Lee FlecknellEmergency roof repairs, rental property · August 2026
Highly recommend this company carried out some emergency roof repairs on one of my properties would use again.
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Flat roofing · St Albans AL1, AL2, AL3, AL4
Flat roofing in St Albans for extensions, dormers and garages
Flat roofing in St Albans for extensions, dormers and garages, laid in EPDM rubber, GRP fibreglass or torch-on felt. Best Top Roofing Ltd checks the deck, the edges and the drainage before recommending a system, then gives you a fixed written quote. Call 07429 820474 to talk through your roof.
The awkward part of a flat extension roof is often the narrow strip beside the original house. Around the Victorian villas of Granville Road and Stanhope Road, a later addition meets older brickwork and sits within a closely arranged plot. A wall flashing set too low leaves little room for a replacement roof build-up, while an outlet squeezed beside a boundary is difficult to keep clear. Marshalswick's post-war housing brings another practical consideration when a garage or extension is altered: the roof must suit the room beneath it. A heated kitchen needs its insulation and moisture control considered alongside waterproofing. Across both settings, repeated layers over a sagging deck preserve the hollow that holds water instead of correcting the drainage.
We measure the roof, check the outlet level and assess the wall junction before specifying EPDM, GRP or felt. After the agreed strip, we examine the joists and remove unsound decking, supporting new boards properly at their edges. The new base is set to drain, with insulation and vapour control detailed for a heated room. EPDM uses bonded rubber and compatible details at corners; GRP uses a prepared deck, glass reinforcement and resin; felt uses a specified built-up bitumen system. Each option needs its own correct edge and wall treatment. We form the upstands around existing rooflights, finish the flashings and check discharge into the gutter. The access plan includes protecting the garden route and the space beneath the working area.
Bring us the practical problem: a garage that drips onto storage, a kitchen roof holding water or a dormer with worn edges. Thomas can explain the suitable flat roofing options and prepare your free fixed written quote for St Albans. Family members carry out the roofing, with the scope agreed before the job starts. A Google reviewer said their new flat roof was completed exactly as requested and described the team as friendly and polite. That is useful feedback for homeowners choosing a finish, landlords planning maintenance and small businesses arranging building work. We guarantee workmanship and hold full insurance. To arrange a no-obligation visit, ring 07429 820474 during our Monday to Saturday opening hours, 8am to 6pm.
ServiceFlat roofs
AreaSt Albans, AL1, AL2, AL3, AL4
Homes hereVictorian and Edwardian terraces in slate and clay, 1930s semis in plain tiles, 1960s and 70s estates in concrete interlocking tiles
Also coveringFleetville, Marshalswick, Jersey Farm, Bernards Heath, Clarence Park, Sopwell
What flat roofs in St Albans includes
- Rooflights and roof lanterns fitted or re-sealed
- Old covering stripped and the deck checked board by board
- Upstands and flashings where the roof meets walls and windows
- Site cleared and old materials removed
- Firrings added where the roof needs a better fall
- New edge trims, drip details and gutter outlets
Our recent flat roofs work
Photos of our own jobs. Tap to enlarge.
GRP fibreglass flat roof at the laminate stage, before the topcoat goes on
After: the same garage with a new felt flat roof and trims
How it works
Tell us about the roof
Phone or form. Say what you have noticed and send a photo if you can.
Survey
We come to your home or business in St Albans at a time that suits you.
Fixed quote
Clear, written and fixed. It does not change once the scaffold is up.
Work and hand-over
Carried out by the people who quoted it, cleared up and guaranteed.
Flat roofs in St Albans: questions
Can you renew a flat extension roof beside a St Albans boundary wall?
Yes. We measure the wall junction, drainage and available height before choosing the build-up. Tell us about any shared wall or access arrangement. A narrow strip between buildings needs workable waterproofing details and a way to maintain the outlet afterwards.
Should my Marshalswick garage roof change if the room becomes heated?
The roof design needs to reflect the room's use. Waterproofing alone does not address insulation or condensation. Tell us about the proposed conversion at survey stage so the decking, thermal layer and moisture control can be considered together with the covering.
Which flat roof material suits a St Albans kitchen with a rooflight?
EPDM, GRP and felt all have rooflight details. We compare the shape, upstand height, deck and access before recommending a system. A rooflight is not a reason on its own to rule out rubber or insist on fibreglass. Ask for the options in your quote.
Can you fit a roof lantern or rooflight?
Yes. It is the best time to add one, because the roof is open and the upstand can be built into the new covering properly.
Which is best, EPDM, GRP or felt?
EPDM suits most garages and extensions and lasts a very long time. GRP is best where the roof is walked on or has lots of corners and upstands. Felt is the most economical. Our EPDM vs GRP guide compares them side by side.
Other roofing services in St Albans
Reviews
What customers say on Google
Dannie SmithQuoted the next day · June 2026
Thomas came and gave me a quote next day, very professional and clean work was carried out. I will be using best top roofing for all my projects going forward and would highly recommend them.
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R Vidya RLeaking felt roof repaired · September 2026
thanks to Thomas for fixing our roof. It was pleasure working with you. I feel confident that the water leak is accessed from all points and all problem addressed
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Lee SextonNew flat roof · April 2026
I needed a new flat roofing doing and this amazing company did it exactly how I wanted it. Highly recommended. Friendly and polite. Would use and again and tell all my friends and family.
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Mahmoud Al SuwwanRoof problem fixed · August 2026
We had a problem in our roof we called this company and they solved the problem so happy and satisfied. I really highly recommend if anyone needs roofing work done if I ever need a roofer again hopefully we don't if I ever did I will always use this company again, thank you so much, guys.
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Lisa DunneBlocked gutters cleared · April 2026
Cleaned out our gutters as were blocked and overflowing. Very happy with the job done. Thank you very much!
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Ligita KaledaiteChosen over other quotes · July 2026
Very friendly. Had couple of Quotes from other companys And this was the best company for it.
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Sally MaskellRoofing work by Thomas · June 2026
Very impressed with the work that Thomas has done. Definitely recommend.
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Scarlet BullRoofing work · August 2026
Professional, good quality work! Recommended.
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Checkatrade customerBalcony roof installation · August 2026
Fantastic, professional and polite throughout the job.
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Flat roofs in St Albans? Talk to us
Ring or send the form. We come out, look at the roof, show you what is needed and give you a fixed written price. No pressure and no hidden extras.