GRP fibreglass and EPDM rubber flat roofing for extensions, garages and outbuildings. No more leaking felt. Long-lasting seamless systems with 20-year manufacturer warranties.
Chichester’s coastal UV intensity and harbour moisture make the flat roof system specification more consequential than in inland locations. GRP fibreglass and EPDM rubber both significantly outlast traditional felt in this environment. We specify the system to the property, size and exposure conditions at the survey.
GRP cures to a seamless rigid surface with no joints to open. The UV-stable gelcoat provides protection that outlasts felt surface treatment by a factor of 3 to 4 in Chichester's coastal UV environment. Design life of 25 to 40 years. We back all GRP installations with a 20-year manufacturer guarantee and a 10-year workmanship guarantee.
EPDM single-ply membrane is installed in very large sheet sizes — often a single sheet for a standard garage. Its flexibility handles building movement without cracking. Excellent UV and ozone resistance with a design life of 30 to 50 years. Preferred for large areas and any application where structural movement is anticipated.
Traditional mineral felt has a 8 to 12 year lifespan in Chichester's coastal UV environment. The upfront saving versus GRP is recovered in the first replacement cycle. Over 30 years, felt is significantly more expensive than GRP — both in direct cost and in the disruption of repeated replacement. We do not specify felt for any new flat roof installation.
Free survey — no call-out fee — Whyke & surrounding area
📞 01243 278085Victorian and edwardian terraces, original lead work, conservation context. For flat roofing in Whyke, this means lead flashing failure on century-old installations, chimney pointing failure. We factor this into our survey, specification and material choice on every Whyke job — not as an afterthought but as the starting point for getting the work right.
"Excellent garage flat roof replacement in grp. Free survey, clear quote, arrived on time and cleaned up completely. Exactly what you want."
"Used them for extension flat roof with epdm. Honest assessment, matched materials perfectly, no pressure on scope. Very happy with the result."
"Called for failed felt replaced with grp fibreglass after another contractor let me down. Professional from first call to completion. Recommend unreservedly."
Whyke's northern streets carry victorian and edwardian terraces with original lead work that in many cases has not been properly replaced in over a century. For roofing work in Whyke, this means Lead soaker replacement at chimney positions is a consistent Whyke call — the original Victorian lead at these properties is at or past its service life on most un-maintained examples. Whyke road, whyke lane and the surrounding period streets. We factor all of this into our survey, specification and material choice on every Whyke job.
Whyke's Victorian terraces and their century-old lead work are a regular part of our working week. The knowledge of what original Victorian leadwork looks like, how it should be replaced, and what the correct specification is for these properties comes from doing the work repeatedly on the same streets over two decades.
Free survey across all Chichester postcodes and the surrounding area. Written quote with full itemised breakdown. No call-out fee, no obligation, and no pressure to commit before you are ready. We have been carrying out this work in Chichester and the surrounding area for over 20 years. Our reputation here is built on honest assessment and correct specification — not on selling work that is not needed. Call 01243 278085 to arrange a free survey.
The flat roofing specification for properties in the Chichester coastal area needs to account for UV intensity, salt aerosol and the wind loading that differs between sheltered city centre locations and exposed peninsula sites. GRP performs well across the area when correctly installed. EPDM is preferred for larger areas and the most exposed coastal sites where installation temperature constraints make GRP more difficult to specify with confidence. We advise on the system appropriate to each property at the survey.
Costs vary by scope and access. Garage Flat Roof (GRP): £900–£1,800. Extension Flat Roof (GRP): £1,800–£4,000. We provide a free survey and written itemised quote for all work in Whyke — no obligation to proceed.
Yes. Whyke is part of our regular working territory. We carry out flat roofing across all Whyke postcodes and the surrounding area. Our own team on every job — no subcontractors.
No. The survey visit and quote are free with no obligation. For emergency work, we charge only for the make-safe and repair — no separate call-out fee on top.
Minor repair or maintenance visits typically take 2 to 4 hours. Larger jobs — re-roofing, full flat roof replacement — take 3 to 7 days depending on size and complexity. We confirm the programme in the written quote.
Scaffold requirements depend on the job and property height. We confirm access requirements in the written quote. Scaffold cost is always included as a line item so there are no surprises.
Yes. Victorian and edwardian terraces, original lead work, conservation context. For flat roofing this means lead flashing failure on century-old installations, chimney pointing failure. We specify materials and methods appropriate to Whyke's specific conditions at the survey.
Yes. Our NFRC membership is current and verifiable at nfrc.co.uk. We hold £5m public liability insurance and provide a written 10-year workmanship guarantee on all flat roofing in Whyke. All credentials available on request.
Every flat roof survey covers: the existing deck condition (whether the existing decking boards are sound or require replacement), the current falls (whether adequate drainage exists or whether tapered insulation is needed to correct the falls), the upstand heights (whether the covering can be taken up to the required minimum height at edges and abutments), and the outlet position and sizing. In Whyke Chichester, where Victorian and Edwardian terraces with original century-old lead, we also assess whether coastal UV intensity or harbour moisture exposure affects the system recommendation. A flat roof that drains correctly and has proper upstand details lasts decades longer than one where these fundamentals were not addressed at installation.
GRP fibreglass is applied as a liquid laminate that cures to a rigid seamless surface. We apply two layers of chopped strand mat saturated with resin, followed by the coloured gelcoat finish. The entire surface is seamless — no joints to open, no laps to fail. Upstands are formed to the correct height and radius at all edges. Outlets are GRP-lined. The gelcoat provides UV protection that significantly outlasts felt surface treatment in Chichester's coastal UV environment. Installation requires temperatures above 5°C — we plan flat roof work around weather forecasts to ensure the correct curing conditions.
A standard single-car garage flat roof in GRP typically costs £900 to £1,800 in Whyke Chichester. Rear extension flat roofs up to 25m² cost £1,800 to £4,000. Larger areas of 25 to 60m² run £3,500 to £7,500. These prices include deck inspection, any necessary deck replacement, falls correction where needed, full GRP lamination and gelcoat finish. EPDM rubber costs approximately 10 to 15 per cent less than GRP on the same area with comparable performance over the long term.
Honest pricing from a local Chichester roofer. Free survey, written quote, no obligation in Whyke.
01243 278085 ✉ Email Us