Greater London · London and the South East
Roof leak investigation in Netherne on-the-Hill, Greater London
Tracing where water is getting into your roof for Netherne on-the-Hill and the rest of Greater London. Surveys run seven days a week.
- Water dripping from rafters or underlay
- Staining around the chimney inside
- Staining where a gutter or parapet meets the wall
Roof leak investigations for homes and businesses in Netherne on-the-Hill
Some ‘leaks’ aren’t leaks at all. In a badly ventilated roof space, condensation can form under the roof and drip, leaving marks that look just like rainwater. Telling the two apart matters, because they need very different work. The pattern of the damp, the ventilation and the timing all help us decide. If you are worried about drips in the loft during heavy rain and staining around the chimney inside, we can find out what’s behind it, on chimney stacks, the roof space and rooflights and dormers alike.
In converted houses and blocks across London, water from a roof can run a long way before it shows on a ceiling, sometimes in a different flat from the one below the defect. That makes the source hard to pin down, and finding it matters for whoever has to deal with it. We look at what we are given access to in Netherne on-the-Hill, inside and out. Let us know when the water shows, and in what kind of weather.
Nothing in the report is left vague: where something needs attention, it says so plainly, and where it can wait, that’s said too.
- Where
- Netherne on-the-Hill (CR5)
- Region
- Greater London
- Prices
- From £150 inc. VAT
- Reports
- Written, with photos, emailed to you
- Survey days
- Monday to Sunday, daytime
- Cover
- PI and public liability insurance
- Call
- 07833 053749
- Updated
- 27 October 2026
Before and after the survey
Small things make a difference, both for the survey and for the roof itself. Some pointers:
- Mention any plumbing above the damp area
- Make sure the loft is accessible
- Mention earlier attempts to fix the leak
- Record whether it leaks in every downpour or only some
Keep the report after the work is done. If the leak returns, it’s a useful record of what was found.
Have flashings and flat roofs looked at every few years. Flashings, valleys and flat roof details are frequent weak points, and catching wear early keeps water out.
Netherne on-the-Hill roofs and the weather
Outer London has lots of Victorian and Edwardian terraces with slate roofs, but also a great many interwar semis, often with hipped roofs in clay or concrete tiles. Bay roofs, hip ridges and dormers from later loft conversions are the details that set these houses apart. Different coverings let water in at different points, which shapes where the search starts. Before planning roof work on an older home, find out whether it is listed or in a conservation area. Changes that affect a listed building’s special interest need listed building consent, and councils can also use Article 4 directions to control changes in conservation areas.
If you look after a building such as Coulsdon Sixth Form College, water through a big roof can travel a long way before it drips, so the search covers more than the obvious spot. If you live in an older home near Church of St Margaret, lead flashings, valleys and old chimneys are typical places for water to get in.
Netherne on-the-Hill is about 2 miles south of Coulsdon, in Greater London. We visit Netherne on-the-Hill as part of our work across Greater London. Netherne on-the-Hill is one of the towns and villages in Greater London where we work. We also survey roofs in Crawley.
Every address in CR5 is covered for roof leak investigations. Local streets include The Village Square, Rookery Mead and Netherne Lane. Other places close to Netherne on-the-Hill include Hooley (1 mile west), Merstham (2 miles south), Chaldon (2 miles south-east), South Merstham (2 miles south) and Gatton (2 miles south-west). We also work in nearby towns such as London (14 miles north), City of Westminster (15 miles north), Kensington (15 miles north), Brompton (14 miles north), Stockwell (12 miles north) and Orpington (12 miles north-east).
Local landmarks in Netherne on-the-Hill
We work in homes and buildings around Shabden Park, among other places. The closest station to Netherne on-the-Hill is Coulsdon South station, about 1.6 miles north. A little further out are The Belfry (3.8 miles south) and East Surrey Museum (2.9 miles east). Open spaces near Netherne on-the-Hill include South London Downs National Nature Reserve and Colley Hill.
