Greater London · London and the South East
Roof leak investigation in Keston, Greater London
Tracing where water is getting into your roof for Keston, from an experienced roof surveyor. You get a clear written report with photographs.
- Ceiling stains that grow after rain
- Water through the ceiling under a flat roof
- Damp on a chimney breast
Checking the roof from the ground
Watch the gutters in a downpour, from a window or the ground. Water spilling over the edge can be a sign of a blockage or a gutter that has dropped.
Look up at the roof after a storm, from ground level: pieces of tile or slate on the ground, a gap in the ridge or a lifted flashing are all worth noting. Do not go up yourself.
Roof leak investigation in Keston: what you get
Older homes have more places for water to get in. Worn lead, tired valley linings and blocked parapet outlets are frequent causes. If your home has a butterfly roof, the central valley gutter is a common culprit in heavy rain. We check parapets, valleys and flashings from every safe viewpoint. The findings are recorded with photos. We survey chimney stacks, flat roof details and rooflights and dormers, and the problems we’re asked to look at most are condensation that looks like a leak and water marks that spread in wet weather.
Water getting into a London home often comes from a detail you cannot see from the street: 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 Keston, those are among the first places to look. A hidden gutter that overflows can send water a long way before it shows.
With the Standard Survey, you also get moisture detection, a structural check and a follow-up consultation. The Premium Survey goes further, with thermal imaging, drone inspection where applicable, structural analysis and an in-person consultation.
- Where
- Keston (BR2)
- Region
- Greater London
- Price
- From £150 inc. VAT
- Reports
- Emailed report with photos and recommendations
- Appointments
- Weekdays, Saturdays and Sundays
- Insurance
- PI and public liability insurance
- Call
- 07833 053749
- Page updated
- 27 October 2026
Practical tips
Most of what helps is simple and safe from the ground. Our suggestions:
- Keep a photo record of the damp patch
- Make sure the loft is accessible
- Leave roof access to professionals
- Mention earlier attempts to fix the leak
If there are several possible sources, we list them in order of likelihood. Recommendations are prioritised by urgency where relevant.
Have leaves and moss cleared from gutters, valleys and outlets, especially in autumn. Many leaks start with a blocked outlet. Leave the clearing to someone with the right equipment.
FAQs for Keston
Does a conservation area affect roof work in Keston?
Your council is the best source, with Historic England’s list for listed buildings. Both listing and conservation areas can limit changes of roofing material, and councils can also use Article 4 directions.
Do you cover Keston?
Yes, Keston is within the area we cover. We survey roofs across London and South East England. Just call 07833 053749 or send us an email and let us know about the property, and we’ll talk through which survey suits.
What happens after the survey?
You will get the report by email, with photos and clear recommendations. With Standard there’s a follow-up consultation; with Premium, an in-person consultation.
Can you survey a shared roof?
Yes, once whoever controls the roof agrees access. On a shared roof we can only inspect the parts we’re allowed to reach, and the report makes that clear.
What should I do before you arrive?
Keep a note of when it leaks, and take photos. Clear access to the loft. Keep away from any light or socket that water is reaching.
Do I need to be at home?
That depends on the survey. For inside areas and the roof space, someone has to give us access; we will agree the details as you book.
How long will you be at the property?
Allow about 1–2 hours at most homes, and longer for a large or complex roof. We will give you an idea of timing when booking.
What happens on the day
The visit normally starts outside and finishes in the loft: first the slopes, edges and gutters from every safe viewpoint, then the roof space where it can be reached. All told, expect roughly 1–2 hours, more where the leak is intermittent or the roof is large. In converted houses and mansion blocks, the loft hatch is often on a shared landing. Where that is the case, access needs agreeing with whoever controls that landing. Otherwise, the visit in Keston runs like any other.
- We help you choose the package that suits the leak.
- We agree a date, including weekends.
