Flat Roof Repairs · South Norwood SE25
Flat Roof Repairs In South Norwood
Is the drip in your South Norwood kitchen coming from your flat roof, or the one next door?
Felt, rubber and fibreglass repairs to rear extensions, dormers and side returns behind SE25's railway terraces
From the street, the houses along Portland Road and through Selhurst look like rows of slate and chimney pots. Go round the back and it is a different picture. Behind most of these railway-era terraces you will find a back addition under its own small roof, and very often a flat roof tacked on later: a kitchen pushed out into the side return, a bathroom over it, a dormer on the loft. Each one was added by a different owner, decades apart, and many of them butt straight up against next door's. So when water appears on your kitchen ceiling, we start by asking where it actually came in. On a terrace in SE25, it is not always your roof.
Flat Roof Repairs quote in South Norwood
Four details and somebody will come and look at it. There is no charge for the visit, no obligation afterwards, and if the answer is that your roof is fine, that is what you will be told.
The people behind it
Two brothers on one terrace roof
A flat roof at the back of a South Norwood terrace can mean a chat with the neighbours as well as you. Roof Repairs Croydon is a family firm run by John and Mark, two brothers who have always worked side by side and never fallen out over it.
They often look over a quote together and run the job between them, so either one can answer when you ring. If John is up a ladder, Mark will usually pick up and already know where your extension roof stands.
1,000+
Roofs put right
10 year
Written workmanship guarantee
£0
To have somebody come and look
Repair first
Replacement is the last resort
What a failing flat roof looks like behind a South Norwood terrace
Most of these signs can be spotted from a back bedroom window. Each one points somewhere different, and on a terrace some of them point next door.
A stain along the line of the party wall, not in the middle of the ceiling
The edge where your flat roof meets the neighbour's, or meets the boundary wall, has opened up. Two roofs laid at different times rarely join well, and the gap between them collects water from both.
Water in the corner where the extension meets the back addition
An internal corner on a flat roof is the hardest detail to keep watertight. On these terraces it often has two old walls, two roof levels and a downpipe all meeting at one point.
Moss and silt building up in one low spot
The roof is draining towards a corner instead of the outlet. That can mean a sagging deck, or an outlet that drops into a gutter shared with next door and blocked at their end.
Cracks across the felt on a dormer cheek or top
Older felt goes brittle on a dormer that bakes in summer and freezes in winter. Once it crazes, every shower finds its way into the cracks.
How we handle flat roofs on SE25 terraces
We check both sides of the boundary
From your roof or a ladder we can usually see the neighbour's flat roof too. If the fault is theirs, you get photos showing it, so you are not paying to fix the wrong roof.
Joins to next door made properly
Where your covering meets a neighbour's, we finish it with an upstand or a proper termination on your side of the line, rather than smearing mastic over both.
Access through a narrow house planned in advance
Mid-terrace work means materials come through the hall or over a back wall. We agree the route on the survey so nothing surprises you on the day.
The wall junction gets lead
Where a flat roof meets the old brick of the back addition, we cut a chase and dress lead into it. A cement fillet against Victorian brick will crack again within a few winters.
A straight answer on repair or re-cover
If the felt is sound apart from one bad joint, we fix the joint. If the deck underneath has gone soft, we tell you that and price it before work begins.
Ten years in writing
Our workmanship guarantee runs for ten years and comes as a written document once the job is signed off.
Why flat roofs in South Norwood so often leak because of the neighbours
These terraces were built in long runs, so every back garden is a narrow strip with a wall on each side. When owners extended into the side return or added a dormer, they built right up to that wall, and often the house next door did the same a few years later. You end up with two flat roofs side by side, laid by different firms, joined with whatever was to hand. Water does not care where the boundary runs. It finds the lowest point and the weakest seam, wherever they are.
The drainage is shared too. A flat roof at the back of a South Norwood terrace often empties into a gutter or a hopper that also takes water from the neighbour's back addition. If their end blocks, your roof floods back. It also works the other way, and a leak in your house can be quietly soaking the wall of the house beside you. That is why we look along the run before we quote. Fixing only your half of a shared problem tends to mean another call next winter.
"On the back of South Norwood terraces we often find the leak is at the join between two neighbours' flat roofs rather than in either covering."
