Torch-On Felt Roofing
High-performance built-up felt, applied in multiple layers for a hard-wearing, fully bonded finish. A dependable, cost-effective flat roofing choice for Guildford extensions, garages and outbuildings.
Flat roofing specialists in Guildford
Flat roofers in Guildford you can rely on.
Flat roofs fail at the details — the falls, the upstands, the flashings. We have been getting those details right since 1969, across every kind of flat roof in Guildford, from garage roofs and rear extensions to full commercial coverings.
- Established 1969
- Felt, EPDM & GRP systems
- Free, no-obligation quotes
Established 1969
Over five decades of roofing across Surrey.
Every flat roof system
Felt, EPDM rubber and GRP fibreglass.
Free written quotes
Surveyed first, priced honestly, no obligation.
Homes & commercial
Domestic extensions through to industrial units.
Your local flat roofing experts
A flat roof is only as good as the person who laid it.
Most of the failed flat roofs we are called out to in Guildford did not fail because of the materials. They were sound coverings let down by poor falls, skimped upstands or flashings that were never properly dressed in. Water finds those weaknesses within a winter or two.
GK Foster & Son Roofing has been working on Surrey roofs since 1969. That is long enough to have seen every flat roofing fashion come and go, and long enough to know which systems genuinely last on which buildings. We survey the roof first, tell you honestly whether it needs repairing or replacing, and then do the job properly.
Our roofers are trained to current standards and keep that training up to date. You get the same care on a single garage roof as on a full commercial covering.
Flat roofing services Guildford
What we do
Whether you need a new flat roof on an extension, a leak traced and fixed, or an old covering stripped off and rebuilt, we cover every part of flat roofing in Guildford.
EPDM Rubber Roofing
Single-ply rubber membrane laid in one seamless sheet, so there are no joins for water to find. Highly flexible and weather-resistant, making it well suited to Surrey’s wet winters.
GRP Fibreglass Roofing
Glass-reinforced polyester cured in place to form a rigid, seamless flat roof with a clean, modern finish. An excellent option where the roof is walked on or overlooked from above.
Flat Roof Repairs
Leaks, splits, blistering, failed flashing and standing water traced back to the source and put right properly — not patched over and left to fail again next winter.
Flat Roof Replacement
Full strip-off and rebuild when a flat roof has reached the end of its life, including deck repairs, upgraded insulation and new drainage falls where they are needed.
Drainage & Falls Correction
Ponding is the single biggest cause of flat roof failure. We re-profile falls, refit outlets and correct guttering so water leaves the roof instead of sitting on it.
Need a flat roofer in Guildford?
Contact us today for a free quote and honest advice on your flat roof.
Our workmanship
Recent flat roofing work in Guildford and Surrey
Felt, rubber and fibreglass flat roofs we have installed, stripped back and repaired — including the lead work, edge trims and drainage details that decide how long a flat roof actually lasts.
Areas we cover
Flat roofers covering Guildford and the surrounding villages
Guildford is our core patch. Working from Godalming, we are close enough to get to a leaking flat roof in town quickly, and we cover the villages around it just as readily.
The town's housing stock keeps us busy with flat roofs: post-war semis in Bellfields and Stoughton with flat-roofed rear extensions and garages, Victorian and Edwardian terraces off the London Road with parapet roofs and rear outriggers, and the many 1960s and 1970s properties around Merrow and Burpham built with flat-roofed dormers and porches. Add in the commercial units on the Slyfield estate and there is very little flat roofing in Guildford we have not worked on.
- Guildford
- Godalming
- Merrow
- Burpham
- Onslow Village
- Shalford
- Worplesdon
- Ash
- Normandy
- Send
- Ripley
- Chilworth
Just outside this list? Get in touch — we will tell you straight away whether we can help.
Guildford's flat roofing company
Straight answers, proper workmanship, no pressure.
We are a family roofing firm, not a call centre. When you ring the number on this page you speak to the people who will be on your roof, and the price we quote is the price you pay.
If a repair will see you right for another ten years, we will tell you that rather than sell you a replacement. That is how a business lasts since 1969 — on people ringing back, and telling their neighbours.
- Full survey before any quote is given
- Clear written quotes with no obligation
- Leaks traced to the cause, not patched over
- Correct falls and drainage on every new roof
- Lead work and flashings dressed in properly
- Work to current building regulations
- Sites left clean and tidy at the end of each day
- Same team from first visit to final inspection
Frequently asked questions
Flat roofing questions, answered
How long does a flat roof last?
It depends on the system. A well-installed torch-on felt roof typically gives 15–20 years, EPDM rubber commonly 25–30 years, and GRP fibreglass in a similar range when the substrate underneath is sound. Workmanship matters as much as the material — most flat roofs we are called to in Guildford have failed at the detailing rather than in the middle of the sheet.
Can you repair my flat roof, or does it need replacing?
We will always tell you honestly. If the deck is sound and the problem is localised — a split seam, failed flashing or a blocked outlet — a repair is usually the sensible option. If the covering has reached the end of its life or water has been sitting in the insulation, repairs become a false economy and we will say so rather than take the smaller job.
Why does water sit on my flat roof?
Flat roofs are never truly flat — they are built with a slight fall so water runs to an outlet. Ponding means the fall has been lost, usually through deck deflection, an original build that was never laid to fall, or a blocked outlet. Standing water accelerates covering failure, so it is worth correcting rather than living with.
Do you cover the whole of Guildford?
Yes. We work throughout Guildford and the surrounding villages, including Merrow, Burpham, Onslow Village, Shalford, Worplesdon, Ash, Normandy, Send, Ripley and Chilworth. If you are just outside that list, call us — we will tell you straight away whether we can help.
How much does a new flat roof cost in Guildford?
It comes down to the size of the roof, the system you choose, the condition of the deck underneath and whether access needs scaffolding. We do not quote blind — we survey the roof first, then give you a clear written quote with no obligation, so you know exactly what you are paying for.