Rear extension flat roofs on Kesgrave's 1980s and 1990s housing stock are reaching the age where replacement becomes necessary. We install grp-fibreglass">GRP fibreglass, EPDM and felt flat roofing systems across Kesgrave and Rushmere St Andrew.
Tell us the job in 30 seconds. No pushy sales, no call-out fee.
📞 Call Now: 01473 807630Kesgrave's large residential estates were built predominantly in the 1980s and 1990s. Many of the properties have single-storey rear extensions — added either as part of the original build or by subsequent owners — and these extensions carry flat roofs that are now 20–35 years old. This is the age range where original felt flat roofs typically fail: the felt has dried and cracked, the decking below may have softened from slow water ingress, and the drainage is often inadequate for the roof geometry.
The most common flat roof situation we encounter in Kesgrave is an extension roof where water has been tracking slowly under the felt for years. The homeowner is often unaware until water appears through the kitchen or utility room ceiling — by which point the decking has softened and needs replacing as well as the membrane. Early intervention is significantly cheaper.
For most 1980s–1990s extension flat roofs in Kesgrave, GRP fibreglass on a new 18mm OSB deck is our standard specification. The seamless GRP membrane is installed directly onto the new deck, the drainage fall is checked and corrected if needed, and the perimeter upstands are detailed to prevent water ingress at the wall junction. The result is a flat roof that should be maintenance-free for 25+ years.
Free survey · No call-out fee
📞 01473 807630"Extension flat roof — old felt had given up after 22 years. New GRP on fresh OSB deck, done in two days. No more leaks, and the roof looks far better than the old grey felt did."
"They found the decking on our flat roof had softened on one corner — replaced it as part of the job at no extra surprise cost. All included in the original quote. Very straightforward."
"GRP flat roof on garage and single-storey extension done together. Good price for both, completed in two days. Tidy work, good communication."
A flat roof that's failing announces itself with pooling water, blisters, splits or internal damp below. On Ipswich extensions and garages, these are the signs it needs attention rather than another patch.
When it is not the answer: If the membrane is sound and only a lap or upstand has lifted, a localised repair is the right fix — you don't need a full re-cover, and we won't sell you one. Read the full guide.
Flat roofs turn up all over Ipswich — the rear kitchen extensions on the suburban stock, the ageing felt garages across the estates, the dockside and waterfront flats that take the full weather off the Orwell, and the flat-roofed dormers on loft conversions. Each calls for a different answer. Small suburban extensions suit seamless GRP; larger, simpler spans suit EPDM; and the exposed waterfront roofs need robust perimeter fixing and proper falls whichever system goes on. The one detail that decides whether a flat roof lasts its full life or fails early is drainage — a flat roof is never truly flat, and an under-falled roof that ponds water is the fastest route to membrane failure in Ipswich's wet autumns.
System choice on an Ipswich flat roof comes down to size, shape and exposure. GRP fibreglass is laid wet and cured to a single seamless surface with no joints to fail — ideal for the rear extensions and garages that make up most of the local work, with a design life beyond 25 years. EPDM rubber suits larger, simpler spans and the exposed dockside roofs where a single sheet performs well. Modern torch-on felt is the budget option, a genuine improvement on the old pour-and-roll felt but shorter-lived. Whichever system goes on, we build in adequate falls to Building Regulations and, where more than half the roof is replaced, upgrade the insulation to current standards — a warm-deck build-up on the many Ipswich extensions with a habitable room below.
We assess the deck, the falls, the upstands and the current covering to recommend GRP, EPDM or felt for your specific roof and its exposure.
A fixed price for the system chosen, with any deck repair and insulation upgrade separated out and explained.
We book a run of dry days for GRP; EPDM and felt can go on year-round.
We strip the old covering, repair or replace the deck, build in proper falls, and lay the new system with dressed upstands and trims.
Site cleared, waste removed, and the guarantee handed over in writing.
| Job | Typical duration |
|---|---|
| Single garage re-cover | 1–2 days |
| Small rear extension (8–20 m²) | 2–3 days |
| Larger extension flat roof | 3–5 days |
| Flat-roofed dormer re-cover | 1–2 days |
GRP needs dry, warmer conditions to cure — we schedule around Suffolk's cold snaps and wet spells.
