Greater London · London and the South East
Electronic Leak Detection in Park Royal
Electronic leak detection in Park Royal from an independent, experienced roof surveyor. More than 20 years and over 5,000 surveys.
- Repairs that haven’t stopped the leak
- Holes left by work on the roof
- Waterproofing to test before it is covered
Roof by roof
Green and ballasted roofs
Roofs with planting or ballast hide the membrane. Testing may still be possible but it depends on the layers.
Bituminous membranes
Older felt roofs often have seams and patches where breaches occur. We test where the roof suits it.
How electronic leak detection works in Park Royal
There are different ELD methods. Low-voltage testing is normally done with the surface wet, while high-voltage testing needs a dry, exposed membrane. Which one suits depends on the membrane and the layers of the roof and we explain which we will use. We’ll say if your roof doesn’t suit either method before any testing starts. If you’ve noticed leaks showing away from the breach and punctures from foot traffic or tools, we can find out what’s behind it.
Commercial and residential blocks across London often have big flat roofs with plant, rooflights and access walkways. Each pipe, upstand and fixing through the covering is a possible weak point. For a building in Park Royal, access is agreed with whoever manages the roof ahead of the visit. Rooflights, plant supports and pipe entries are common places for a membrane to fail.
Pictures do a lot of the work in our reports, because a photo of a cracked flashing says more than a paragraph. Anything out of sight on the day is listed as such.
- Place
- Park Royal (NW10, W3, W5)
- Region
- Greater London
- Prices
- Quoted for your roof
- Reports
- Written, with photos, emailed to you
- When we survey
- Weekdays and weekends
- Insurance
- Professional indemnity and public liability
- Call
- 07833 053749
- Updated
- 27 October 2026
Landlords, agents and block managers in Park Royal
An agent can book and manage the survey for a landlord, with the report sent to whoever needs it. Access is agreed with the tenant ahead of time.
For blocks of flats, a roof survey helps managing agents and residents’ management companies plan ahead. The report sets out what needs attention now and what can wait, which helps with budgets and planning.
Common questions in Park Royal
Can parking be tricky for a visit in Park Royal?
In much of London, parking needs planning: a visitor permit or a nearby bay makes the day run more smoothly, so mention what’s available when booking.
Do you cover commercial flat roofs around Park Royal?
Yes, commercial buildings, hotels included, are part of the work. Roof access is agreed with the building manager or owner beforehand.
Will you go up on the roof?
Only when it’s safe. Safe viewpoints, the loft space and a drone where applicable cover most of what’s needed.
What does the report include?
It works through the roof part by part, in writing and with photos, and ends with what we recommend. The most urgent items are made clear.
Do you test for asbestos?
No. We don’t sample or test for asbestos. Where a material might contain it, such as old cement sheets on a building from before 2000, the report flags it, with a recommendation to have a specialist asbestos surveyor check before it is disturbed.
What happens next?
We email you the written report with photographs and recommendations. You can use it to talk to a seller, an insurer, a roofer or a managing agent, whichever applies.
Do you survey on Saturdays and Sundays?
We survey on any day from Monday to Sunday, during the day, which suits people who work during the week. Let us know your preferred days when booking.
What we can’t see
To be straight with you, a roof survey has limits:
- Build-ups without a suitable layer below
- Areas we cannot reach or that cannot be tested
- How wet the insulation is
If in doubt, call 07833 053749 or send us an email and we’ll suggest the right survey before you book. What a survey covers and does not.
What this survey covers
- Commercial flat roofs
- Green roofs
- Flat roof membranes
- Liquid-applied waterproofing
- Roof terraces and balconies
- Single-ply roofs
How it works
There is not much for you to do on the day. Point out anything you’ve noticed, like stains, drips or loose pieces, and we will take it from there. The survey itself takes more time on a big roof than a small one, and the build-up of the roof makes a difference too. For a visit in Park Royal, parking and access are the things to plan: let us know about permits, visitor bays or off-street space, which floor the property is on and how to get into the loft. We then look at whatever is safely visible from the ground, windows, the loft and, where it’s safe, the roof itself.
