07793 436 150
LF Flat Roofing · Sussex

GRP Fibreglass Roofing Sussex

Done Once. Done Right. All Work Guaranteed.

  • Icopal-approved specialists
  • Free no-obligation survey
  • 10-year written guarantee on every installation
Storm season runs October to March, survey slots are filling up.
Call now - 07793 436 150
5.0 on Checkatrade, verified homeowner reviews
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Book your free survey

No call-out fee. No obligation. We’ll visit, assess and quote.

  • Icopal-Approved
  • 15+ Years Experience
  • Free Site Survey
  • 10-Yr Written Guarantee
  • Fully Insured
  • All Sussex Covered

Recognise Any Of These? A New GRP Roof Can Fix Them.

Most homeowners put off getting their flat roof looked at. A slow leak becomes a saturated deck. A saturated deck becomes timber rot. What could have been a repair becomes a full replacement, at two or three times the cost.

Persistent leaking

If water is tracking into rooms or staining ceilings after it rains. GRP helps by forming a fully seamless, bonded shell with no joins for water to penetrate.

Blistering or cracking

If your existing felt is lifting, bubbling or splitting across the surface. GRP helps by curing into a rigid, inert membrane that cannot lift, blister or crack.

Pooling water

If water is sitting on your roof and not draining away after rain. GRP helps by allowing correct falls to be built in, directing water away from the surface properly.

Condensation

If rooms below the roof suffer from cold spots or condensation on the ceiling. GRP helps by working with warm roof insulation to eliminate condensation at the source.

Failed repairs

If patches keep coming back and the same areas are leaking repeatedly. GRP helps by replacing the entire covering in one go, removing the cycle of patch repairs permanently.

Age and weathering

If your roof is over 15 years old and has not had a recent inspection. GRP helps by providing a new covering that lasts in excess of 20 years and is resistant to UV, frost and coastal weathering.

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The right solution

GRP fibreglass: the right system for most flat roofs

We use RESTEC GRP systems, chosen for outstanding long-term reliability. As Icopal-approved contractors, every installation follows a strict quality process: lap checks, controlled application and a final water test before we leave the site.

20+ Year lifespan

A correctly installed GRP roof will outlast most other flat roof systems with minimal maintenance required.

10yr Guarantee

Every installation comes with a written workmanship guarantee, backed by LF Flat Roofing directly.

Seamless membrane

The entire roof surface is covered in a single bonded shell with no joins for water to penetrate.

100% Water-Tested

Every GRP roof we install is water-tested before we leave site, so you know it is watertight from day one.

Restec roof of the month
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RESTEC Roof of the Month, November 2025

Recent Projects

Our recent GRP installations

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Why Choose Us

Why Sussex Homeowners Choose LF Flat Roofing

From the first call to the finished job, here is what you can expect.

Icopal-Approved Contractor

We are trained, tested and certified to install and guarantee Icopal roofing systems to the highest standard.

10-Year Written Guarantee

Every installation comes with a written workmanship guarantee. If something goes wrong due to our work, we come back and fix it.

Honest Advice, Not Upselling

We tell you what your roof actually needs. If a repair will do the job, we will say so rather than push you toward a full replacement.

Free Survey, No Obligation

We visit, assess and give you a fixed written quote. There is no call-out fee and no pressure to proceed.

Tidy, Professional Workmanship

We work cleanly, protect your property throughout and remove all waste on completion. You will not know we were there except for the roof.

Photo Records At Handover

We document every stage of the installation so you have a permanent record of what was installed, how and when.

How it works

What Happens When You Call LF Flat Roofing?

From the first call to the finished roof; simple, transparent, no surprises.

Step 01

Free survey

One of our team will visit your property and assess if a repair or a replacement is the best solution.

Step 02

Written quote

Fixed price, materials and timescales clearly explained. Sent within 24 hours.
Step 03

Installation

Deck prepared, GRP applied in layers, lap integrity checked, water test on completion.
Step 04

Handover

10-year written guarantee, photo records and aftercare instructions provided.
Real customers

What Sussex homeowners say about LF Flat Roofing

"LF Roofing have replaced the roof lights in my bungalow, they did a brilliant job, I’ve used them before to replace the roof felt and insulate my flat roof bungalow. They are always courteous and professional, clean up after the job and remove the old materials when it’s completed."
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Verified Checkatrade Reviewer
Homeowner, Lancing
"Replaced old flat roof on a converted garage with a warm roof. Cannot fault the workmanship on a great job. Extemely satisfied with end result. Very reasonable price in line with quotes. Would have no hesitation in using again and certainly recommend Liam to anyone thinking of flat roof repairs you will be more than satisfied."
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Verified Checkatrade Reviewer
Homeowner, Brighton
"Liam came recommended to us and we are so glad we asked him to carry out the work. Always professional, polite and was always available to answer any questions I had. I have no hesitation in recommending LF Flat Roofing to family and friends. Highly competitive quote and nothing was ever too much bother."
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Verified Checkatrade Reviewer
Homeowner, Crawley

Frequently asked questions

Find answers to common questions about our flat roofing services.

How long does a GRP roof last?

When properly installed, a GRP fibreglass roof lasts in excess of 20 years. Unlike felt, it won’t degrade from UV exposure or crack in cold weather. Our installations come with a 10-year workmanship guarantee.
GRP is ideal for smaller roofs with details, angles and penetrations; it forms a seamless bonded shell. For large open spans, EPDM can be preferable. We’ll advise honestly on survey based on your specific roof.
It depends. We assess the substrate on survey. If it’s sound and level, an overlay may be possible. If the deck or insulation has been compromised, we’ll recommend a full strip.
In most cases, no. Re-roofing is permitted development. We’ll flag any exceptions if they arise on your survey.
Yes, we recommend adding PIR warm roof insulation during the re-roof. It improves thermal performance, eliminates condensation risk and avoids a second mobilisation.
Prices vary by size and complexity. We provide a fixed written quote after the free survey, no hidden extras, no surprises.
Still have a question? Call us on 07793 436 150
Ready To Get Started?

Free survey.
Written quote.
No pressure, ever.

We’ll visit your property, assess the roof and give you an honest recommendation with a fixed written price. If a repair will do the job, we’ll tell you.

  • Icopal-approved contractor, trained and certified
  • 10-year written workmanship guarantee
  • Photo records provided at handover
  • £0 call-out fee for survey and quote
  • Serving all of Sussex from Shoreham-by-Sea
01273 055 973
Book your free survey

No call-out fee. No obligation. We’ll visit, assess and quote.

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