Most Ipswich flat roofs are single-storey and reached from a tower or ladder; scaffold is quoted only where the flat roof is at height or over an awkward drop. Scaffold is specified for: flat roofs at first-floor level, dormers, and anything over a difficult access point - always itemised in your written quote, never a hidden extra, and we arrange it.
Kesgrave is dominated by post-war and later concrete-tile estate housing with open frontages — access is straightforward, and the roofs are the classic nail-sickness and mortar-verge market. Pavement scaffold and skip permits go through East Suffolk Council; allow a few working days on streets like the Bell Lane estate roads, Dobbs Lane where space is tight.
Kesgrave grew rapidly from the 1950s onwards and is now one of the largest villages in England, which means street after street of post-war and later estate housing carrying concrete interlocking tiles of a similar age. That makes it the classic nail-sickness and mortar-verge territory: whole roads reach the point of tile slippage and failed ridge mortar at roughly the same time. The open frontages keep access and scaffold costs down compared with the terraced parts of Ipswich, so a re-roof or a dry-verge conversion here is usually more straightforward and better value than the same job on a tight town-centre street.
| Job | Typical range | Notes |
|---|---|---|
| Single garage re-cover (GRP/EPDM) | £800 – £1,800 | Deck condition affects price |
| Small rear extension (8–20 m²) | £1,200 – £3,000 | GRP typical for this size |
| Larger extension flat roof | £2,500 – £6,000 | System to suit size and exposure |
| GRP fibreglass (per m²) | £90 – £120 | Seamless; 25-year manufacturer warranty |
| EPDM rubber (per m²) | £80 – £110 | Best for larger, simpler areas |
Worked example: A GRP re-cover on a 14 m² kitchen extension in Whitton, including a new deck edge and proper falls built in: about £2,400 over two dry days.
No deposit on small flat-roof jobs under £500. Staged payments on larger work — nothing before materials are on site. VAT included in the written quote.
Covering IP5 and surrounding postcodes.
The flat roof system carries a written 10-year workmanship guarantee; GRP and EPDM membranes carry manufacturer warranties of 20–25 years on top.
If a fault appears in covered work, we come back and put it right. No quibbling, no re-charge.
Flat roof work is low-disruption — a little noise during strip-out and the smell of resin on a GRP day, which clears quickly. You don't need to be home for external work. You do not need to stay home for external work - we just need power and access agreed in advance.
EPDM and felt fit year-round; GRP waits for dry conditions. If rain interrupts, we make the deck watertight before we leave. Exposed, elevated estate positions catch wind funnelling between regularly-spaced houses.
A standard rear extension flat roof (15–25 sq m) in Kesgrave costs £1,100–£2,200 in GRP including new decking where required. We survey and quote free of charge.
Very likely, yes. A damp patch on an extension ceiling, particularly after rain, usually indicates flat roof membrane failure. The earlier you deal with it, the less likely the decking below has softened and needs replacing. Call us for a free survey.
A correctly installed GRP flat roof should last 25 years or more. We back all our flat roofing installations with a 10-year written guarantee on workmanship.
If the deck is sound and the failure is a small localised split in GRP or felt, repair is possible. If the original felt has multiple failures or the deck has softened from water ingress, replacement is almost always the better investment. We'll tell you clearly which applies after our free survey.
No call-out fee on any job across Kesgrave and Suffolk. Free surveys, free quotes — you only pay once you have agreed the work in writing. Call 01473 807630 any time.
Yes. We carry £5m public liability insurance on all work in Kesgrave and the surrounding Suffolk area. We are also registered with the NFRC — details available on request before any job starts.
All our roofing work in Kesgrave carries a 10-year written workmanship guarantee. This covers the labour and installation — separate to any manufacturer guarantee on materials. We provide the guarantee document on completion of every job.
No call-out fees. No obligation. Local Ipswich roofers covering Kesgrave and all of Suffolk.
01473 807630 ✉ Email Us Instead