- You tell us about the roof and where water is showing.
- The roof is assessed for suitability first.
- We choose a low-voltage or high-voltage method to match the roof.
- The membrane is tested and breaches are found.
- A report with photos shows where each breach is.
Getting ready for the survey
- Jot down any questions you want answered
- Note where any stains or damp appear
- If the roof is shared, arrange access with whoever manages the building
Book a survey
We survey roofs on weekdays and at weekends. To find a date that works for you, ring 07833 053749 or use the contact form.
Read more
Towns and villages near Park Royal
What else we do in Park Royal
Tips from our surveys
You don’t need to be a roofer to help. Here’s what helps most:
- Don’t leave water getting in
- Don’t let outlets block
- Share any drawings of the roof
- Test new membranes before covering them
If we think the leak isn’t coming through the membrane, the report says so, so other causes can be checked.
Don’t leave a flat roof leak running. The longer water gets in, the more insulation and decking can be affected.
Flat and commercial roofs around Park Royal
Alongside Victorian and Edwardian terraces, outer London has a great many interwar semis, frequently with hipped roofs of clay or concrete tiles. If your home in Park Royal is one of them, bay roofs, hips and later dormers each have their own details. Alongside them, flat-roofed extensions, dormers, garages and commercial units are common almost everywhere. Park Royal has a number of hotels within about a mile and a half, and hotels, like offices and blocks of flats, frequently have flat roofs. For hotels and other commercial buildings, finding the cause of a flat roof leak quickly keeps rooms in use.
If you run a business near London Designer Outlet, flat roofs over shops and units are easy to forget until water comes through a ceiling. The streets around a church such as St Gabriel's Church are often among the oldest in a place, and if your house is among the older ones nearby, later flat-roofed additions are common on older houses, and their edges and upstands frequently show the first signs of wear. If you let a flat or house near Harlesden station, flat roofs on let property tend to be checked only when they fail, which is the costly way round.
Park Royal is about 1 mile south-west of Harlesden, in Greater London. If you are in Park Royal, booking works exactly as it does anywhere else: get in touch, agree the price and pick a day. Park Royal is one of the places in Greater London where we work for electronic leak detection. There is also a page for London.
All of NW10, W3 and W5 is covered for electronic leak detection, from the main roads to the quietest streets. Local streets include Dukes Road, Abbey Road and Grieg Road, all of which we cover. Other places close to Park Royal include West Twyford (1 mile north-west), Hanger Hill (1 mile south-west), Stonebridge (1 mile north), Stonebridge Park (1 mile north) and Old Oak Common (1 mile east). Further out, we also cover London (8 miles east), City of Westminster (5 miles east), Marylebone (5 miles east), Kensington (4 miles south-east), St Pancras (7 miles east) and Shoreditch (8 miles east).
Landmarks near Park Royal
Around Park Royal, our work takes us to homes and buildings near St. Raphael's Edible Garden, Grand Junction Arms and The Ellen Wilkinson School for Girls and the streets around them. Other local landmarks include Library for Iranian Studies (1.5 miles south) and The Ellen Wilkinson School for Girls (1.1 miles south-west). The nearest railway station is Harlesden station, roughly 0.8 miles north-east of the centre. Other landmarks nearby include London Designer Outlet (2 miles north) and London Transport Museum Depot (1.7 miles south). Not far away are Castlebar Hill and Kew Gardens Lake.
What affects the price in Park Royal
What a survey costs depends on the time and equipment it needs. That comes down to:
- Extensions, dormers and garages with roofs of their own
- How complicated the roof is, with its valleys, chimneys and parapets
- Whether it is a home or a commercial building
- The roof’s overall size
All our prices include VAT. We quote electronic leak detection for each roof, as the method and time depend on the roof. You’ll know the price for your roof before you book.
Helping us price your survey
Before you get in touch, it helps to have:
- How the loft is reached, if there is one
- The address and postcode of the property
- What made you get in touch
- The type of building and roof, such as pitched or flat
For a price for electronic leak detection in Park Royal, call 07833 053749 or send us an email. Some details about the property and the roof help us give you an accurate price.