Flat Roof Replacement Cost by System · All Sussex
EPDM, GRP or Felt? Get Your Fixed Price, Free.
Want to find out the cost of a flat roof replacement by system? The price depends on whether you choose EPDM rubber, GRP fibreglass or felt, and on your roof. Request a free quote and we’ll give you a clear fixed price in writing, no guesswork, no pressure.
- Fixed written quote, no hidden extras
- £0 call-out fee · no obligation
- 10-year written guarantee on every repair
What drives the cost?
What affects your flat roof replacement cost?
There’s no single price, your flat roof replacement cost depends on the system you choose, the size and structure of the roof, and the deck beneath. These are the things we look at on the free survey. Want to find out the cost of a flat roof replacement? Request a quote and we’ll price it up properly.
EPDM flat roof replacement cost
A single rubber membrane and the longest-lasting option, which sits at its own price point.
We’ll quote your EPDM flat roof replacement cost properly, measured to your actual roof.
GRP flat roof replacement cost
A seamless fibreglass laminate, ideal for detail and walk-on areas, priced by area and complexity.
Your GRP flat roof replacement cost reflects the deck prep and detailing, all in writing.
Felt flat roof replacement cost
Modern three-layer torch-on felt, the most cost-effective system where the deck is sound.
We’ll give you a fixed felt flat roof replacement cost with no hidden extras.
Cost of replacing a flat roof on an extension
An extension roof is larger and often needs insulation to meet building regs.
We price the cost of replacing flat roof on extension structures with and without a warm-roof upgrade.
Cost of replacing a garage flat roof
A garage roof is usually simpler, so the cost of replacing it is often the most affordable.
We’ll quote the cost of replacing garage flat roof coverings in your chosen system.
The condition of your deck
Whatever the system, if the timber deck has rotted it needs replacing first.
We check the deck on the free survey, so there are no surprise costs later.
Free inspection • No call-out fee
No guesswork, no surprises
Want to know what your new flat roof will cost?
Request a quote and we’ll measure up your roof and give you a clear fixed price in writing, at zero cost and no obligation.
- Free survey
- £0 call-out fee
- Fixed written quote, no hidden extras
Choosing the right system
GRP, EPDM or felt? The system you choose affects the price
There’s no single “best” system, or single price, for every flat roof. The right answer depends on the size and shape of the roof, the deck underneath, how exposed the property is, and your budget. We install all three and recommend whichever fits the job, never whichever earns us the most.
GRP fibreglass
25–30 yrs typical lifespanBest for extensions & complex shapes
A seamless, hard-wearing fibreglass laminate. Brilliant on intricate roofs, balconies and anywhere a crisp, walk-on finish matters.
- Seamless, no joints
- Walk-on tough
- Neat around detail
EPDM rubber
30–50 yrs typical lifespanBest for large flat roofs & coastal exposure
A single rubber membrane laid in one piece. The long-life choice for big spans and exposed, weather-beaten Sussex properties.
- One seamless sheet
- Longest lifespan
- UV & coastal proof
Torch-on felt
15–25 yrs typical lifespanBest value where the deck is sound
Modern multi-layer built-up felt. The most cost-effective route when the existing deck is in good order and you want a proven, reliable system.
- Most affordable
- Proven & reliable
- Great for warm roofs
On survey we lift a small section of the existing roof to check the deck, measure the falls and flag any drainage or detailing that needs correcting. Your written quote covers the full system, any decking work, insulation upgrades where they help, and a water test on completion.
Free survey • No call-out fee
How it works
What happens when you call LF Flat Roofing
Free survey
We visit, lift a section to check the deck, measure the falls and assess every detail: upstands, skylights, drainage.
Written quote
Fixed price, system recommendation, materials and timescales, all clearly explained and sent within 24 hours.
Replacement
Old roof stripped, deck checked and replaced where needed, insulation upgraded if specified, new system fitted to spec.
Handover
Water test on completion, photo records of every stage and your 10-year written guarantee, handed over.
A fixed price, tailored to your roof
Find out the cost of your flat roof replacement
Every roof is different, so we price yours properly. Request a quote and most homeowners get a fixed written price the very next day.
- 10-year written guarantee
- GRP, EPDM, felt & lead
- No-pressure, no upselling
Why choose us
Why Sussex homeowners choose LF Flat Roofing
10-year written guarantee
A written workmanship guarantee on every replacement, on top of the manufacturer’s product warranty. Water-tested on completion and Icopal-approved, so your roof is covered for a decade.
Icopal-approved contractor
Trained, tested and certified to install and guarantee Icopal systems to the highest standard.
Honest expert advice
We fit GRP, EPDM and felt and recommend what suits your roof. If a repair will do, we’ll say so.
Free survey, no obligation
We lift a section to check the deck, then give a fixed written quote. No call-out fee.
Tidy, professional work
We protect your property and garden, work cleanly and take all waste away.
Photo records at handover
Every stage documented: deck, insulation, membrane and finished detail.
Recent work
Flat roofs we’ve replaced across Sussex
A few recent replacements in GRP, EPDM and felt. Every job is stripped, re-decked where needed, water-tested and handed over with full photo records.
Burgess Hill
Garage flat roof · EPDM re-roof
Steyning
Rear extension · warm roof + EPDM
Newhaven
Outbuilding · full strip & EPDM
Free survey • No call-out fee
Real customers
What Sussex homeowners say about LF Flat Roofing
“Competitive pricing, excellent standard of work. very happy with the outcome.”
“Liam recently replaced the flat front roof on our large porch following a leak. Really impressed with how it looks and how the work was carried out.”
“The work they carried out was amazing they quick clean and efficient”
Questions
Flat roof replacement cost by system, your questions answered
The LF Flat Roofing team
Our promise to you
You risk absolutely nothing
Requesting a quote is the easy, zero-risk first step. Here’s exactly what you’re agreeing to, and what you’re not.
Free survey, £0 call-out
We visit, get on the roof and quote for nothing. No fee, no catch.
Fixed written quote in 24 hrs
A clear price in writing, what we quote is what you pay.
No pressure, no upselling
If a repair will do, we’ll tell you. The decision is always yours.
10-year written guarantee
Water-tested on completion and guaranteed in writing for a decade.
Free survey. Written quote. No pressure, ever.
Find out the cost for your chosen system
Want to find out the cost of a flat roof replacement in EPDM, GRP or felt? We’ll visit, assess the roof and give you an honest, fixed written price. No call-out fee, no obligation, no surprises.
- Serving all of Sussex
- Icopal-approved contractor, trained & certified
- 10-year written guarantee on every repair
- Photo records for your insurance claim
- £0 call-out fee · serving all of Sussex