Greater London · London and the South East
Roof leak investigation in Crossness, Greater London
Tracing where water is getting into your roof across Crossness, with drones and thermal imaging where they help. Get in touch for a price.
- Damp on a chimney breast
- Staining where a gutter or parapet meets the wall
- Damp ceilings under a flat roof
How it works
We’ll ask a few questions first, like when any problem began and what work has been done before. Then the inspection itself takes about one to two hours, more where the leak is intermittent or the roof is large. Many London properties are flats or terraces with no side access, so the back of the roof is often seen from upstairs windows, from inside or, where a flight is allowed, from the air. Mention any building rules, key holders or managing agents as you book.
- You pick a Basic, Standard or Premium Survey.
- We agree a date, including weekends.
- We inspect inside and out, starting from the stain.
- Where it is useful and included, we take moisture readings and use thermal imaging.
- The report explains the likely entry point and what needs attention.
How to prepare
- Leave side gates unlocked
- Keep pets in another room
- Mention any parking restrictions on your street
How to book
Surveys can be booked for weekdays, Saturdays or Sundays. To arrange a day that suits you, phone 07833 053749 or email us.
Advice
How a roof leak investigation works in Crossness
On older houses, leaks often 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 each safe vantage point. The findings are recorded with photos. We survey rooflights and dormers, flat roof details and chimney stacks, and people most often book us about wet patches on loft insulation and ceiling stains that grow after rain.
In a London flat, water can travel some way before it shows, sometimes in a different flat from the one below the defect. Tracing it back matters, both for dealing with the cause and for any insurance claim. We check what we are given access to in Crossness, inside and out. Let us know when the water shows, and in what kind of weather.
The report is written in plain words, so you don’t need to be a roofer to follow it. Each point is backed by a photo where possible.
- Where
- Crossness (SE2, SE28, DA18)
- Region
- Greater London
- Cost
- From £150 inc. VAT
- Reports
- A written report with photos, by email
- Survey days
- Weekdays and weekends
- Cover
- Professional indemnity and public liability
- Phone
- 07833 053749
- Last updated
- 27 October 2026
Why get it checked now?
Leaks tend to get worse, not better. Wind lifts loose slates further and gaps widen. An investigation now gives you time to plan the work. Many older London roofs have only old felt under the slates, or no underlay at all, so once the slates or flashings let water past, little stops it reaching ceilings. Left unchecked, water soaks into timber and plaster and the damage spreads.
Bigger, taller and commercial roofs take more time to survey, so the price reflects that. You will know the figure before booking.
Why us?
- Drone and thermal imaging surveys available
- More than 5,000 surveys completed
- Two decades and more of roof surveys
- Prices that include VAT
See how roof surveys are priced or what we found on two real jobs.
Crossness roofs and the weather
With Rainham Hall about 2.8 miles north-east, Crossness sits in an area with a long building history. Older roofs in the wider area can hide decades of patch repairs, so the detail matters, and any change of roofing material on a listed home needs checking with the council first. 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. If your home in Crossness is one of them, bay roofs, hips and later dormers each have their own details. The covering and its details give the first clues when tracing where water is coming from.
If you run a business near Gallions Reach Shopping Park, finding where water is getting in quickly keeps disruption down. For landlords with property near Abbey Wood station, a tenant living with a leak needs the cause found, not just the stain painted over. For an older house near a landmark such as Church of the Cross, leaks on older roofs often start at lead flashings, valleys or around old chimney stacks.
Crossness is about 2 miles north-west of Erith, in Greater London. Crossness is part of the area we cover and the surrounding area as part of our work across London and South East England. Crossness is one of the places in Greater London where we work for roof leak investigations. We also survey roofs in London.
We cover every part of SE2, SE28 and DA18 for roof leak investigations and the streets around it. If you need a roof leak investigation at a property on Kale Road, Haldane Road and Seacourt Road or anywhere close by, we can survey it. Crossness sits on or near the A2016, so getting to you is simple. Neighbouring places we cover for roof leak investigations include Thamesmead (1 mile north-west), Dagenham Dock (1 mile north), Barking Riverside (2 miles north-west), Hornchurch Marshes (2 miles north-east) and Dagenham Green (2 miles north). Within a short drive, we also cover London (10 miles west), City of Westminster (12 miles west), Marylebone (12 miles west), Kensington (14 miles west), St Pancras (11 miles west) and Shoreditch (9 miles west).
Local landmarks in Crossness
In Crossness, that means homes and buildings near Lesnes Abbey Woods, Harris Garrard Academy and Belvedere Working Mens Club pub. Crossness’s nearest station is Abbey Wood station, about 0.8 miles south-west of the centre. Nearby you’ll also find Erith and District Hospital (2.1 miles south-east) and Gallions Reach Shopping Park (2.4 miles west). For a walk, there’s Crossness Nature Reserve.
Tips that help
There’s plenty you can do without going near the roof. What helps most:
- Check whether pipes or tanks run near the stain
- Write down the wind direction and rain when it leaks
- Move stored items away from the hatch
- Stay off ladders and the roof
We email the report to you, with photographs of what we found. It sets out where we believe the water is getting in, how it is travelling and what needs attention. Basic reports come within 48 hours, Standard within 24 to 48 hours and Premium the same day.
Have leaves and moss cleared from gutters, valleys and outlets, particularly in autumn. Blocked outlets on parapet and flat roofs cause many leaks. Use a professional rather than climbing up yourself.
Nearby places to Crossness
Other services in Crossness
Checking the roof from ground level
Inside, the loft is a good place to look, with care. Use a torch and stay on the joists or boards, and look for staining, damp timber or daylight coming through.
A lot can be seen from ground level. With binoculars, look for slipped or missing slates and tiles, gaps along the ridge and leaning chimneys. Never climb onto the roof to look.
Roof by roof
Flat roof upstands and outlets
On a flat roof, a leak can show some distance from the split. Where conditions allow, moisture readings and thermal imaging help narrow it down.
Slate and tile slopes
Ridge and hip tiles can loosen as their mortar cracks. Rain can then run in at the ridge.
When you need someone else
To be straight with you, there are limits to any roof survey:
- A structural engineer’s report
- Leaks that only appear in weather we cannot recreate
- Putting the leak right
Not sure which survey suits your roof? You can ring 07833 053749 or use the contact form and we’ll tell you. What our survey covers.
What we check
- The roof space
- Slate and tile slopes
- Flat roof details
- Valleys and parapet gutters
- Lead flashings
- Chimney stacks
- Rooflights and dormers
Your questions about roof leak investigations in Crossness
How do I find out if my home in Crossness is listed?
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 Crossness?
We do. Every survey there gets the same written report with photographs.
Does this replace a RICS home survey?
No. We’re experienced roof surveyors, and our survey covers the roof rather than the whole building. For the rest of the building, a RICS home survey is a separate job.
What’s the best way to book?
Simply call 07833 053749 or drop us an email with the address. After a few questions, we confirm the price and fix a day.
How fast do I get the report?
Basic reports arrive within 48 hours, Standard reports in 24–48 hours and Premium reports on the same day. All of them come by email.
What do I do with the report?
The report comes by email, and what you do next is up to you: raise it with a seller, send it to an insurer, brief a roofer or share it with a managing agent.
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. Access is agreed with you as you book.