We'll transform your worn-out roof into a stunning new one!

If your flat roof is leaking, blistering, or simply at the end of its life, it's time to ditch the felt and invest in something built to last. Sage Roofing are flat roofing specialists covering the Vale of Glamorgan and all surrounding areas — including Barry, Penarth, Cowbridge, Llantwit Major, Bridgend, Cardiff, Dinas Powys, Rhoose, St Athan, Sully, Wenvoe, Ogmore-by-Sea, Pontyclun, and Porthcawl.

We install two of the best flat roofing systems available: EPDM rubber and fibreglass GRP. Both massively outperform traditional mineral felt and come with long-term guarantees, giving you genuine peace of mind whether it's a garage roof, house extension, dormer, or bay window.

Fibreglass GRP Roofing

Fibreglass (GRP) roofing creates a hard, seamless, fully waterproof surface that looks sharp and requires no ongoing maintenance. It's strong, resistant to foot traffic, and can be finished in a range of colours to complement your property. GRP is particularly popular for extensions and garage roofs throughout the Vale of Glamorgan, where a clean, smart finish makes a real difference to the look of a home.

A properly installed fibreglass roof can last 25 years or more and is virtually maintenance-free. Our team are fully trained and experienced in GRP installation, and every system we fit comes with a comprehensive guarantee.

EPDM Rubber Roofing

EPDM (Ethylene Propylene Diene Monomer) is a synthetic rubber membrane offering outstanding flexibility, UV resistance, and waterproofing performance. It's ideal for larger flat roofs and areas subject to thermal movement — making it a go-to choice for properties throughout the Vale of Glamorgan and surrounding areas.

EPDM is installed as a single, fully-bonded membrane, eliminating the seams and laps that are one of the most common failure points on traditional felt roofs. With a lifespan of 50 years or more when properly installed, it represents exceptional long-term value for homeowners across South Wales.

Free Flat Roof Survey — No Obligation

Not sure which system is right for you? Sage Roofing offer free flat roof surveys across the entire Vale of Glamorgan area. We'll assess your existing roof, talk you through your options, and give you a clear, honest quote. Get in touch today — don't let a flat roof problem turn into a structural one.