Flat Roof Repairs · Kenley CR8
Flat Roof Repairs In Kenley
Is the flat link between your Kenley house and its extension holding water?
Repairs and re-covering for flat sections, extensions and garages on Kenley's high, frosty plateau
Kenley houses tend to have grown. A kitchen added down the slope off Hayes Lane, a garage pushed in beside the house on Kenley Lane, a two-storey side addition along one of the roads off Godstone Road. Somewhere in that sequence a builder needed to join two roofs that did not line up, and the easy answer was a short run of flat roof. Those flat sections now take more weather than almost any roof in the borough. Rain off two pitches lands on them. Frost works on them roughly 35 nights a year, going by the Met Office figures for Kenley Airfield. We check the deck, the falls and every upstand before suggesting anything.
Flat Roof Repairs quote in Kenley
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, one plan for a tricky roof
A Kenley flat roof squeezed between two other roof levels is the sort of job where a second opinion is useful before the price is fixed. At Roof Repairs Croydon, the second opinion is built in. The firm is run by brothers John and Mark, who tend to work quotes out together.
They think along the same lines, so it is a quick conversation rather than an argument. They say, with a grin, that it makes them twice as good as an ordinary roofing firm.
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 goes wrong on a Kenley flat roof, and why
Height and frost change how a flat roof fails. These are the symptoms we would expect to see here, and the cause usually behind them.
Hairline cracks in the felt that open after a cold snap
Freeze-thaw. Water sits in tiny surface crazing, freezes, expands and widens the crack. Older bitumen felt goes brittle with age, so it loses the flexibility to cope.
Damp exactly where the flat link meets the taller wall
The upstand is too short or the flashing above it has cracked. Driven rain running down the higher wall gets behind the covering at that line.
A puddle that turns to ice in winter
Not enough fall to the outlet. Ice on a flat roof is a strong hint that water is sitting there all year, and the covering under it is ageing fastest.
Ceiling stain on a lower floor, nowhere near the flat roof
On a split-level house, water can travel along a joist or wall plate before it shows. The entry point may be one level up from the damp.
How we handle flat roofs on Kenley's high ground
Every level walked
We go round the whole plot, including the parts you cannot see from the road, so the flat roof is judged as part of the house rather than on its own.
Coverings that cope with frost
EPDM rubber and GRP keep their flexibility at low temperatures far better than old two-layer felt. We explain which suits your roof.
Upstands taken high enough
At least 150mm up the abutting wall, with lead or a proper cover flashing over the top. A short upstand is the most common weakness on Kenley links.
Outlets sized for two roofs
If your flat section collects water off two pitches, the outlet has to cope with it. We check, and enlarge or add one where needed.
Access across the slope planned
On plots that drop away from the road we measure up for a tower or scaffold at the visit. It goes on the quote as a separate line.
Guaranteed for ten years
Our written workmanship guarantee is handed over once the roof is finished and checked.
Why Kenley is hard on flat roofs
The RAF built an airfield up here because the ground is high and open. That same height brings the weather: the long-term average at Kenley Airfield is around 847mm of rain a year over roughly 130 rain days, which is noticeably wetter than the low end of south London. A flat roof up here is wet more often and for longer, and it freezes more often too.
Then add the shape of the houses. Many Kenley plots are steep, so extensions were stepped down the hill and joined to the main house wherever they would fit. That leaves flat roofs boxed in between walls on two or three sides, with long abutments to seal and a single outlet doing all the work. When one of those fails, it is rarely the middle of the roof. It is the edges, the corners and the drainage.
"On split-level Kenley houses, the flat link between two roof levels is usually the first thing to fail, and it often gets blamed on the pitched roof above it."
From flat roof repairs enquiries in Kenley handled by Roof Repairs Croydon
A Kenley flat roof repair, step by step
Tell us what the weather was doing
If the leak only shows up in a hard south-westerly, or after a frost, that narrows down where to look before we even arrive.
We inspect every roof level
The free survey covers the flat section, the walls around it, the outlet and the inside. On split-level houses we follow the water back from where it shows.
The deck is tested
We check for soft boards and trapped moisture. A wet deck means a re-cover. A sound one may only need a local repair.
Itemised written quote
Covering, upstands, outlets, any deck replacement and access all listed separately. Nothing hidden in a single figure.
Repair or re-cover
Failed material is stripped, wet boards replaced, falls corrected with firrings where needed, then the new covering is taken up the walls and sealed under flashings.