- 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
- Have keys ready for side gates, garages or roof access doors
- Buyers: confirm access with the estate agent or seller
- Keep pets in another room
Book a survey
Booking is simple: just phone 07833 053749 or email us, let us know about the property and we’ll explain which survey suits. The price is agreed up front.
Related advice
Places near Keston
What else we do in Keston
Why get it checked now?
A small drip today can be a bigger leak after the next storm. Each storm can open a gap a little more. Tracing it now lets you plan the work rather than react to it. Blocked gutters and hoppers on London houses overflow and soak brickwork, which can lead to damp inside. A small blockage left for a few winters becomes a damp problem.
Prices start from £150, including VAT. Basic starts from £150, Standard from £250 and Premium from £400, VAT included, and we’ll tell you which fits.
What you get with us
- PI and public liability insurance
- More than 5,000 surveys completed
- Clear package prices, with VAT included
- More than 20 years surveying roofs
Take a look at what a roof survey costs or our case studies.
Keston roofs and the weather
Historic houses such as Down House, about 2.2 miles south-east, show how far back building in the area around Keston goes. On older houses around here, roofs frequently carry the marks of earlier repairs, from replaced slates to new lead, and the council can say whether a home is in a conservation area. Outer London has lots of Victorian and Edwardian terraces with slate roofs, but also a great many interwar semis, frequently with hipped roofs in clay or concrete tiles. Hips, bay roofs and later loft conversions are typical of those semis, if your home is one of them. Different coverings let water in at different points, which shapes where the search starts.
Living close to South Park is pleasant, but mature trees mean leaves in gutters and valleys each autumn, so outlets and downpipes are worth watching. For landlords with property near Hayes (Kent) station, a clear finding on where water gets in helps you brief a roofer right away. For site and facilities teams at buildings such as Keston Church of England Primary School, on a building that size, finding the source of a drip means looking well beyond the stain.
Keston is about 3 miles south of Bromley, in Greater London. We survey roofs in Keston and the rest of Greater London, as part of our work across London and South East England. Keston is one of the places in Greater London where we work. Our London page covers surveys nearby.
We work across BR2 for roof leak investigations and the streets around it. We cover properties on Church Road, Greys Park Close and Heathfield Road and the roads around them. Other places close to Keston include Nash (1 mile west), Farthing Street (1 mile south-east), Locksbottom (1 mile north-east), Leaves Green (2 miles south) and Hayes (2 miles north-west). Further out, we also cover London (11 miles north-west), City of Westminster (13 miles north-west), Marylebone (13 miles north-west), Kensington (14 miles north-west), St Pancras (13 miles north-west) and Shoreditch (12 miles north).
What’s near Keston
In Keston, that means homes and buildings near South Park, Ravens Wood School and The Greyhound pub. For rail, the closest station is Hayes (Kent) station, about 1.5 miles north-west of the centre. Well-known places in the area include Princess Royal University Hospital (1.1 miles east) and Bethlem Museum of the Mind (1.5 miles north). The countryside around Keston includes West Kent Golf Course nature reserve and Summer Hill.
How the survey changes by roof type
Slate and tile slopes
‘Nail fatigue’ is a common cause of slipped slates. Even a single gap can let water in.
Valleys
A valley leak can appear well away from the valley inside. From inside the roof space, we follow the water’s route back.
What affects the cost of roof leak investigations
The price reflects the time and kit the roof needs. That comes down to:
- Which survey package you book
- Features like valleys, chimneys, dormers and parapets
- The use of thermal imaging or a drone
- How tall the building is and how easy the roof is to see
All our prices include VAT. Our price is from £150, including VAT. We confirm the exact price before booking.
Booking your survey
If you can, have these to hand when you contact us:
- When you need the report by
- Whether there’s a loft hatch, a shared roof or tricky access
- Where water is showing inside, if it is
- Pictures of the roof from a safe spot, if you have them
Unsure which package suits your roof? The easiest way is to call 07833 053749 or use the contact form and describe the roof and what’s worrying you. We will talk you through the options and what they cost.