Flat Roof Installation & Repairs in Sheffield
Long-life flat roofing for extensions, garages, dormers and commercial buildings. EPDM rubber, GRP fibreglass and felt systems — installed and repaired by a fully insured Sheffield team.
- 5-star ratedSheffield homeowners
- Fully insuredPublic liability cover
- Up to 20-yr systemsEPDM & GRP
- Fast responseLeaks made safe quickly
Flat roof problems
Common flat roof problems we fix
Old felt flat roofs rarely last. If yours is showing any of these, it’s time for a repair or replacement:
- Pooling water that doesn’t drain away
- Cracks, splits or blisters in the felt
- Leaks into the room or garage below
- Lifting or peeling at the edges and joints
- Moss, damp and sagging decking
- An old felt roof past its best
Our flat roofing
Flat roof systems we install
We’ll recommend the right system for your roof, budget and how long you want it to last.
EPDM Rubber Roofing
Single-piece rubber membrane — durable, seamless and up to 20+ years’ life.
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GRP Fibreglass
Tough, seamless fibreglass with a hard-wearing finish — ideal for foot traffic.
Learn more →Felt & Warm Roofs
Modern torch-on felt and insulated warm-roof build-ups to replace tired felt roofs.
Learn more →
Garage & Commercial
Garage roofs, extensions and commercial flat roofs — repaired or fully replaced.
Learn more →Flat Roof Repairs
Leak tracing, patching and resealing to get more life from your existing roof.
Roof repairs →
Rooflights & Drainage
Flat-roof windows, lanterns and proper falls and outlets so water drains away.
Rooflights →Flat roof leaking?
If water’s getting into the room or garage below, don’t wait. We’ll make it safe fast, then plan a permanent repair or replacement across Sheffield & South Yorkshire.
Why choose AJR Roofing
Flat roofs done right
Most flat roofs fail because of poor falls and bad detailing. We get the fundamentals right so yours lasts.
- Correct falls & drainage so water can’t pool.
- Quality EPDM & GRP from trusted suppliers.
- Clean detailing at edges, upstands and outlets.
- Fully insured & guaranteed workmanship.
- Clear fixed quotes with no hidden extras.
How it works
How your flat roof gets done
Free inspection
We assess the roof, decking and drainage and photograph the issues.
Fixed quote
A clear price with the right system recommended for your roof.
Installation
Old covering stripped, decking checked, new membrane and trims fitted.
Guarantee
Final checks, clean-up and your workmanship guarantee.
Pricing
How much does a flat roof cost in Sheffield?
It depends on the size, the system (EPDM, GRP or felt) and whether the decking needs replacing. We give a free inspection and a fixed quote so you know exactly where you stand. Read our Sheffield flat roof cost guide for typical price ranges.
What our customers say
Trusted by Sheffield homeowners
Real reviews from customers across Sheffield & South Yorkshire on Google.
“Anthony did an excellent job replacing a broken tile on my roof. He was friendly, professional, quick and left everything neat and tidy. Highly recommend for anyone needing roofing repairs!”
Steven LeeVerified Google review
“Top service. They came to quote when they said they would with a good price and did exactly what they said. Always answered the phone, came on time and worked hard — a fantastic job. Would highly recommend.”
Andy MVerified Google review
“Work carried out to chimney and guttering — great job! Really pleased. AJR Roofing are so reliable, which I appreciated after other companies didn’t even respond. Will definitely recommend.”
Amanda GerrettVerified Google review
FAQs
Flat roof questions, answered
How long does a flat roof last?
A modern EPDM or GRP flat roof can last 20–30 years when installed correctly — far longer than old-style felt.
Do flat roofs always leak?
No. Most leaks come from poor falls or bad detailing on old felt roofs. A properly installed EPDM or GRP roof with correct drainage is reliably watertight.
Can you replace my old felt roof with something longer lasting?
Yes — we regularly replace tired felt roofs with EPDM rubber or GRP fibreglass for a far longer-lasting, low-maintenance finish.
Do you repair flat roofs as well as replace them?
Yes. If the roof has life left in it we’ll trace the leak and repair it; if not, we’ll quote for a replacement. See our roof repairs page.
How much does a flat roof cost in Sheffield?
It depends on size and system, so we quote after a free inspection. See our flat roof cost guide for typical ranges.
How much does a garage flat roof replacement cost in Sheffield?
It depends on size, the system (EPDM, GRP or felt) and access. We give a fixed price after a free inspection — see our flat roof cost guide for typical ranges.
Do you repair and replace commercial flat roofs in Sheffield?
Yes. We install and repair commercial and industrial flat roofs across Sheffield and South Yorkshire, including warm roofs and larger single-ply systems.
Need a flat roof in Sheffield?
Book a free, no-obligation inspection and get a fixed price for your repair or replacement.
Related roofing services & guides
Explore our other Sheffield roofing services and free pricing guides.