Rear extension flat roofs on Kesgrave's 1980s and 1990s housing stock are reaching the age where replacement becomes necessary. We install GRP fibreglass, EPDM and felt flat roofing systems across Kesgrave and Rushmere St Andrew.
Kesgrave'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.
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📞 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 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.
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