From flat roof repairs enquiries in South Norwood handled by Roof Repairs Croydon
How a South Norwood flat roof repair goes
Tell us where the water shows
A photo of the ceiling and one of the roof from an upstairs window narrows it down. On a terrace, it also tells us whether the neighbour's roof needs a look.
Free survey of your roof and its neighbours
We go up, test the deck underfoot, check the wall junctions and the outlet, and look across the boundary to see what next door's side is doing.
Photos and a plain explanation
You see what we saw. If the cause is on the adjoining roof, the photos are something you can show your neighbour.
A written price
Itemised, with any deck boards, lead or outlet work shown separately. If the job involves a shared wall or gutter, we say so on the quote.
The repair
Materials carried through or over the back, the faulty area stripped back to sound edges, deck repaired where needed, and the new covering and lead put on.
Hosed, checked, signed off
We run water across the finished roof to watch it reach the outlet, clear up, and hand over photos and the guarantee.
The 10 year guarantee, and why it is safe to offer
Promising a roof will stay dry is easy. What counts is what happens if it does not. Work booked through Roof Repairs Croydon carries a 10 year workmanship guarantee, on paper, handed to you on the day and written in language you can actually read. The slates, tiles, lead, mortar, membranes and rainwater goods carry their own manufacturer cover on top of that. It varies by product, so you get told which cover applies to your job rather than one headline number that would be wrong on most of them.
Here is the reason a guarantee like that is not a risk. Repairs come back for one reason above all others: the fault was never found in the first place. Somebody went up, saw a stain on the ceiling below, mended whatever looked worst directly above it, and left. Water does not cooperate with that approach. It lands on a slate, runs under it, drops onto a rafter and travels along the rafter before it finds anywhere to fall. On a wide hipped roof in Sanderstead or Shirley that can be five metres from where it came in.
Find the entry point and the repair holds for years. Miss it and no amount of guarantee wording helps anybody. That is why the survey happens before the price, and it is why, if the same water finds its way back into your house inside the guarantee period, putting it right costs you nothing.
10 year
Workmanship guarantee
1,000+
Roofs put right
Covered
Public liability insurance
Per product
Maker's own warranty
Before you accept a flat roof quote in SE25
Did they look at the adjoining roof?
On a terrace, a roofer who only looks at your side may be quoting to fix a leak that starts on the next house. Ask what they saw over the boundary.
How do they plan to finish at the party wall?
The quote should explain how the new covering will stop at the boundary. Vague wording here usually means mastic, and mastic does not last.
Where will the water go?
Ask which outlet the roof drains to and who else uses it. A new roof draining into a blocked shared hopper will leak just as the old one did.
Patch the problem or re-cover the roof?
On a small terrace extension the choice usually comes down to how much of the roof is still sound. Here is how the two compare.
| Comparison point | Targeted repair | Full re-cover |
|---|---|---|
| Best for | One failed seam or junction | Felt cracked or blistered all over |
| Deck | Left as it is if firm | Inspected and soft boards replaced |
| Party wall edge | Resealed on your side | Rebuilt with a new upstand |
| Time on site | Usually under a day | One to three days |
| Cost | Lower | Higher, but resets the clock |
| Next door affected? | Rarely | Sometimes, if the edge is shared |
Damp on the chimney breast as well?
On these terraces a wet patch upstairs near the stack is a different problem with its own shared-wall questions. Our page on chimney repairs in South Norwood covers what happens when a stack is shared with next door.
What a flat roof repair costs in South Norwood
The roofs here are mostly small, so the covering itself is seldom the big number. Access, the condition of the deck and how the edges meet the neighbours do more to move the price.
Mid-terrace access around Portland Road and Selhurst
With no side passage on most of these railway terraces, materials and waste go through the house or over a back wall. That takes longer, and it shows on the quote.
Shared edges in Woodside and near Grangewood Park
Where your flat roof joins a neighbour's, the boundary detail can be more work than the rest of the roof. If the fault is shared, the cost of that part may be split.
The deck underneath
A firm deck means a covering job. Boards gone soft from a slow leak have to come out first, and we price that from what we feel underfoot on the survey.
Flat Roof Repairs in South Norwood: questions
Do I need permission to re-cover a flat roof in South Norwood?
Croydon Council is the planning authority. Re-covering a flat roof like for like does not normally need planning permission. The South Norwood conservation area mainly controls what is seen from the street, such as the slate on front slopes, so a rear extension roof replaced in the same way is rarely an issue. If you plan to change the height, the material or anything visible from the road inside the conservation area, check with the council first. Building regulations can apply if more than 25% of a roof is being renewed, mainly because insulation has to be brought up to standard.
