Greater London · London and the South East
Electronic Leak Detection in Northwick Park
Electronic leak detection in Northwick Park and the rest of Greater London. Surveys run seven days a week.
- Damp inside with no sign on the roof
- Water coming in under a flat roof
- Repairs that haven’t stopped the leak
Electronic leak detection in Northwick Park: what you get
Electronic leak detection works on many flat roof membranes over offices, units, blocks of flats and homes. It helps trace a leak you already have or check a new membrane before handover. We quote for each roof based on its size and build-up. We can test on weekdays and at weekends when conditions allow. Tell us about your roof to find out more. Typical surveys look at leaking laps in the waterproofing and breaches around outlets and penetrations, across flat roof membranes, roof terraces and balconies and liquid-applied waterproofing.
Commercial and residential blocks across London frequently 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 Northwick Park, access is agreed with whoever manages the roof before the visit. Plant bases, rooflights and cable entries are all places where water can get in.
The report is yours to share with whoever needs it: a seller or estate agent, an insurer, a roofer, a builder or a managing agent.
- Where
- Northwick Park (HA1, HA3, HA0)
- Region
- Greater London
- Cost
- Quoted for your roof
- Report
- Written, with photos, emailed to you
- Appointments
- Monday to Sunday, daytime
- Cover
- Professional indemnity and public liability
- Phone
- 07833 053749
- Last updated
- 27 October 2026
Honest limits
Every survey has limits, and it’s better to know them up front. Keep these in mind:
- How wet the insulation is
- Roofs whose membrane or build-up is not suitable
- Water entering through details rather than the membrane
If you are not sure which survey you need, ring 07833 053749 or drop us an email and we will give you a straight answer before you book. What a survey covers and doesn’t.
Roofs we survey in Northwick Park
- Roof terraces and balconies
- Green roofs
- Flat roof membranes
- Liquid-applied waterproofing
- Single-ply roofs
- Commercial flat roofs
What electronic leak detection looks like in Northwick Park
The wider area around Northwick Park has a long history of building, with Headstone Manor about 1.9 miles north-west. Older homes in the wider area frequently have features worth a closer look, like lead valleys, tall stacks and roofs that have been patched over the years, and the council can say whether a home is in a conservation area. Further from the centre, London’s housing takes in interwar semis with hipped roofs in clay or concrete tiles as well as slate-roofed terraces. Hips, bay roofs and later loft conversions are typical of those semis, if your home is one of them. Mixed in with those pitched roofs are a good many flat ones, over rear extensions, dormers, garages and shops.
The streets around a church like Saint Cuthberts Church are frequently among the oldest in a place, and if yours is one of the older homes nearby, flat-roofed rear additions and dormers added over the years are worth checking. For a London address like Northwick Park, it helps to know about controlled parking before the day.
Northwick Park is about 1 mile south-west of Kenton, in Greater London. We cover Northwick Park and the rest of Greater London. Northwick Park is one of the towns and villages in Greater London where we work. You can also see our page for London.
We survey roofs across the HA1, HA3 and HA0 postcode area for electronic leak detection and the streets around it. Local streets include Lyon Road, Manor Road and Gayton Road, all of which we cover. Main roads around Northwick Park include the A404. Nearby, we also carry out electronic leak detection in Greenhill (1 mile north-west), Harrow on the Hill (1 mile south-west), South Kenton (1 mile east), Kenton (1 mile north-east) and Harrow (1 mile west). We also work in nearby towns such as London (11 miles south-east), City of Westminster (9 miles south-east), Marylebone (9 miles south-east), Kensington (7 miles south-east), St Pancras (10 miles east) and Shoreditch (11 miles east).
Local landmarks in Northwick Park
Typical jobs here are in homes near St Anselm's Catholic Primary School, Orley Farm School and Preston Park, among other places. The nearest railway station is Kenton station, roughly 0.6 miles north-east of the centre. A little further out are Northwick Park Hospital (less than half a mile north-east) and Kodak Museum (1.5 miles north-west). Open spaces near Northwick Park include Masons Field and Northala Fields.
