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Company Info
At Diamond Fibreglass, we are proud to be Birmingham’s trusted specialists in fibreglass flat roofing, with over 20 years of industry experience. Our family-run business is dedicated to delivering high-quality workmanship and unrivalled customer care, ensuring every project meets the highest standards from start to finish. We offer a comprehensive range of services including fibreglass (GRP) flat roofing, flat roof repairs, pond lining, cold applied lining, fascias and soffits, guttering services, roof conversions, replacement roofs, roof windows, and storm damage repairs. We also provide Firestone rubber roofing, single ply roofing, and warm roofs, making us a one-stop solution for all your roofing needs.
What sets us apart is our commitment to using only the best resins and fibreglass matting, guaranteeing a seamless, tough, and hardwearing finish that is both slip resistant and cost effective, with a lifespan that ensures long-term value. Every roof we install comes with a 25-year guarantee, giving you peace of mind and confidence in your investment. We have completed over 2,000 flat roof replacements and our expertise extends beyond roofing to include fibreglass pond lining and repairs, so you can trust that your project is in safe hands.
We offer free surveys and now provide finance options to make our services even more accessible. Our customers consistently praise our professionalism, communication, and the quality of our finished work, which reflects our dedication to excellence. When you choose Diamond Flat Roofing, you are choosing a team that specialises exclusively in fibreglass and roofing solutions, ensuring you receive expert advice and results every time
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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!
May 7, 2025
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!
May 7, 2025
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.
May 7, 2025
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!
May 7, 2025
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.
May 7, 2025
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.
May 7, 2025
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
January 31, 2023
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.
January 31, 2023
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.
January 31, 2023
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
January 31, 2023
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!
January 31, 2023
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.
January 31, 2023
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
January 31, 2023
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!
January 31, 2023
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
January 31, 2023