Why does my South Norwood extension roof keep leaking at the wall it shares with next door?
Because that edge is where two roofs, two owners and usually two different builders meet. Often the covering was simply lapped onto the neighbour's or onto the boundary wall with no proper upstand. Both sides then move a little and the join opens. The repair is a correct termination on your side, with lead or a trim, so your roof no longer relies on theirs.
The water seems to come from my neighbour's roof. What can I do?
We can give you photos and a short written note showing where the water gets in. Most neighbours are happy to sort it once they can see the problem. If the repair involves the party wall itself, the Party Wall etc. Act 1996 may require notice to be served. We will tell you if it does.
My flat roof drains into a gutter next door also uses. Is that normal?
On these terraces, very. A shared hopper or gutter between two back additions is common. It works fine while both ends stay clear. When one end blocks, the water backs up onto the roofs. We clear and check the shared run as part of the repair, and can suggest how to split any work on it.
How long will a flat roof repair take on a mid-terrace house?
A repair to a seam or a wall junction is usually done in a day. A full re-cover of a small kitchen extension takes one to three days, depending on the deck and the weather. Access through the house adds a little time, and we protect the hall and floors while materials come through.
What Croydon homeowners say
From roads across the borough, once the ladders had gone.
"Damp patch on our landing ceiling for about three years. Two roofers had been out and both mended the tiles directly above it, and neither made the slightest difference. This chap spent twenty minutes in the loft with a torch before he even went outside, then showed me a photo of a split in the lead in the valley about four metres away from the stain. Fixed it in a morning. Three winters on and nothing."
"Water was coming down the front bedroom wall every time it rained hard and I had convinced myself the roof was finished. It was the gutter. Half of it had dropped so the water was sitting in the middle and going over the front rather than down the pipe. He reset the brackets and cleared the gully, charged me a fraction of what I had budgeted for, and told me the roof itself had years left. Could easily have sold me a new one."
"Ours is in the Chatsworth Road conservation area and I had no idea the rules on roof work here are stricter than the rest of Croydon. He knew straight away, explained what I could and could not do without an application, and did the repair in matching slate. That saved me a very awkward conversation with the council later on."
"Lost most of the ridge tiles along the back in a February gale. Rang in the morning, sheeted the same afternoon so the weather could not get in, came back the following week when it was dry and rebedded the whole ridge properly. Sent me photos of everything for the insurance without me even asking. The bill was exactly what the quote said it would be."
"Gutters had been overflowing under the trees for years and the fascia behind them had gone soft. What I appreciated was that he explained why the timber had rotted rather than just quoting to replace it, and pointed out the new soffits needed vents or I would end up with condensation in the loft instead. Nobody had ever mentioned that to me before."
Had us out to your roof?
Two minutes writing a review does more for a small local firm than any amount of advertising, and it helps the next person in Croydon work out who to ring.
Things to do in South Norwood
When the roof is sorted, here are three places in SE25 worth an afternoon.
Stanley Arts
William Stanley designed and paid for the Stanley Halls on South Norwood Hill in the 1900s. Pevsner called it one of the oddest buildings of its type. It is Grade II listed and now an arts venue with a small theatre.
View on Google Maps - Stanley Arts
South Norwood Country Park
Croydon's sewage farm for about a century became a park in 1989. The 47 hectares near Elmers End are now wet grassland, meadow and a lake, and a local nature reserve popular with birdwatchers.
View on Google Maps - South Norwood Country Park
South Norwood Lake and Grounds
This lake once fed water to the old Croydon Canal. Now it is a park, Croydon Sailing Club races dinghies on it, and it is a short walk from Selhurst and calmer than the country park.
View on Google Maps - South Norwood Lake and GroundsSouth Norwood on the map
South Norwood is about 15 minutes from our base on Penwortham Road. Planning and building control for SE25 sit with Croydon Council.
Areas we cover
We repair flat roofs across Croydon and the towns that border it. Pick a town below to see its page.
Flat Roof Repairs by town
Find out whose flat roof is really leaking
Send us a photo of the ceiling and the roof, or ring during the week or on Saturday. We will look at your roof and the one beside it for free and give you a written price for whatever is actually wrong.