West Sussex · London and the South East
Roof Leak Investigation in Horsham
Tracing where water is getting into your roof for Horsham, from an experienced roof surveyor. Every survey comes with a written report and photographs.
- Ceiling stains that grow after rain
- Leaks that appear only in driving rain
- Damp underlay across a wide area
Roof leak investigation in Horsham
On older houses, leaks frequently start at lead work and hidden gutters. Lead flashings crack or lift, valley linings wear and parapet gutters overflow when outlets block. 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. Our report shows what we found, with photos. Typical surveys look at leaks that appear only in driving rain and condensation that looks like a leak, across rooflights and dormers, chimney stacks and the roof space.
In a place like Horsham, a good many buildings have flat roofs, from shops and offices to blocks of flats and extensions. On a flat roof, water can get in at a split or an upstand and run under the covering before it shows. Finding the entry point takes patience as well as moisture readings. The usual signs are ponding, blisters and splits in the covering.
The report records the leaking roof as we found it on the day. It is useful right away, and a good reference for later, like when you want to compare after future work.
- Place
- Horsham (RH12, RH13, RH20, BN44)
- Region
- West Sussex
- Price
- From £150 inc. VAT
- Report
- Emailed report with photos and recommendations
- When we survey
- Monday to Sunday, daytime
- Insurance
- Professional indemnity and public liability
- Phone
- 07833 053749
- Page updated
- 27 October 2026
Do you need a roof leak investigation in Horsham?
Slipped or missing slates and tiles let rain reach the underlay. Old bitumen felt may cope for a while, but it tears and sags with age, while some very old roofs have nothing under the coverings. Corroded nails, known as ‘nail fatigue’, are a frequent cause on slate roofs.
People typically book a survey after spotting something like this:
- Leaks at a dormer or roof window
- A leak that comes and goes with the weather
- Water through the ceiling under a flat roof
- Staining where a gutter or parapet meets the wall
For landlords with property near Horsham station, a tenant living with a leak needs the cause found, not just the stain painted over.
Before you book any roof surveyor
- What they won’t be able to tell you
- Whether VAT is added on top
- Are they insured for the work?
- Their drone registration, if they fly one
Towns and villages near Horsham
What else we do in Horsham
Wind, rain and roofs in Horsham
Older houses across Sussex frequently have handmade clay tiles, and many have tile-hanging on their upper walls. Horsham stone slab roofs survive on some old Sussex buildings. The covering and its details give the first clues when tracing where water is coming from. Listing and conservation areas can both shape what roof work is allowed on an older home. The council is the place to check, along with Historic England’s list, before anyone quotes for re-roofing.
The streets around a church such as Hope Chapel are frequently among the oldest in a place, and if you own one of the older houses nearby, old mortar, worn lead and slipped slates are the usual suspects when water gets in. Trees in and around Warnham Park shed leaves that can end up in nearby gutters, and blocked gutters overflow and soak walls.
Horsham is about 31 miles south of London, in West Sussex. Horsham is one of many places we visit across West Sussex, for houses, flats and commercial buildings. Horsham is one of the towns and villages in West Sussex where we work. Crawley is in our area too.
All of RH12, RH13, RH20 and BN44 is covered for roof leak investigations. If you need a roof leak investigation at a property on Station Road, London Road and Market Square or anywhere close by, we can survey it. Horsham is on the A24 and A29, which makes it simple to reach. Nearby, we also carry out roof leak investigations in Tower Hill (1 mile south-west), Broadbridge Heath (2 miles west), Holbrook (2 miles north), Warnham (2 miles north-west) and Southwater (3 miles south). Further out, we also cover Crawley (7 miles north-east), Haywards Heath (11 miles south-east), Burgess Hill (11 miles south-east), East Grinstead (14 miles east), Broadfield (5 miles east) and Storrington (11 miles south-west). Horsham is among the bigger towns we cover in West Sussex.
Near you in Horsham
Locally, jobs take us to homes and businesses close to Millais School, Warnham Park and Kingslea Primary School and the streets around them. There is a railway station in Horsham itself: Horsham station. Other landmarks nearby include Christs Hospital School Museum (2.4 miles south-west) and Horsham Hospital (within half a mile north-west). The countryside around Horsham includes Warnham LNR.
