5.030 Google reviews10-year guarantee, up to 20 years depending on the job
Flat roofing in Croydon in felt, EPDM or GRP
Which flat roofing will last on your Croydon extension, dormer or garage? Apex survey it and quote free, with no obligation and a 14-day cooling-off period on every flat roof.
Free flat roof quote
Pick the job. It takes about 30 seconds.
Or call free on 0800 404 6688. Pay on completion.
5.0 on Google30 reviews, all 5 stars
Expert Roofer VerifiedEvery check passed, see our profileFlat roof services across Croydon
Three coverings and one repair service. Patrick tells you which suits your roof once he has seen it.
Flat roof repairs
Flat roof leaks traced and fixed on felt, EPDM and GRP, from split seams and blisters to failed flashings and outlets.
See flat roof repairs
EPDM rubber roofing
Firestone RubberCover EPDM laid in a single sheet with no joints, for extensions, dormers and garages across Croydon.
See EPDM rubber roofing
GRP fibreglass roofing
GRP fibreglass flat roofs laid in resin and glass mat, cured into one tough, walkable shell with a coloured topcoat.
See GRP fibreglass roofing
Felt roofing
Torch-on felt systems with a mineral cap sheet for garages, extensions and dormers, laid to proper falls and fully guaranteed.
See felt roofingSigns your flat roof is failing
Flat roofs fail slowly, then all at once.
Water pooling after rain
Ponding on a flat roof means the deck has dipped or the falls were never right. Standing water ages any covering fast.
Blisters and cracks in the felt
Bubbles in felt are trapped air or moisture. The cracks around them open up in cold weather and let water underneath.
Leaks at the wall joint
The upstand where a flat roof meets the house is its weak point. Failed flashing there sends water down the inside of the wall.
Moss and plants on the roof
Anything growing on a flat roof has found grit and water sitting in cracks. The roots then widen those cracks every season.
Spongy deck underfoot
A soft or bouncy feel means water has got into the chipboard or ply deck. It will not dry out, and no covering lasts on top of it.
How Apex replace a flat roof
Patrick gets up on the roof, checks the deck, the upstands and the outlets, and looks at the ceiling below. He photographs the splits, blisters and soft spots so you see the state of it, then talks you through felt, EPDM and GRP. You agree one price up front. Every flat roof comes with a 14-day cooling-off period, so you have time to think it over after you say yes.
The team strips the old covering and replaces any rotten deck with new OSB3 boards. Insulation goes in as a warm deck if you want it. Then the new covering goes on to proper falls, turned up the walls under a flashing and finished with trims that drip into the gutter. The waste is taken away. Flat roofs are fully guaranteed, and you pay on completion.
- Felt, EPDM or GRP
- Rotten deck swapped for OSB3
- Warm deck insulation option
- 14-day cooling-off period
- Flat roofs fully guaranteed
- Payment on completion
Flat roofs on Croydon's extensions and dormers
Croydon has flat roofs everywhere once you look over the garden fence. Rear extensions on Victorian terraces in Thornton Heath and Selhurst, kitchen extensions on 1930s semis in Shirley and Selsdon, box dormers on loft conversions across Addiscombe and Norbury, and garages from Purley to New Addington. Many were covered in built-up felt decades ago and are now blistering. Heavy rain rolling in from the south-west finds every split. Patrick judges each roof on its own merits and prices it that way.
Felt, EPDM or GRP compared
All three are proven flat roof coverings. Here is how they differ.
Torch-on felt
Modified bitumen layers bonded with a torch, topped with a mineral cap sheet that stands up to sun and foot traffic. The familiar choice: good value and simple to patch if it is ever damaged.
Best for: Value and easy future repairs
Firestone RubberCover EPDM
A synthetic rubber membrane laid in one piece and bonded to the deck. It stays flexible in frost and heat, and with no seams across most house roofs there are fewer places for a leak to start.
Best for: Long life with no joints
GRP fibreglass
Glass fibre matting set in resin on the deck, cured into one hard layer and topcoated. It can be walked on, formed around awkward shapes and finished in a choice of colours.
Best for: Walkable roofs and awkward shapes
Flat roof customers on leaks that stopped
Had a problem with my flat roof patrick came and found the solution made it very easy along the way showing me photos and excepting payment on completion highly recomend apex roofing and guttering ltd
Recomend to anyone needing a flat roof repair or renewal Patrick carried out work for me with he’s team supper clean on time and highly recommend to anyone needing a flat roof
My flat roof had a leak called Patrick to come and assess once he found the problem we agreed on the price very happy with he’s work hıghly recommend
Apex roofing and guttering Ltd came and gave me a free quotation on a new roof once I match several quotes I decided to go ahead with Apex. They kept me updated throughout the process showing photos and explaining what’s happening the process was so easy for me highly recommend to anyone needing work done
Had a leak in my lead flashing around my chimney wanted to get it renewed Patrick came with he's team of men and carried out work involving all new code 4 lead flashing since then never seen a leak very happy with the work
Highly recomend apex roofing and guttering ltd patrick came gave me a quote to get repairs done couple weeks later once agreed we aranged a time showed up on time and carried out work as promised highly recomend
Why flat roof prices differ
Flat roofs are priced on size, covering and what lies underneath. EPDM, GRP and felt each cost differently to buy and to lay. A sound deck can stay, while a rotten one has to go. Warm deck insulation, new trims, upstands at walls and outlets into gutters all add to the job. Access through a house or over a garden matters too. Patrick agrees a fixed price with you after the survey, with 14 days to change your mind.
What sets the price
- Roof area
- Felt, EPDM or GRP
- Deck replacement
- Warm deck insulation
- Upstands, trims and outlets
- Access to the roof
Flat roofs questions
When is the best time to replace a flat roof?
Late spring to early autumn is the best time to replace a flat roof, because every covering goes on best in dry, mild weather. Torch-on felt, EPDM adhesive and GRP resin all need a dry deck, and GRP needs mild temperatures to cure. Book the survey in winter and the new roof goes on in the first dry spell. Leaks never wait for summer, though, so if water is getting in now, call and the team will make it watertight in the meantime.
What is the 14-day cooling-off period?
It gives you 14 days after agreeing your flat roof job to change your mind and cancel. Apex offer it on flat roofs so nobody signs up under pressure at the kitchen table. Use the time to compare quotes, read the reviews and look over the guarantee before the team starts.
Are flat roofs a bad idea?
No, a modern flat roof lasts for decades when the deck, falls and detailing are right, with EPDM and GRP lasting longest. Old built-up felt lasted far less, which is how flat roofs got a bad name. Modern torch-on felt performs much better than that. Apex fully guarantee their flat roofs, whichever covering you choose.
Which flat roof is best for an extension?
EPDM and GRP suit most extensions best, because both go on without joints across the roof and last a long time. GRP is the better pick if you will walk on it or it has awkward corners. Felt is the cheaper option and the easiest to patch. Patrick looks at the roof, the access and your budget, then recommends one.
Do flat roofs need to be completely flat?
No, a flat roof needs a gentle fall so water runs off to the gutter. Most roofs that pond were laid dead level or have sagged since. On a replacement, the team builds the fall back in with firrings on the joists before the new deck goes down, so water drains away instead of sitting there.
Related services
Flat roofs near you
Flat roof letting you down?
Get a free survey and Patrick will show you the deck and the covering in photos, with 14 days to decide once you agree.