Greater London · London and the South East
Roof Leak Investigation in Harmondsworth
Tracing where water is getting into your roof in Harmondsworth, using drones and thermal imaging where applicable. Get in touch for a price.
- Stains around a skylight
- Wet patches high on an inside wall
- Brown rings on upstairs ceilings
Roof leak investigation in Harmondsworth: what you get
Our roof leak investigations cover Harmondsworth and the wider South East. We visit on weekdays, Saturdays and Sundays. We look inside and out, at flashings, valleys, chimneys, gutters and flat roof details. You get a report with photographs and recommendations. If water is coming in now, catch it in a bucket and keep it away from lights and sockets, and then phone 07833 053749 or send us an email. If you’ve noticed wet patches high on an inside wall and condensation that looks like a leak, we can find out what’s behind it.
In London, leaks often start somewhere hidden: a butterfly roof’s central valley gutter, a parapet gutter, a chimney flashing or a flat roof over a back addition. Whether you are tracing a leak or recording storm damage in Harmondsworth, those are among the first places to look. Water from a hidden gutter can run along joists and show up a room or two away.
The Standard Survey adds moisture detection, a structural check and a follow-up consultation. The Premium Survey adds thermal imaging, drone inspection where applicable, structural analysis and an in-person consultation.
- Where
- Harmondsworth (UB7, TW6)
- Wider area
- Greater London
- Price
- From £150 inc. VAT
- Your report
- A written report with photos, by email
- Survey days
- Monday to Sunday, daytime
- Cover
- Professional indemnity and public liability
- Telephone
- 07833 053749
- Updated
- 27 October 2026
Surveys for landlords and agents in Harmondsworth
For blocks of flats, a roof survey helps managing agents and residents’ management companies plan ahead. Recommendations are set out in order of urgency where relevant, which helps with budgets and planning.
We also survey roofs for businesses and commercial landlords, from shops and offices to industrial units. Larger roofs take longer, so they’re priced to suit.
Also near Harmondsworth
More services for Harmondsworth
Can I check my roof myself?
After strong wind, take a look from the pavement or garden: broken slates or tiles in the garden, gaps along the ridge or loose lead are signs to note. Leave anything above ground level to a survey.
A lot can be seen from ground level. Binoculars help you spot slipped slates or tiles, gaps along the ridge and a leaning stack. Please don’t climb up for a closer look.
Prices for roof leak investigations in Harmondsworth
Every roof is different, so prices are confirmed before you book. This is what makes a difference:
- The number of roofs, including extensions and garages
- Basic, Standard or Premium
- Whether it is a home or a commercial building
- Whether thermal imaging or a drone is needed
Our price is from £150, including VAT. Packages run from Basic at £150 through Standard at £250 to Premium at £400, inc. VAT, and we’ll tell you which fits.
Booking your survey
There is no need for technical words. It’s enough to tell us:
- The kind of building and roof involved
- The address and postcode of the property
- Any stains, drips or damp patches you’ve seen indoors
- Pictures from the garden or a window, if you have them
We confirm the price for your survey before you book, so you know where you stand. Our price is from £150, including VAT. For a price for your roof, call 07833 053749 or drop us an email.
The survey, step by step
When we arrive, we begin with a quick chat about the roof and anything that is worrying you. We then inspect everything that can safely be seen. The survey normally takes about one to two hours, more where the leak is intermittent or the roof is large. For a visit in Harmondsworth, parking and access are the things to plan: let us know about parking, the floor the property is on, any shared entrance and loft access. On the day, the roof is looked at from the ground, from windows, from inside the loft space and from the roof where it is safe.
- You tell us where the water appears, when, and what the weather was doing.
- Inside, we look at the stain and the ceiling around it.
- In the loft, we follow any signs of water back towards the roof.
- We inspect the likely entry points outside, from the ground, windows and the roof where safe.
- We email a written report showing where the water most likely gets in.
Preparing for the visit
- Dig out any old roof reports or invoices
- Show us where any leaks or stains appear
- Make sure pets are kept safely away
Booking a survey
For a price for roof leak investigations in Harmondsworth, ring 07833 053749 or use the contact form. The address, the type of property and what you need to know help us price the survey accurately.
Related advice
What we look for on each type of roof
Chimney stacks
A stack has several possible ways in for rain. Each is checked from every safe vantage point.
Lead flashings
Mortar fillets are sometimes used instead of lead. They crack as the roof and wall move, letting rain run behind the joint.
When to book a survey in Harmondsworth
Chimneys can let water in by several routes. Water can enter through crumbling mortar, cracked flaunching, worn flashings or uncapped pots. The damp may appear on a chimney breast, a ceiling or in the loft.
It’s worth booking a survey if you’ve seen:
- A leak that comes and goes with the weather
- Wet patches high on an inside wall
- Damp underlay across a wide area
- Brown rings on upstairs ceilings
Controlled parking zones are common in London, so mention any permit rules for Harmondsworth.
Before booking anyone
- Their track record with similar roofs
- Their report turnaround times
- What exactly goes into their report
- Whether you can ask questions once you have the report
Roof leak investigations in Harmondsworth: local notes
In outer London, interwar semis with hipped, tiled roofs sit alongside older slate-roofed terraces. On a semi of that age, the small roofs over the bays, the hip tiles and any later dormer each need their own look. The covering and its details give the first clues when tracing where water is coming from. Before planning roof work on an older home, find out whether it’s 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 site and facilities teams at buildings such as Harmondsworth Primary School, on a building that size, finding the source of a drip means looking well beyond the stain. Take an older house close to Church of St Mary: leaks on older roofs frequently start at lead flashings, valleys or around old chimney stacks.
Harmondsworth is about 1 mile south-west of West Drayton, in Greater London. We provide roof leak investigations for homes and businesses in Harmondsworth. Harmondsworth is one of the places in Greater London we cover. We also survey roofs in London.
We survey roofs across UB7 and TW6 for roof leak investigations. If you need a roof leak investigation at a property on Moor Lane, Hatch Lane and High Street or anywhere close by, we can survey it. 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). We also work in nearby towns such as 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).
What’s near Harmondsworth
Around Harmondsworth, our work takes us to homes and buildings near Harlington Community School and The Five Bells Inn, among other places. The nearest railway station is Heathrow Terminal 5 Rail station, about 1 mile south. Nearby you will 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.
Common questions in Harmondsworth
Is my home in Harmondsworth listed or in a conservation area?
Start with Historic England’s list for listing and your council for conservation areas. Either can affect what roof work is allowed, so it is worth checking before planning any.
Is Harmondsworth in the area you cover?
Yes, Harmondsworth is one of the places we work. The survey and report are the same in Harmondsworth as anywhere else, and visits run on weekdays and weekends.
Do you look in the loft space?
Usually, if there is one and it can be reached safely. The loft space can show things the outside cannot, such as damp timbers, staining or daylight.
Are you structural engineers?
No. We note visible signs like sagging or deflection, but we do not carry out calculations or give an engineer’s opinion. If we think you need an engineer, the report says so.
Are you insured?
Professional indemnity and public liability insurance cover our surveys. Ask if you need details for a managing agent or building owner.
What’s the best way to book?
Just ring 07833 053749 or email us. We’ll ask a few questions, confirm the price and agree a date, weekday or weekend.
Can a leak be traced on a dry day?
Normally, yes. Damp materials can be found without rain. For leaks that only happen in certain storms, we report the most likely routes.