Landlords, agents and block managers in Netherne on-the-Hill
For a freeholder or residents’ company, a roof report is a sound basis for a maintenance plan, putting the urgent items at the top.
Surveys can also be booked by buyers’ agents acting for a client. Reports are emailed, so they’re easy to pass on, photographs included.
Roof by roof
Valleys
Valleys collect water from two roof slopes. Split lead, cracked linings or slipped tiles let water in.
Flat roof upstands and outlets
The upturned edge of a flat roof covering keeps water out at walls. A low or cracked upstand is a common way in.
What else we do in Netherne on-the-Hill
What happens if roof problems are left?
Wet insulation doesn’t insulate well. A slow leak can soak it for months before a stain appears. The sooner the cause is found, the less needs replacing. Behind a London parapet, a blocked gutter can sit full of water without anyone seeing it. By the time a ceiling stains, the timbers underneath may have been wet for a while.
Prices start from £150, with VAT included, for a Basic Survey. The Standard Survey starts from £250 and the Premium Survey from £400, both inc. VAT. You’ll know the exact price before booking.
Why us?
- 98% of customers satisfied
- Over 5,000 surveys carried out
- Package prices that include VAT
- Every finding written up with photos
Read what a roof survey costs or our case studies.
What we’re asked to look at in Netherne on-the-Hill
Every flat roof covering has a working life. Felt often lasts around 15 to 20 years, and as it ages it splits, blisters and opens at the laps. Leaks often start at the edges, upstands and outlets.
Look out for signs like these:
- Condensation that looks like a leak
- Leaks at a dormer or roof window
- Leaks that appear only in driving rain
- Water through the ceiling under a flat roof
For a London address like Netherne on-the-Hill, it is useful to know about controlled parking before the day, along with any off-street space.
Before you book any roof surveyor
- Whether the price includes VAT
- Their insurance cover
- Whether any drone flown is registered with the CAA
- What they won’t be able to tell you
Netherne on-the-Hill questions
Does a conservation area affect roof work in Netherne on-the-Hill?
Start with Historic England’s list for listing and your council for conservation areas. Either can affect what roof work is allowed, so it’s worth checking before planning any.
Do you carry out roof surveys in Netherne on-the-Hill?
Yes. We survey roofs across London and the South East, and Netherne on-the-Hill is part of that. You can call 07833 053749 or send us an email with the address and a few details, and we will talk through which survey suits.
Can you survey a shared roof?
Yes. Shared roofs just need a little more planning. Mention it when you contact us and we’ll plan the survey around it.
How many surveys have you done?
More than 5,000 surveys over 20+ years, across London and South East England.
Can thermal imaging help find my roof leak?
It can, when the conditions are right. 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.
Is this an asbestos survey?
No. Asbestos surveys and testing aren’t part of what we do. If we see materials that could contain asbestos, such as cement roof sheets or soffits on buildings from before 2000, we flag them and suggest a specialist asbestos surveyor checks them before any work.
Do I have to be there for the survey?
If the survey includes the loft or the inside of the building, someone needs to let us in. We’ll talk about access when booking.
How it works
You don’t need to do much on the day. Show us any stains, drips or problem areas you know about, and we’ll take it from there. A typical survey takes between one and two hours at most homes, and longer for a large or complex roof. In converted houses and mansion blocks, the loft hatch is often on a shared landing. If that applies to your building, it helps to agree access with the neighbours or the managing agent first. Everything else is planned around the building, not the postcode.
- We start with your notes and photos of the leak.
- We examine the damp area and the rooms near it.
- From the loft space, we trace the water’s route where there is safe access.
- Outside, we check flashings, valleys, chimneys, gutters and flat roof details from each safe vantage point.
- We email a written report showing where the water most likely gets in.
Preparing for the visit
- Have any questions written down, so nothing gets missed
- Let us know about parking near the property
- Show us where any leaks or stains appear
Arrange a survey
To book a survey, call 07833 053749 or send us an email with the address and what you’d like to know about the roof. You’ll know the price before anything is booked.