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Company Info
Diamond Flat Roofing specialises in fibreglass (GRP) flat roofing for domestic and commercial customers in Birmingham. The family-run firm provides GRP installations and repairs, as well as related services including pond lining, cold-applied lining, fascias and soffits, guttering, roof windows and storm-damage repairs. The company specifies resins and fibreglass matting intended to produce a seamless, slip-resistant finish; installations are supplied with a 25-year guarantee. Having completed more than 2,000 flat roof replacements, the business offers free surveys and finance options and also installs Firestone rubber, single-ply systems and warm roof solutions.
- Family-run business with over 20 years’ industry experience
- More than 2,000 flat roof replacements completed
- Free surveys and transparent customer communication
- 25-year guarantee on installations; finance options available
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- Proof of address
- Company trading history
- County court judgement
- Public liability insurance
Reviews
Iain Huxley
I was very pleased with the work completed by Diamond Flat Roof. My problems occurred following the recent storm and though they were obviously very busy they said they would endeavour to fit me in and did! The guys did a great job: were friendly and sympathetic to my questions and surveillance, even though it was very cold. I think the few cups of tea helped!
2025-05-07
Sarah Dowell
Al and his team have just repaired our balcony and they did an absolutely brilliant job! The lads worked tremendously hard in the recent freezing conditions. Very professional, friendly and hard-working team who were a pleasure to have working on our property. We would thoroughly recommend them to prospective customers. Thank you so much!
2025-05-07
joanne welsh
Thanks to Al, Troy and the team for replacing my flat roof. Weather was against us at first but we got there in the end and it was well worth the wait. Great lads, great work and shall be highly recommending to anyone that I hear of that needs roof works. Well done and thanks again.
2025-05-07
Tarlochan Suthi
Aly and his team are the most amazing people ever! Literally sorted my leaking balcony and fixed it when everyone else was scared to go near it! His work is amazing, so humble, very affordable and genuine good hard working people! Can't recommend them enough!
2025-05-07
Christine Harrison
Used this company after looking on the internet for a company specialising in fibre glass roofing. I was a little worried as had not used them before. I could not be more impressed with the results. The lads arrived on time and really got on with the job. They were polite and kept us informed at every stage. I would definitely use again be recommend to anyone looking for a professional outfit who really know their business. All messages were answered immediately, I never had to wonder what was happening. Many thanks to all at Diamond - superb company.
2025-05-07
Gill Taber
Fabulous company. From quote to completed project they were friendly, explained clearly what was needed, and communicated well, both in person and via email. The lads who completed the job were polite, tidy and kept me updated throughout the work. I'd happily recommend them and use them again.
2025-05-07
J Popel
Highly recommend this company, kept in touch through out very professional and we are so happy with end results. Have recommended to others who have also used them and very happy will keep recommended
2023-01-31
David Jones
Over the moon with the fibreglass roof on our new timber frame extension. Alastair and the guys worked so hard over the 2 days they were here. The roof looks great and I have no hesitation in recommending them.
2023-01-31
Simon J
Great company who really care about customer service and maintaining their deserved reputation. The quality of their work is exemplary, with good attention to detail. The best bit is that the whole team share the company ethics and really do put in the effort, demonstrating real pride in their work. We will definitely be using them again when our other flat roofs need upgrading.
2023-01-31
Lee W
Its rare to find a company that has so much passion & pride in what they do. Al and his team stripped down my old felt roof and replaced with GRP and an Atlas roof lantern. From start to finish the team worked very very hard and exceeded all my expectations. Everyone is very friendly and has a great sense of humour. I cannot give enough credit for the work completed. Thank you so much i am so pleased with the new roof, you're one of a kind and hard to find
2023-01-31
Lesley Carr
Great service from this company who very quickly sorted out an issue we had with the valley on our roof. Excellent job and would thoroughly recommend!
2023-01-31
Baljit Basra
Most Professional roofing company. Al and his team re-roofed my Orangery and Garage roof which was done in-correctly by a builder. Adam ,Sam and Troy are Perfectionists at what they do. They finished the job to a very high standard of work.
2023-01-31
Fatfishy
Second time we've used Diamond - this time for replacing an old felt flat roof with fibreglass and installing new fascias and gutters. Responded quickly to our request (urgent as large holes in old roof), and carried out the work quickly, professionally and ran a good clean work site. Happy to recommend
2023-01-31
P Kaur
Ally, Adam and the entire team worked endlessly to help fix our flat roof. Second to non customer service, whereby the entire team did not stop until the roof was completely repaired. I am extremely impressed with the service - they handled the project professionally and on time within budget. I would highly recommend Diamond Fibreglass for any roof repairs. Thank you!
2023-01-31
Michael Barrows
Ali and his team were brilliant - very friendly but extremely professional and hard working. They did an excellent job installing our new roof. They worked really quickly and cleared up really well at the end. The best part was that it rained heavily (for the first time in days) about an hour after they left - no leaks! Highly recommended
2023-01-31