Drainage tested before we leave
Water is run to the outlet to check it clears. You get photos of the finished roof and the ten year 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 agree a flat roof quote in Kenley
Is the covering suitable for frost?
Cheap felt cracks in cold weather. Ask what the quote uses and how it behaves after a winter on high ground.
How high do the upstands go?
Get a figure. On a flat link boxed in by walls, a short upstand will let driven rain straight back in.
Does the price include access?
On a sloping Kenley plot, scaffold or a tower can be a big part of the cost. Make sure it is in the quote, not added afterwards.
Old felt or a modern membrane for Kenley?
On a sheltered garage, felt is often fine. On a flat link that gets frost, run-off from two roofs and wind across the plateau, a modern membrane is worth weighing up.
| Comparison point | EPDM or GRP | Two-layer felt |
|---|---|---|
| Behaviour in frost | Stays flexible | Goes brittle as it ages |
| Seams | Few or none on small roofs | Lapped joints across the roof |
| Upstand detailing | Can be formed in one piece | Built up in layers |
| Hot works | None needed | Usually torched on |
| Up-front cost | Higher | Lower |
| Expected life | Longer, if laid well | Shorter on exposed sites |
Check the stack while the access is up
Many Kenley houses have a chimney sitting close to the flat link or the extension wall, and a failing stack can drip into the same corner. If that sounds familiar, see our page on chimney repairs in Kenley. One scaffold can cover both jobs.
Flat roof repair costs in Kenley
On the hill, the price often depends more on access and how the roof is boxed in than on the size of the flat section itself.
Steep plots off Hayes Lane and Kenley Lane
Where the garden falls away from the road, getting materials down and scaffold up from the low side adds time. We measure this at the survey.
Number of abutments
A flat roof walled in on three sides has three upstands and three flashings to make good. That is more labour than an open garage roof of the same size.
Deck condition
Frost and years of ponding often soften the boards. Replacing some of the deck is a common extra on older Kenley extensions.
Flat Roof Repairs in Kenley: questions
Do I need planning permission to replace a flat roof in Kenley?
Normally no. Kenley is in the London Borough of Croydon, and re-covering a flat roof like for like does not need an application. The Article 4 directions on Kenley Aerodrome, Kenley Lane and Hawkhirst Road remove rights over gates, fences, walls and accesses, not roofs. Inside the aerodrome conservation area, a change that alters how a roof looks is worth raising with Croydon Council first. If more than a quarter of the roof is renewed, building regulations may require insulation upgrades.
Why does frost damage flat roofs in Kenley so much?
Kenley gets around 35 nights of air frost a year on Met Office averages. Water in small cracks, or sitting in a puddle, freezes and expands, then thaws and soaks deeper. Old felt is too stiff to cope. The fix is a covering that stays flexible and a fall that stops water sitting there in the first place.
My Kenley extension roof is boxed in by walls. Is that a problem?
It makes the edges more important. Every wall needs an upstand and a flashing, and wind-driven rain runs down those walls onto the roof. If the upstands are low or the flashings have cracked, that is where the water gets in. We check each one.
Can you repair just part of a flat roof?
Yes, if the deck is sound and the rest of the covering has life left. A failed upstand or a split near the outlet can often be repaired on its own. If the boards are soft or the covering is cracking all over, a re-cover is the better use of your money.
How long does a flat roof re-cover take?
A small flat link or garage roof is often one to two days. Larger roofs, deck replacement or difficult access add time. Some membranes need dry, mild weather to bond, which can matter on the hill in winter.
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 Kenley
Kenley has more open space than most of the borough. Three places to start.
Kenley Airfield
A Second World War fighter airfield that is still remarkably complete, with surviving fighter pens. One pen holds the RAF Association memorial, and gliders still fly from the field.
View on Google Maps - Kenley Airfield
Kenley Common
About 138 acres of grassland and woods around the airfield, managed by the City of London Corporation, with a waymarked heritage trail past the wartime remains.
View on Google Maps - Kenley Common
Riddlesdown Common
City of London downland above the Godstone Road, with an old chalk quarry worked until 1964 and a grassy path along the top looking north to central London.
View on Google Maps - Riddlesdown CommonKenley on the map
Kenley is roughly ten minutes from our base in South Croydon. It is inside the London Borough of Croydon for planning and building control.
Areas we cover
Kenley is one of sixteen towns we cover around Croydon. Pick yours below to see what we do there.
Flat Roof Repairs by town
Problem with a flat roof in Kenley?
Tell us where the water shows up and what the weather was like. We will look at every level of the roof for free and put the cause and a fixed price in writing.