West Sussex · London and the South East
Roof Leak Investigation in Crosspost
An experienced roof surveyor for roof leak investigations in Crosspost. More than 20 years and over 5,000 surveys.
- Staining around the chimney inside
- Drips from nail tips in a cold loft
- Staining where a gutter or parapet meets the wall
How a roof leak investigation works in Crosspost
On a flat roof, water can travel a long way under the covering. Common causes are splits and blisters, tired upstands and outlets that don’t drain. Ponding water makes any weakness worse. We check both the covering and the room underneath to narrow it down. Flat roofs over extensions, garages and dormers are frequent sources of leaks. An ageing felt roof is a frequent culprit. Common reasons to book are water dripping from rafters or underlay and water through the ceiling under a flat roof, on lead flashings, slate and tile slopes and rooflights and dormers.
Roofs in small places like Crosspost often stand in the open, where storms hit ridges, verges and chimneys hardest. Once water gets into older walls, it takes a long time to dry, so it pays to find the cause quickly. A written record also helps if you need to explain it to anyone else.
What you get is a clear record of the leaking roof on the day we saw it. That makes it useful now and a handy reference later.
- Location
- Crosspost (RH17)
- Region
- West Sussex
- Prices
- From £150 inc. VAT
- Your report
- Emailed report with photos and recommendations
- When we survey
- Weekdays and weekends
- Insured
- Professional indemnity and public liability
- Call
- 07833 053749
- Page updated
- 27 October 2026
Tips from our surveys
From years of surveys, a few habits stand out as worth the effort:
- Take dated photos of the leak
- Write down the wind direction and rain when it leaks
- Do not climb onto the roof to look
- Catch drips in a bucket and protect the floor
Once the work is done, hold on to the report. If the leak returns, it is a useful record of what was found, which makes the next step quicker.
Keep gutters, valleys and outlets clear, especially in autumn. Blocked outlets on parapet and flat roofs cause many leaks. Use a professional rather than climbing up yourself.
The survey, step by step
Photographs are taken throughout the visit, so the report shows exactly what we saw. We take close-ups from wherever is safe, including by drone where it is applicable and the weather allows. Most surveys take an hour or two at a typical home, and longer for a large or complex roof. Somewhere like Crosspost needs a little journey planning: let us know about lanes, gates and parking. On the day, we inspect what can be seen safely, inside and out.
- We help you choose the package that suits the leak.
- A visit is booked for a weekday, Saturday or Sunday.
- We inspect inside and out, starting from the stain.
- Moisture detection and thermal imaging are used where your package includes them and they help.
- You get photos, the likely cause and clear recommendations.
Before we arrive
- For flats, check roof access has been agreed
- Tell us about parking before the day
- Check the loft hatch can be reached
Booking a survey
Every survey is priced before it’s booked, so you know the cost up front. Our price is from £150, including VAT. For a price for your roof, call 07833 053749 or email us.
Related advice
Nearby places to Crosspost
Other services in Crosspost
How the survey changes by roof type
Parapet and box gutters
Some older terraces have a butterfly roof with a valley gutter in the middle. If that gutter or its outlet fails, water can come through the top-floor ceiling.
Flat roof upstands and outlets
Each flat roof relies on its outlets to drain. When one blocks, water ponds and finds any weak spot. We check outlets and the covering around them.
Landlords, agents and block managers in Crosspost
Shared roofs need a little more planning: we need access agreed with the freeholder or managing agent. Tell us about it when you book and we will plan the visit with that in mind.
Any of our surveys can be booked by landlords, agents and building managers in Crosspost. For a price for a let property or a block, phone 07833 053749 or send us an email.
Crosspost roofs and the weather
With Ockenden Manor about 3.1 miles north-east, Crosspost sits in an area with a long building history. On older houses around here, roofs frequently carry the marks of earlier repairs, from replaced slates to new lead. 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.
If you live in an older home near St Mary Magdalene's Church, old mortar, worn lead and slipped slates are the usual suspects when water gets in. If you look after a building such as Bolney CofE Primary School, tracing a leak on a big roof starts with where the water appears and works back. For landlords with property near Wivelsfield station, finding the cause of a leak fast keeps a tenant’s home dry and the work focused.
Crosspost is about 4 miles north-west of Burgess Hill, in West Sussex. We carry out roof leak investigations in Crosspost for houses, flats, blocks and commercial buildings, with a written report and photographs every time. We cover towns and villages across West Sussex, from the larger towns to small villages. For surveys nearby, see our Crawley page.
Surveys in RH17 work the same way as everywhere else we cover. We offer roof leak investigations to properties on Cowfold Road and Chapel Road and the roads around them. We also cover the places around Crosspost: Bolney (1 mile north-east), Twineham Green (1 mile south), Twineham (2 miles south), Wineham (2 miles south-west) and Kent Street (2 miles west). Within a short drive, we also cover Crawley (9 miles north), Horsham (7 miles north-west), Worthing (14 miles south-west), Haywards Heath (5 miles east), Burgess Hill (4 miles south-east) and East Grinstead (13 miles north-east).
Near you in Crosspost
The closest station to Crosspost is Wivelsfield station, roughly 4.2 miles east of the centre. Nearby you’ll also find The Dene Hospital (2.5 miles south-east) and Cuckfield Museum (3.2 miles north-east). The countryside around Crosspost includes Blunts Wood and Paiges Meadow.
What affects the price in Crosspost
We confirm the exact price before you book. These are the things that affect it:
- The package you choose: Basic, Standard or Premium
- Whether thermal imaging or a drone is needed
- How complicated the roof is, with its valleys, chimneys and parapets
- House, block, shop or office
A small, low roof with good viewpoints takes less time than a tall, complicated one, and the package matters as well. We will give you the figure before anything is booked.
Getting in touch
You do not need to know any roofing terms. Just let us know:
- Anything about access we should know
- What kind of property and roof it is
- When you need the report by
- Photos of the roof, taken safely from ground level or a window
Unsure which package suits your roof? It is easiest to ring 07833 053749 or drop us an email and describe the roof and why you want it surveyed. We will explain the options and the price.
Your questions about roof leak investigations in Crosspost
Do you cover smaller places like Crosspost?
Yes, Crosspost is on our map. A small place gets exactly the same survey as a big one.
Is Crosspost in the area you cover?
We do. The survey and report are the same in Crosspost as anywhere else, and visits run on weekdays and weekends.
Does the report include photos?
Yes. The report includes photographs of what we found.
Can you always find the source?
We can’t promise to find every leak on one visit. Many leave clear signs, but some only appear in certain weather. We report what we found and the likeliest sources.
Is it the same as a RICS Level 2 or Level 3 survey?
No. We look at the roof, not the whole building, so it’s not a RICS Level 2 or Level 3 survey. It can sit alongside a RICS survey if you want both.
Do I need to be at home?
Someone needs to let us in if we are looking inside or in the loft. We’ll talk about access as you book.
How should I prepare for the leak investigation?
Keep a note of when it leaks, and take photos. Move stored items away from the loft hatch. If water is near any fittings, have an electrician check them.
What you can safely check yourself
Keep a simple record: dates of leaks, photos from ground level and any work done on the roof. Send it with your enquiry.
What you can’t do safely is get up close. Slates, tiles, flat roofs and rooflights can give way, and a fall can be serious. That part is for a survey.