Flat roofing in St Albans for extensions, dormers and garages
Flat roofing in St Albans in felt, GRP fibreglass, EPDM rubber and single-ply, for rear extensions, loft dormers, garages and commercial roofs. Ring 07310 120341 and Kieran comes out, checks the deck and gives you a free written quote.
St Albans has more flat roofs than you see from the street. Box dormers on terrace loft conversions in Fleetville and Bernards Heath, kitchen extensions across the back of semis in Marshalswick, garages on the newer estates, and the shops along Hatfield Road and London Road all drain off a flat or nearly flat roof.
A felt flat roof gives warning before it fails: blisters, cracks at the edges and upstands, and puddles that sit for days after rain. Once water gets through it soaks the deck, and a soft deck under a new covering will fail again. That is why Kieran checks the boards before he quotes, and replaces any rotten decking before a new roof goes on.
Then you choose the covering. Torch-on felt costs least to lay. GRP fibreglass gives a hard, jointless finish that suits dormers and roofs you walk on. EPDM rubber goes on in one sheet with no joints to leak on most domestic roofs. Single-ply membrane suits bigger and commercial roofs. Kieran tells you which suits yours, fits new trims and sets a proper fall to the gutter.
Homes hereVictorian and Edwardian terraces in slate and clay tile, old clay tile and slate roofs in the city centre conservation area, 1930s to 1960s semis, 1970s and 80s estate houses
Also coveringFleetville, Bernards Heath, Marshalswick, Jersey Farm, St Peter's, St Michael's
Phone, WhatsApp or the form. Say what you have noticed and send a photo if you can.
A look at the roof
We come to your home in St Albans at a time that suits you.
Free quote
Written and clear, with the guarantee on it.
Work and hand-over
Carried out by our team, cleaned up and guaranteed.
Flat roofing in St Albans: questions
How much does a new flat roof cost in St Albans?
In Hertfordshire, a new flat roof on a single garage or porch costs about £1,000 to £2,500, and on a single-storey rear extension of 15 to 20 square metres about £2,000 to £4,500. Size, material and the state of the deck set the price, and Kieran puts his in writing first.
Felt, GRP or EPDM: which is best for my extension?
EPDM rubber and GRP fibreglass both outlast felt, and both suit an extension. GRP is best where you walk on the roof or need a neat finish round a roof window; EPDM is quick to lay with no joints. Felt costs least up front.
Can you fix a leaking dormer roof on a loft conversion?
Yes. Small splits are repaired. If the felt has failed across the dormer, it is stripped and relaid in felt, GRP or EPDM, with new lead where the dormer meets the main roof.
How long does a flat roof take?
Most extension and garage roofs take one to two days. Bigger roofs take longer.
Felt, GRP, EPDM or single-ply: which is best?
Felt is the toughest for the money. GRP gives the neatest hard finish. EPDM goes on as a single sheet with no joints across the roof. Single-ply suits larger and commercial roofs. Kieran recommends one once he has seen your roof.
Outstanding roofing company! I honestly can’t recommend KR & Sons Roofing & Guttering Ltd enough. From the first contact, they were friendly, professional and extremely helpful. The whole team worked incredibly hard and the standard of their workmanship was brilliant. They were reliable, tidy and kept me informed throughout the job, and the finished roof looks absolutely fantastic. It’s not often you come across a company that takes this much pride in their work. I’m extremely happy with the result and would have no hesitation whatsoever in recommending them to family, friends or anyone looking for a top-quality roofing company. Fantastic team, fantastic workmanship and a fantastic service from start to finish!
Excellent repair work complete by KR & Sons Roofing. Good communication throughout and work completed in a timely manner. Work finished below the quoted estimate. Highly recommended and trustworthy company.
JJessBlocked gutter, terraced house · January 2026
Came to have a look at a blocked gutter on our terraced property. Turned up on time, was friendly and identified the problem and took time to explain to us the options. Really grateful - thank you so much!
I had a great experience with [kr&sonsroofingandgutteringltd]! From start to finish, their team was professional, punctual, and highly skilled. The quality of the materials and workmanship exceeded my expectations. They completed the job on time, kept the area clean, and made sure I was happy with every detail. I highly recommend them to anyone looking for reliable and high-quality roofing work.
Great quality work, effective clean up after and efficient communication throughout. Really good to get the run down of the work as it went along, and assurance with a gaurantee at the end
Highly recommend! Had an issue with my roof flashing after a storm, he was very quick to come out and have a look/quote. Work was carried out the following week and a further issue was found after work started, was very generous in supporting me with the added cost!
