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Flat Roof Repair Market Harborough
A leaking flat roof gets worse the longer you leave it. One split seam can stain a ceiling and soak the deck beneath in a single wet week. Tate & Sons Roofing handles flat roof repair in Market Harborough and across the Harborough District, from a dripping garage to a failed extension roof. We find where the water gets in, then fix the cause, not just the wet patch you can see.
This page shows you the common faults, how we tell a leak from condensation, and what a repair really costs in 2026. You will see when a patch does the job and when a re-cover makes more sense. Start with a free drone survey and a written price before any work begins — no scaffold just to take a look, and no charge either way. Flat roof repair is one part of the wider service we offer as a roofing contractor across Market Harborough.
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How to Spot Where Your Flat Roof Is Actually Leaking
Water rarely enters where it drips inside. It runs along the deck and joists, then falls through the first gap it finds. That is why chasing the stain never works on its own. A proper survey traces the drip back to its true source before anyone reaches for sealant.
These are the faults we find most often on flat roofs around Market Harborough:
Catch any of these early and a repair usually holds. Leave it, and water reaches the timber deck, the insulation and the ceiling below. At that point a small fix turns into a strip-out. A quick look a couple of times a year saves most homeowners a much larger bill later.
- A split or open seam where two sheets of felt or membrane meet
- Blisters and bubbles lifting the surface away from the deck
- Standing water still sitting two days after the rain stops
- Cracked or lifted flashing where the roof meets a wall
- A failed upstand around a rooflight, pipe or parapet
- Brittle, cracked felt that has simply reached the end of its life
- Blocked outlets pushing water back across the roof
Leak or Condensation? Know Before You Fix Anything
Not every damp patch is a leak. On a cold morning a flat roof can drip from the underside even when it has not rained. Warm, moist air inside the room meets the cold deck and turns to water. That is condensation, and re-sealing the outside will never cure it.
Here is the simple test. A leak tracks with the weather — the mark darkens or spreads within a day or two of heavy rain. Condensation shows up on cold, still mornings regardless of rain, often as thin black mould in corners that wipes off but returns. A leak leaves a sharp brown ring near an outlet, wall or rooflight.
The fix for each is completely different. A leak needs targeted repair; condensation needs better insulation and airflow. Guess wrong and you pay for work that never solves the problem. We check which one you have before quoting a penny, so your money fixes the real fault.
Common Flat Roof Faults and How We Fix Each One
Most flat roof leaks trace back to one of a handful of faults. The table below shows the usual cause, a rough repair cost, and whether a patch tends to hold or the roof wants a full re-cover. These are general market figures, not a quote for your roof.
A blister forms when moisture or air is trapped under the surface. On a warm day it expands and pushes the membrane up, and over time that turns into a split. We cut it out and patch it in before it opens. A split seam gets cleaned back, bonded and sealed properly, so it does not creep open again the next winter.
| :-: | :-: | :-: | :-: |
| Fault | Likely cause | Typical repair cost | Repair or re-cover? |
| Blister or bubble | Trapped moisture or air under the membrane | £150–£400 | Repair if isolated; re-cover if widespread |
| Split seam or joint | Thermal movement and aged adhesive | £150–£450 | Repair a single seam; re-cover if many have gone |
| Ponding water | Lost fall, sagged deck or blocked outlet | £200–£600 | Repair the outlet or fall; re-cover if the deck sags |
| Failed upstand or flashing | Cracked pointing or a lifted trim | £180–£900 | Repair usually holds long term |
| Cracked, brittle surface | UV, age and general wear | £45–£120 per m² | Usually a re-cover; the covering is spent |
Ponding is the one that catches out older extensions in Lubenham and Foxton. Water that sits more than 48 hours strains the membrane and wears it thin at that exact spot. Sometimes a blocked outlet is all it takes to clear. A sagged deck needs more, and we tell you which it is honestly.
Patch or Re-cover? When a Repair Is Enough
One fault rarely means the whole roof is finished. A single split, a lifted edge or a failed upstand is usually a straightforward repair. A patch on a solid deck can hold for years when the cause is fixed alongside it.
A re-cover makes more sense when the covering is spent across the board. Widespread blistering, a deck that flexes underfoot, or the same patch failing twice all point that way. A felt roof patched three times over the years, while nobody fixes the ponding that caused the first crack, ends up costing more than one proper job would have.
