West Sussex · London and the South East
Roof Leak Investigation in Keymer
Roof leak investigations in Keymer, with over 20 years’ experience behind it. Every survey ends with a written report and photographs.
- Water that shows only in certain storms
- Damp underlay across a wide area
- Staining around the chimney inside
Roof leak investigations for homes and businesses in Keymer
Moisture readings and thermal imaging are used where they’re useful. Moisture detection confirms where timbers, plaster or insulation are damp. A thermal camera shows patterns of temperature rather than water, so we confirm what it suggests with moisture readings. Thermal imaging is part of the Premium Survey, and moisture detection comes with Standard. Thermal imaging works best after a sunny day, on a dry roof with little wind. If you are worried about leaks below a flat extension roof and wet patches high on an inside wall, we can find out what’s behind it.
Chimney stacks on older houses around places like Keymer can let water in, at the flashings, the pointing or the mortar round the pots. Damp in a chimney breast can have more than one cause, so it is not always obvious where it starts. The stack, its flashings and the loft space beside it are all worth checking.
Findings are set out part by part, from the coverings down to the gutters, each with a short note and a photograph. You will see the good as well as the bad.
- Where
- Keymer (BN6)
- Region
- West Sussex
- Prices
- From £150 inc. VAT
- Report
- Written, with photos, emailed to you
- Survey days
- Weekdays, Saturdays and Sundays
- Cover
- PI and public liability insurance
- Telephone
- 07833 053749
- Page updated
- 27 October 2026
Keymer roofs and the weather
Handmade clay tiles and tile-hung upper walls are typical of older Sussex houses. Horsham stone slab roofs survive on some old Sussex buildings. Different coverings let water in at different points, which shapes where the search starts. Older buildings may be listed or sit in a conservation area. Historic England’s list shows listed buildings, and the council can say whether a street is in a conservation area. In either case, a change of roofing material may need consent.
Anyone responsible for a site like The Windmills Junior School will know that a leak through a large roof is often found some distance from where the water shows inside. If you let a flat or house near Hassocks station, tracing a leak quickly matters when a tenant is living with it.
Keymer is about 2 miles south of Burgess Hill, in West Sussex. We provide roof leak investigations for homes and businesses in Keymer and nearby. Across West Sussex, we cover Keymer. There’s also a page for Brighton.
Surveys in BN6 work the same way as everywhere else we cover. That includes homes and businesses on Flowers Close, The Quadrant and Kymer Gardens and the roads around them. Other places close to Keymer include Hassocks (1 mile west), Ditchling (1 mile east), Clayton (1 mile south-west), Hurst Wickham (1 mile north-west) and Westmeston (2 miles south-east). Larger places within reach include Crawley (13 miles north), Horsham (13 miles north-west), Worthing (14 miles south-west), Haywards Heath (5 miles north), East Grinstead (15 miles north) and Shoreham-by-Sea (8 miles south-west).
Around Keymer
Around Keymer, our work takes us to homes and buildings near The Greyhound Public House and Downlands Community School. The nearest railway station is Hassocks station, about 0.5 miles west of the centre. Other landmarks nearby include The Dene Hospital (3.2 miles north-west) and Clayton Castle (1.2 miles south-west). The countryside around Keymer includes Ditchling Beacon and Bedelands Farm Nature Reserve.
Common roof problems in Keymer
Valleys carry a lot of water. Worn lead, cracked linings or a build-up of leaves and moss can send that water under the coverings. The stain may appear well away from the valley itself.
Problems we come across often include:
- Leaks at a dormer or roof window
- Damp patches next to the stack
- Water that shows only in certain storms
- Ceiling stains that grow after rain
For an older house near a landmark such as St Cosmas and St Damian Church, the leak may come from a chimney, a valley or tired lead rather than the covering itself.
What to check before booking
- How much experience they have with roofs like yours
- Whether any drone flown is registered with the CAA
- What they won’t be able to tell you
- Whether you get a written report with photos
What happens on the day
When we arrive, we start by asking what you’ve noticed and what you’d like to know. After that, we check everything we can see safely. Most surveys take an hour or two for most houses, and more on a big or complicated roof. Being in a smaller place like Keymer doesn’t change how the visit works: we look from the ground, from windows, from the loft and from the roof where it’s safe. It’s useful to show us anything you’ve already noticed.
- You tell us where the water appears, when, and what the weather was doing.
- We examine the damp area and the rooms near it.
- From the loft space, we trace the water’s route where there’s safe access.
- Outside, we check flashings, valleys, chimneys, gutters and flat roof details from every safe vantage point.
- You receive a report with the likely source, photos and recommendations.
How to prepare
- Dig out any old roof reports or invoices
- Leave a clear route to the loft
- Buyers: confirm access with the estate agent or seller
How to book
Most bookings start with a short call: call 07833 053749 or send us an email, and we’ll ask about the building and what you need. You’ll have a price before anything is arranged.
Advice
Common questions in Keymer
Will you come out to Keymer?
Yes. Keymer is within the area we cover, which takes in towns, villages and rural addresses. We work right across London and the South East. Just mention lanes, gates or anything else about the route when booking.
Do you cover Keymer?
Yes, Keymer is one of the places we work. Every survey there gets the same written report with photographs.
Could my leak actually be condensation?
Many apparent leaks turn out to be condensation. A leak usually shows in one area and follows rain, while condensation is often spread out and worse in cold weather. The report explains which it looks like and what to do.
How many surveys have you done?
We have more than 20 years’ experience and have completed over 5,000 surveys across London and South East England.
Can you give me structural calculations?
No. We are experienced roof surveyors, and visible signs such as sagging are noted, but calculations and an engineer’s opinion are outside what we do. The report will say if you need an engineer.
Do you use drones?
Where it helps and it is safe, yes. Whether we can fly on the day depends on the weather and the airspace rules, and we check for restrictions near airports before flying. We’re a CAA-registered drone operator.
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.
What else we do in Keymer
Roof by roof
Valleys
Stains from a valley leak frequently show some distance off. From inside the loft space, we follow the water’s route back.
Parapet and box gutters
Hidden gutters run behind parapets or between roofs. A blocked outlet sends water over the lining and into the building.
What you can safely check yourself
If you have a loft with safe access, take a look inside. Use a torch and stay on the joists or boards, checking for stains, damp wood or chinks of daylight.
Look up at the roof after a storm, from the ground: pieces of tile or slate on the ground, a gap in the ridge or a lifted flashing are all worth noting. Leave anything above ground level to a survey.
Rented homes, blocks and businesses
Letting agents often book on a landlord’s behalf. Access is agreed with the tenant in advance.
Letting agents can arrange access with tenants. We survey on weekdays and at weekends, which helps when tenants work during the week.
Prices for roof leak investigations in Keymer
Every roof is different, so prices are confirmed before you book. This is what makes a difference:
- The size of the roof
- Height and safe access
- The number of roofs, including extensions and garages
- House, block, shop or office
Roof leak investigation starts from £150, including VAT. The final price depends on how big and how high the roof is, access and the package you choose.
What we need to know
To price your survey accurately, we will ask about:
- Where the property is, with the postcode
- Any stains, drips or damp patches you’ve seen indoors
- What kind of property and roof it is
- Why you want a survey: buying, a leak, a storm or new work
To book a survey, ring 07833 053749 or drop 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.