Flat roofing services
Flat Roof Repairs & Leak Detection
A leaking flat roof rarely fixes itself. We trace the true source of the problem, which is often not where the water appears inside, and carry out a durable repair. Where a roof is beyond economic repair we will tell you straight, so you are not throwing money at a covering that needs replacing.
Finding the real cause of a flat roof leak
Water is deceptive. It enters a roof at one point, travels along the deck or insulation, and shows up inside somewhere else entirely. Patching the damp patch on the ceiling rarely works, because the real fault is often a lifting lap, a split, a blocked or perished outlet, or worn detailing around an upstand or flashing several feet away.
We inspect the whole roof, not just the obvious spot: the laps and seams, the outlets and drainage, the upstands, kerbs and flashings, and the areas where water ponds. Where a leak is proving elusive, or the roof is covered with ballast, paving or a green roof, we use electronic leak detection to pinpoint the breach to within centimetres. Finding the true source is what makes a repair last instead of failing again after the next downpour.
Emergency flat roof repairs
An active leak does damage every hour it is left, soaking insulation, ceilings, electrics and stock. We prioritise active leaks and, where needed, carry out a temporary make-safe to stop water getting in while we plan the permanent repair.
If you have water coming in now, call us on 01302 315245 and we will advise on the quickest safe fix and get you booked in. We cover Doncaster and the surrounding South Yorkshire towns, so help is local.
Repair or replace? Honest advice
Sometimes a repair is exactly right and buys a roof several more good years. Sometimes it is a false economy on a covering that is failing all over. We will give you a straight answer either way, with the reasoning, so you can spend your money where it actually helps.
Repairs are carried out with materials matched to your roof system, a welded patch on single ply, a compatible liquid repair around detailing, or the correct approach for felt and asphalt, not a quick smear of mastic that lifts within months.
Why choose us
What you get with Sureseal
Leak detection
We find the real source of the leak rather than patching the symptom.
Lasting repairs
Repairs carried out with the right materials for your roof system, not a quick smear of mastic.
Honest advice
Clear guidance on repair versus replacement so you spend your money wisely.
Emergency response
We prioritise active leaks and can make safe to protect your property from further damage.
Systems & materials
What we install and use
Welded single ply repairs
Hot-air welded patches and detailing on single ply roofs, fused into the existing membrane.
Liquid repairs
Cold-applied PMMA or polyurethane around outlets, upstands and complex detailing where a poured repair lasts.
Felt & asphalt repairs
The correct compatible repair for older built-up roofs, done properly rather than patched with mastic.
Flashings & sealants
Renewed flashings, trims and high-grade sealants where the detailing has perished.
Our process
What to expect
- 1
Inspection
We assess the roof, identify the cause and check the surrounding detailing and drainage.
- 2
Recommendation
A straight answer on whether a repair is worthwhile or replacement is the better value.
- 3
Repair
We carry out the agreed repair using materials matched to your roof system.
- 4
Aftercare
Advice on simple maintenance to help avoid repeat problems.
Frequently asked questions
Can you find a leak even if you cannot see it from inside?
Yes. Water often travels before it shows inside, so we inspect the whole roof, outlets, upstands, laps and flashings, to find the true source rather than patching the symptom.
Do you offer emergency flat roof repairs?
Yes. We prioritise active leaks to limit damage and can carry out a temporary make-safe where needed. Call 01302 315245 and we will advise on the quickest safe fix.
Is it worth repairing an old felt roof?
Sometimes a repair buys useful years; sometimes it is money down the drain on a covering that is failing all over. We will give you an honest view at the inspection.
How much does a flat roof repair cost?
It depends on the cause and the access, but a targeted repair is far cheaper than a replacement. We will quote clearly once we have found the real fault.
Will the repair last?
A repair made to the true cause, with materials matched to your roof system, lasts. A blind patch over the damp patch usually does not, which is why we trace the source first.
Other flat roofing services
Commercial Flat Roofing
Large-area single ply roofing for warehouses, units and public buildings. Phased, certified, minimal disruption.
Learn more →Roof Maintenance
Planned maintenance, surveys and minor repairs that protect your roof and keep manufacturer guarantees valid.
Learn more →Single Ply Flat Roofing
Hot-air welded PVC & TPO membrane systems, the watertight, long-life choice for flat and low-pitch roofs.
Learn more →Domestic Flat Roofing
Flat roofs for extensions, dormers, garages and porches, warm, watertight and finished to a high standard.
Learn more →New Roofs & Replacement
Full strip-and-refit replacements and brand-new flat roofs, built up as warm roofs and guaranteed for the long term.
Learn more →Electronic Leak Detection
We test roofs electronically to pinpoint leaks and prove integrity, then give you a full report with every breach located and photographed.
Learn more →Liquid Roofing
Cold-applied, seamless PMMA and polyurethane waterproofing for balconies, complex roofs and heavy detailing.
Learn more →Get a free, no-obligation flat roofing quote
Speak to a single ply specialist today. We survey your roof, explain your options and put it all in writing, with no pressure.