We check the whole roof before we advise either route. The free drone survey shows the upstands, outlets and edge trims a ground-level look always misses, and you keep the footage. If a repair is right, we say so — we do not sell you a new roof you do not need. When a re-cover is the honest call, our Flat Roofing page covers your options in full.
What a Flat Roof Repair Costs in Market Harborough
Cost comes down to the fault, the size of the area, and how easy the roof is to reach. A small, single leak on a sound deck is a modest job. A repair spread across several faults costs more, and at some point a re-cover works out cheaper.
As a general guide for 2026, most flat roof repairs land between £200 and £600. A patch of around one square metre on a solid deck often sits near £350 to £450. By material, felt repairs run roughly £30–£60 per square metre, EPDM rubber £40–£80, and GRP fibreglass £50–£100. Failed flashing or an upstand runs from £180 up to £900 depending on the length and how it is fixed.
What moves a price up or down:
- **Access*— a roof reached by ladder costs less than one boxed in behind an extension
- **Deck condition*— rotten timber under the leak has to come out before any repair holds
- **Number of faults*— several small repairs add up, and a re-cover may win
- **Material*— GRP and lead flashing take more time and skill than a felt patch
- **Cause of the leak*— fixing ponding or a lost fall is more than sealing a seam
These are market ranges, not a quote for your roof. Two leaks that look the same can price very differently once the deck is exposed. The only way to a firm figure is a proper survey — which is exactly what our free drone survey gives you, followed by a clear written price with nothing added later.
Temporary Fixes Buy Time — But They Are Not the Answer
When a leak starts mid-storm, a temporary fix stops the worst of the damage. Flashing tape, a dab of mastic or a tarpaulin can hold water off your ceiling for a few weeks. A temporary weatherproofing visit usually runs from £100 to £400, depending on access.
The catch is that these fixes rarely last more than a winter or two. Tape and sealant over a live fault hide the problem rather than solve it, and the trapped damp often spreads underneath. Think of a temporary fix as first aid, not a cure. We are happy to make a roof safe fast, then book you in for the proper repair once the weather clears.
How We Repair EPDM, Felt and GRP Flat Roofs
Each flat roof system fails in its own way, and each is repaired differently. Getting the method right is what makes a repair last rather than lift again next season.
Ryan Tate, our project manager, repairs these systems day in, day out on roofs around Great Bowden, Kibworth Beauchamp and Great Glen. He will tell you in plain terms which repair suits your roof and how long it should hold.
- **EPDM rubber*patches quickly when caught early. We clean the area back, prime it and bond a fresh piece of membrane over the fault for a watertight seal. A tidy EPDM repair adds years to the roof — our Rubber Roof Repair page goes into the detail.
- **Felt (built-up)*is the easiest to patch but the one most often patched too many times. We cut out the failed section, bond in new layers and seal the laps. Where the felt is brittle across the roof, we are straight with you that a re-cover is the better spend.
- **GRP fibreglass*takes more work. We grind back the damaged area, re-lay matting and re-coat it so the repair keys in and the finish stays seamless. Done properly, you cannot see where the fault was.
Why Market Harborough Homeowners Call Tate & Sons First
A repair is only as good as the roofer who carries it out. Ryan Tate, our project manager, joined the trade full-time after his NVQ Level 3 in Roofing, and works hands-on with EPDM, GRP and felt flat systems every week. He is part of the same crew that turns up to fix your roof, not just the man who quoted it.
For an independent reference on flat roof coverings and repair standards, the LRWA technical guidance is a useful place to read up before you commit to any work.
Founder Michael Tate started his apprenticeship at sixteen and built Tate & Sons on one rule: fix the cause, not just the symptom. He surveys the whole roof before recommending a repair, so you never pay to patch the same leak twice. Between us we carry over 45 years of combined experience, hold NVQ Level 2 and 3 qualifications in Roofing Occupations, and keep CSCS cards and NFRC trade-body membership. Read more about the people behind the work on our About Tate & Sons Roofing page.
Areas We Serve Across Market Harborough and the Harborough District
We repair flat roofs across Market Harborough and the surrounding Welland Valley villages. If your area is not on the list below, call us anyway — if you are nearby, there is a strong chance we cover you.
