Greater London · London and the South East
Northolt Roof Leak Investigation
Know where you stand with the leaking roof before you spend money on it. Roof leak investigations in Northolt, with photos and a clear written report.
- Damp walls below an overflowing gutter
- Damp patches next to the stack
- Stains around a skylight
Practical tips
Most of what helps is simple and safe from the ground. Our suggestions:
- Let us know if there are tanks or pipes in the loft
- Keep water away from lights and sockets
- Leave roof access to professionals
- Take dated photos of the leak
If there are several possible sources, we list them in order of likelihood. Recommendations are prioritised by urgency where relevant, so you know what to deal with first.
Check the loft after heavy rain, with care and a good torch. Look for drips, damp patches and stains on timbers. Photograph anything new.
How a roof leak investigation works in Northolt
Flat roofs leak in their own ways. Splits, blisters, failed laps, worn upstands and blocked outlets are common causes. Ponding water makes any weakness worse. We check both the covering and the room underneath to narrow it down. Leaks under flat extension, garage and dormer roofs are common. An ageing felt roof is a frequent culprit. We survey rooflights and dormers, chimney stacks and valleys and parapet gutters, and the problems we’re asked to look at most are damp underlay across a wide area and staining around the chimney inside.
In a London flat, water can travel some way before it shows. That makes the source hard to pin down, and finding it matters for whoever has to deal with it. We look at what we’re given access to in Northolt, inside and out. Let us know when the water shows, and in what kind of weather.
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.
- Place
- Northolt (UB5, UB6)
- Region
- Greater London
- Prices
- From £150 inc. VAT
- Your report
- Written, with photos, emailed to you
- Survey days
- Weekdays and weekends
- Insured
- PI and public liability insurance
- Telephone
- 07833 053749
- Page updated
- 27 October 2026
Northolt roofs and the weather
Alongside Victorian and Edwardian terraces, outer London has a great many interwar semis, often with hipped roofs of clay or concrete tiles. Hips, bay roofs and later loft conversions are typical of those semis, if your home is one of them. Knowing the roof type helps narrow down where water may be getting in. Historic houses such as Northolt Manor, about 0.3 miles south, show how far back building in the area around Northolt goes. On older houses around here, roofs frequently carry the marks of earlier repairs, from replaced slates to new lead, and a listed home or one in a conservation area may need consent for changes of material.
Anyone responsible for a site like Willow Tree Primary School will know that a leak through a large roof is often found some distance from where the water shows inside. Shop and office owners around St. George's Shopping Centre may find that water through a ceiling can damage stock and close a sales floor, so the source needs finding fast. If you let a flat or house near Northolt Park station, finding the cause of a leak fast keeps a tenant’s home dry and the work focused.
Northolt is about 2 miles south-west of Harrow, in Greater London. Surveys in Northolt work the same way as everywhere we cover: a careful inspection, photos and a written report. Our Greater London coverage includes Northolt. For surveys nearby, see our London page.
Roof leak investigations in UB5 and UB6 work the same way as everywhere else we cover. We offer roof leak investigations to properties on Church Road, Eastcote Lane North and Tenby Gardens. Nearby, we also carry out roof leak investigations in South Ruislip (1 mile north-west), Greenford (1 mile south-east), South Harrow (1 mile north-east), Yeading (2 miles south-west) and Yiewsley (2 miles south-west). Larger places within reach include London (12 miles east), City of Westminster (10 miles east), Marylebone (10 miles east), Kensington (8 miles south-east), St Pancras (11 miles east) and Shoreditch (13 miles east).
Local landmarks in Northolt
Around Northolt, our work takes us to homes and buildings near Northala Fields, The Greenwood Public House and Northolt High School and the streets around them. Northolt’s nearest station is Northolt Park station, about 0.7 miles north-east. A little further out are Heath Robinson Museum (3.1 miles north) and Clementine Churchill Hospital (2 miles north-east). Not far away are Islip Manor Meadows and Northala Fields.
