get in
- For flats, make sure roof access has been agreed
Getting a price
If you’re buying, it’s useful to book soon after your offer is accepted, so you have the findings in time to act on them before you exchange. Otherwise, simply phone 07833 053749 or send us an email whenever suits you.
Related advice
FAQs for Harmondsworth
Can parking be tricky for a visit in Harmondsworth?
Usually it’s manageable with a little notice. Tell us what parking is available nearby, and the visit is planned around it.
How do I find out if my home in Harmondsworth is listed?
You can check whether a building is listed on Historic England’s list, and your council can tell you if it’s in a conservation area. If a home is listed, changes that affect its special interest need listed building consent, and in a conservation area re-roofing in different materials may need permission.
How many years has my flat roof got left?
We don’t give a fixed number of years, because so much depends on upkeep, exposure and workmanship. We describe the condition and say which work is urgent and which can wait.
Will you fly a drone over my roof?
Yes, where it applies and safe. We fly a sub-250g drone and we are a CAA-registered drone operator (Flyer ID and Operator ID). It’s included in the Drone Roof Survey and, where it applies, the Premium Survey.
Do you survey commercial flat roofs?
Yes. Offices, units, shops and blocks of flats are all part of our work. Larger commercial roofs are quoted for their size and access, so please ring 07833 053749 or use the contact form with the details.
When does the report arrive?
It depends on the package: Basic within 48 hours, Standard in 24–48 hours and Premium the same day. The report is emailed to you.
Will the survey show why my flat roof is leaking?
We check the whole roof, since water can travel before it shows inside. Every split, lap, upstand, outlet and rooflight we can see is checked. If the cause can’t be seen, we will say so and suggest what would help.