- Market Harborough (LE16)
- Great Bowden (LE16 7)
- Little Bowden (LE16 8)
- Lubenham (LE16 9)
- Foxton (LE16 7)
- Medbourne (LE16 8)
- Kibworth Beauchamp (LE8)
- Great Glen (LE8 9)
- Fleckney (LE8 8)
- Husbands Bosworth (LE17 6)
- Desborough (NN14 2)
Got Questions?
Your Flat Roof Repair Questions, Answered Properly
Why does my flat roof keep leaking?
A flat roof that leaks again after a repair usually has an unfixed cause behind it. Ponding, a lost fall, a failed upstand or wet insulation keeps working at the same weak spot. Patching the surface without curing the cause only buys a season. We trace the leak back to its source first, then fix the cause and the symptom together, so it stays dry.
Can you patch a flat roof or does it need replacing?
You can patch a flat roof when the fault is local and the deck underneath is sound. A single split, a blister or a failed seam patches well and holds for years. Replacement is the better call when the covering is brittle across the roof, the deck flexes, or the same patch keeps failing. We check the whole roof on a free drone survey, then give you the honest answer.
How can I tell if it is a leak or condensation?
A leak tracks with the weather — the damp mark darkens or spreads within a day or two of heavy rain. Condensation shows up on cold, still mornings even when it is dry outside, often as thin black mould in corners. A leak leaves a sharp brown ring near an outlet, wall or rooflight. The fixes are completely different, so we confirm which one you have before quoting.
How much does a flat roof repair cost in Market Harborough?
Most flat roof repairs land between £200 and £600, with a small patch on a solid deck often near £350 to £450. Failed flashing or an upstand runs from £180 up to £900 depending on the length. The final figure comes down to the fault, the access and the deck condition. A free drone survey gives you an exact written price rather than a rough estimate over the phone.
How long does a flat roof repair last?
A proper repair on a sound deck lasts several years, and often much longer on EPDM or GRP. A felt patch typically holds three to seven years before the ageing membrane fails around it. A quick tape or sealant fix rarely lasts more than a winter or two. The difference is whether the cause was fixed alongside the surface, which is exactly how we work.
What causes blisters on a flat roof?
Blisters form when moisture or air is trapped under the covering, usually from poor bonding, ponding or an ageing surface. On a warm day the trapped moisture turns to vapour and pushes the membrane up. Left alone, the constant swelling and shrinking splits the surface and lets water in. We cut out an isolated blister and patch it before it opens, or advise a re-cover if the roof is blistered across the board.
Can you repair an EPDM rubber roof?
Yes, and EPDM is one of the easier systems to repair when a fault is caught early. We clean the area back, prime it and bond a fresh piece of membrane over the damage for a watertight seal. A neat repair adds years to the roof at a fraction of the cost of replacement. Where the rubber has failed widely, we will tell you a re-cover is the better spend.
Is a temporary flat roof fix worth it?
A temporary fix is worth it to stop water reaching your ceiling in a storm, and little else. Flashing tape, mastic or a tarpaulin holds for a few weeks, usually for £100 to £400. It hides the fault rather than solving it, and the trapped damp often spreads. We are glad to make a roof safe fast, then book you in for the proper repair once the weather allows.
Book Your Free Drone Roof Survey Today
See exactly what your flat roof needs before any work starts. No ladders, no pressure — just a clear picture from a local Market Harborough team.
Every week a leaking flat roof waits, water works deeper into the deck and timber beneath it. A quick, free survey today tells you exactly where you stand — and often the fix is smaller and cheaper than you feared. Book now, get an honest quote, and stop the damp before the next downpour finds the weak spot.
ð 5 Hood Close, Market Harborough, LE16 9XS
ð 01858 457600
Call the Market Harborough team today on 01858 457600, or request your free drone survey online. We're already working across your area.
Book Your Free Drone Roof Survey
See exactly where your roof stands, with no obligation and no pressure. Call our Market Harborough team or request your free drone survey today.
Get in Touch
Tate & Sons Roofing — Market Harborough Office
5 Hood Close, Market Harborough, LE16 9XS
📞 01858 457600
✉️ [email protected]