How it works
It’s useful to start with what’s prompted the survey: a purchase, a leak, a storm, new work or simply peace of mind. That way we can focus on what matters to you. The visit typically takes more time on a big roof than a small one, with the construction of the roof playing a part too. In a London area like Northwick Park, the main things to sort out are parking and access: 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 what can be seen safely from ground level, windows, the loft and, where it’s safe, the roof itself.
- First, we confirm which roof areas are included.
- We get the roof ready for testing.
- Testing runs across the agreed area.
- We mark the breach locations in our records.
- You receive the results to pass to your roofer.
Before the survey
- Find any records of previous roof work
- Keep pets out of the way during the survey
- Check we can get to the back of the property
How to book
You can call us seven days a week. For a price or to book, phone 07833 053749 or use the contact form.
Read more
Useful tips for Northwick Park property owners
These tips come from what we see on roofs every week, before and after a survey:
- Check trades protect the waterproofing
- Record dates and spots where water appears
- Find the breach before more patching
- Have roof specifications to hand
File the report with your roof paperwork. It shows the condition of the membrane on that date.
Keep outlets and gutters on flat roofs clear. Water that sits on the roof finds breaches faster.
Towns and villages near Northwick Park
Other services in Northwick Park
Your questions about electronic leak detection in Northwick Park
How do I find out if my home in Northwick Park is listed?
We cannot confirm that for you, but Historic England’s list and your council can. Both listing and conservation areas can limit changes of roofing material.
Do you carry out roof surveys in Northwick Park?
Yes. We work right across London and the South East, and Northwick Park is part of that. Just ring 07833 053749 or send us an email and tell us about the property, and we will talk through which survey suits.
How many surveys have you done?
We’ve completed more than 5,000 surveys, across 20+ years of surveying roofs, with 98% customer satisfaction.
How do I arrange electronic leak detection in Northwick Park?
Just ring 07833 053749 or send us an email with the address. After a few questions, we confirm the price and fix a day.
Do you survey roofs on blocks of flats?
Yes, once whoever controls the roof agrees access. We check the parts we are given access to.
What will the report tell me?
It works through the roof part by part, in writing and with photos, finishing with recommendations. Points are put in order of urgency where relevant.
What happens after the survey?
You receive the written report by email, with photos and recommendations. It is yours to share with a seller, insurer, roofer or managing agent, whichever applies.
What a survey costs
A few things affect what a survey costs:
- House, block, shop or office
- How big the roof is
- The shape of the roof and its details
- Height and safe access
Bigger, taller and commercial roofs take more time to survey, so the price reflects that. You will know the figure before booking.
Booking your survey
We’ll usually ask about:
- Any deadline, such as an exchange date
- Any stains, drips or damp patches you’ve seen indoors
- What made you get in touch
- The kind of building and roof involved
For a price for electronic leak detection in Northwick Park, phone 07833 053749 or drop us an email. A few details about the property and the roof help us price the survey accurately.
What we are asked to look at in Northwick Park
New membranes can have defects from installation. ELD on a new roof can show holes before they cause leaks.
Signs worth acting on include:
- Damage from equipment installers
- Leaks through a covered membrane
- Leaking laps in the waterproofing
- Leaks at pipes, outlets or fixings
For businesses in and around places such as St. Anns, the flat roofs over shops and commercial units are worth checking before a leak, not after.
What to check before booking
- How they’ll see the roof: from ground level, the loft, the roof or by drone
- Their report turnaround times
- What insurance they carry
- Whether the price includes VAT
How the survey changes by roof type
Bituminous membranes
Bituminous roofs often have laps and old repairs that can leak. We test where the roof suits it.
EPDM rubber roofs
ELD on EPDM depends on the product and the layers. We check before we quote.