What a survey costs
We confirm the price for your roof before you book. This is what makes a difference:
- Which survey package you book
- House, block, shop or office
- Whether thermal imaging or a drone is needed
- Roof area
There are three survey packages: the Basic Survey from £150, the Standard Survey from £250 and the Premium Survey from £400, with VAT included. What your roof costs depends on its size, access and what you want to find out.
What we need to know
Getting the details right at the start saves time. Please include:
- What made you get in touch
- Any stains, drips or damp patches you’ve seen indoors
- The kind of building and roof involved
- Access details, like a loft hatch or a shared roof
A quick phone call is typically the easiest start: phone 07833 053749 or use the contact form and we’ll ask a few questions about the roof. You’ll have a price before anything is arranged.
Horsham: your questions answered
Do you cover Horsham?
Yes, Horsham is one of the places we work. Every survey there gets the same written report with photos, and visits run on weekdays and weekends.
How should I get ready for a visit in Horsham?
The main thing is access, inside and out, plus somewhere to park in Horsham. Tell us about known leaks or past repairs as well.
I live in a flat. Can you survey the roof?
Yes, once access has been agreed. The roof of a block or converted house is often shared, so we need permission from the freeholder or managing agent. We inspect only the parts we are allowed to reach.
Do you climb onto every roof?
Only when it’s safe. Most of what we need can be seen from safe viewpoints, the loft and, where it applies, a drone.
What does a roof survey cost?
Our price is from £150, including VAT. The final figure depends on the roof and the package you choose, confirmed before anything is booked.
Will you fix the leak as part of this?
A leak investigation finds and reports the likely source. The repair is not part of it. You get a report with photos showing where the water is getting in and what needs attention, which whoever carries out the work can follow.
Why isn’t the leak directly above the stain?
Water follows the easiest path, not the shortest. On a flat roof it can travel under the covering before it shows. Following that route is what our investigation does.
What happens if roof problems are left?
A leak that returns after a repair typically means the real source wasn’t found. We look past the obvious spot and check each likely route. That is often what breaks the cycle. For landlords in Horsham, a roof defect left alone tends to become a tenant’s damp or leak complaint. Finding it early, between tenancies if possible, is simpler than dealing with it mid-let.
Every price we give includes VAT. Our price is from £150, including VAT. We confirm the price for your survey before booking.
What you get with us
- Drone and thermal imaging surveys available
- Customer satisfaction of 98%
- An independent view of the roof
- Two decades and more of roof surveys
Take a look at what a roof survey costs and our case studies.
Tips that help
A survey works best with a little help from you, before and after. Some tips:
- Let us know if there are tanks or pipes in the loft
- Let us know what has already been tried
- Make sure the loft is accessible
- Do not touch fittings that water is reaching
Standard includes a follow-up consultation to talk the findings through, and Premium includes an in-person consultation. It’s a chance to ask about anything in the report.
Don’t block the vents at the eaves. Air movement keeps condensation down, and condensation is a common false alarm. Check insulation doesn’t block airflow at the eaves.
How it works
Where it is relevant and can be reached safely, the roof space is checked as well as the outside. In the loft, the signs we look for are staining, damp, daylight and sagging. The whole visit usually takes between one and two hours, more where the leak is intermittent or the roof is large. If the property is near the centre of Horsham, let us know about car parks or permit rules nearby. Inside, the loft and any room with a stain are the places we will want to see. Outside, we work round the building to find the safe viewpoints.
- We start with your notes and photos of the leak.
- Inside, we look at the stain and the ceiling around 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 viewpoint.
- You receive a report with the likely source, photos and recommendations.
Before we arrive
- For flats, check roof access has been agreed
- Show us where any leaks or stains appear
- Mention any parking restrictions on your street
How to book
Once you know what you need, ring 07833 053749 or drop us an email. We will suggest a package, agree the price and find a date.
Read more
Landlord and commercial surveys in Horsham
For a freeholder or residents’ company, a roof report is a sound basis for a maintenance plan, with the most urgent items set out first.
If you own several properties, you can book surveys for several addresses. To discuss a number of properties, phone 07833 053749 or email us with the addresses.