Surveys for landlords and agents in Northolt
Landlords, agents and building managers in Northolt and across Greater London can book any of our surveys. For a price for a let property or a block, phone 07833 053749 or drop us an email.
Letting agents can arrange access with tenants. We survey on weekdays, Saturdays and Sundays, which can make access easier.
Places near Northolt
What else we do in Northolt
What we do, step by step
Every roof is different, but as a rough guide the survey takes roughly 1–2 hours at a typical home, or half a day or so for a commercial building. You’re welcome to ask questions while we’re there. For a visit in Northolt, 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 roof space and from the roof where it is safe.
- We help you choose the package that suits the leak.
- A visit is booked for a weekday, Saturday or Sunday.
- The investigation works from the stain back to the roof.
- Moisture detection and thermal imaging are used where your package includes them and they help.
- The report explains the likely entry point and what needs attention.
Before we arrive
- Agree roof access with the managing agent if it’s shared
- Clear the way to the loft hatch
- Tell us about parking before the day
Arrange a survey
To book a survey, phone 07833 053749 or use the contact form and let us know the address and what’s prompted the survey. You’ll know the price before anything is booked.
Read more
What affects the cost of roof leak investigations
What a survey costs depends on the time and equipment it needs. That comes down to:
- Whether it is a home or a commercial building
- Basic, Standard or Premium
- If the survey needs thermal imaging or a drone
- The height of the building and how the roof can safely be seen
Prices start from £150, including VAT, for a Basic Survey. The Standard Survey starts from £250 and the Premium Survey from £400. You’ll know the price for your survey before booking.
What to let us know when you get in touch
You do not need to know any roofing terms. It is enough to let us know:
- The type of building and roof, such as pitched or flat
- Any deadline, like an exchange date
- Anything about access we should know
- Your postcode, so we can check access and travel
To get a price for roof leak investigations in Northolt, 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.
Why get it checked now?
Water and electrics don’t mix. Keep away from any fitting that water is reaching and have an electrician check it. Then the source needs tracing. In Northolt, as in much of London, water from a roof defect can reach a neighbour’s home as easily as yours: a blocked parapet gutter or slipped slate can let water into the flat below or the house next door. Finding it early keeps the work smaller.
Our price is from £150, including VAT. Packages run from Basic at £150 through Standard at £250 to Premium at £400, including VAT, and we can help you choose.
Why us?
- Photos and a written report every time
- More than 5,000 surveys completed
- CAA-registered drone operator (Flyer ID and Operator ID)
- 98% of customers satisfied
See our cost guide and our case studies.
Common questions in Northolt
Can parking be tricky for a visit in Northolt?
In much of London, parking needs planning: a visitor permit or a bay close to the door helps a lot.
Is Northolt in the area you cover?
Yes, Northolt is one of the places we work. The survey and report are the same in Northolt as anywhere else.
What will the report tell me?
A photo-illustrated written report, covering the condition of the leaking roof, the defects we found and what we recommend. The Standard Survey adds moisture detection and a structural check, and the Premium Survey adds thermal imaging, drone inspection where it applies and structural analysis.
How fast do I get the report?
Each package has its own report time. Basic is within 48 hours, Standard is 24–48 hours and Premium is the same day. Mention any deadline when booking.
How experienced are you?
We have more than 20 years’ experience and have completed over 5,000 surveys across London and the South East.
Is the repair included in the leak investigation?
Our job here is to trace the leak and explain it, not to carry out the repair. With the report, a roofer knows exactly where to look.
Is thermal imaging part of a leak investigation?
Where conditions suit, it can. The best results come after a sunny day, on a dry roof with little wind. Wet insulation holds heat longer than dry, which can show up on the image. We always check what it shows with moisture readings.
What we look for on each type of roof
Chimney stacks
A stack has several possible ways in for rain. We check each one as far as we can safely see, and look for damp on the breast inside.
Parapet and box gutters
A butterfly roof drains to a central valley gutter. Problems there often show in the rooms on the top floor.