Flat Roofing Services
EPDM rubber, GRP fibreglass, torch-on felt and liquid-applied flat roof systems across Kent, Sussex and Surrey.
About Our Flat Roofing Services
Flat roofs are found on extensions, garages, dormers, bay windows and an increasing number of modern homes across the South East. While they offer clean lines and practical use of space, flat roofs demand specialist materials and installation techniques to remain watertight. A poorly installed or ageing flat roof is one of the most common sources of leaks and damp in residential properties — and the damage often goes unnoticed until it has spread to timber, plaster and insulation.
Radiant Roofing provides a complete flat roofing service, from repairs and patch work through to full replacements and warm roof conversions. We work with all modern flat roofing systems including EPDM rubber, GRP fibreglass, torch-on felt and Restec liquid-applied waterproofing. Each system has distinct advantages, and we will recommend the most suitable option for your property, usage and budget during a free survey.
If your flat roof is blistering, cracking, ponding water or showing signs of age, do not wait for a leak to develop. Early intervention is almost always cheaper than repairing the water damage that follows a failure. Contact us for a free, no-obligation assessment and we will give you an honest appraisal of your options.
Our Flat Roofing Services
Flat Roof Repair
Blisters, cracks, splits and failed joints repaired quickly. We identify the root cause and carry out a lasting repair using materials compatible with your existing roof system.
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Flat Roof Replacement
When repairs are no longer cost-effective, we strip back to the deck and install a brand-new flat roof system. Full replacements include new insulation, decking where required and a 20-year-plus covering.
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GRP Fibreglass Roofing
A seamless, hard-wearing fibreglass system that is ideal for balconies, walkways and areas that need to withstand foot traffic. GRP roofs are laid in a single sheet with no joints to fail.
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Warm Roof Conversion
Upgrade your cold flat roof to a modern warm roof system. Insulation is placed above the deck, eliminating condensation problems and significantly improving energy efficiency.
Learn more →Flat Roofing Systems We Install
We supply and install all major flat roofing systems. Each has specific strengths, and we will advise on the best choice for your property during your free survey.
EPDM Rubber
A highly durable single-ply rubber membrane that is one of the most popular choices for residential flat roofs. EPDM is flexible, UV-resistant and easy to maintain.
Key Benefits
- Expected lifespan of 30–50 years
- Single-sheet installation with no seams on most domestic roofs
- Excellent flexibility — expands and contracts with temperature changes
- Low maintenance and resistant to UV, ozone and weathering
Why Choose Radiant Roofing?
Flat Roofing Specialists
Flat roofing requires specific skills that differ from pitched work. Our team is trained and experienced in all modern flat roof systems, from single-ply membranes to fibreglass layup.
Quality Materials & Systems
We only install flat roofing systems from manufacturers we trust, including Firestone, Cure It, and Restec. Every system comes with a manufacturer-backed product guarantee in addition to our own workmanship warranty.
Accredited & Insured
Radiant Roofing is Checkatrade verified, a member of the Guild of Master Craftsmen and fully insured. Our consistently high ratings reflect the quality of our flat roofing work across the South East.
Long-Term Guarantees
All flat roofing work is backed by our written workmanship guarantee — typically 10 to 20 years depending on the system installed. We stand behind every project we complete.
Our Flat Roofing Work
What Our Customers Say
Verified Google ReviewsJane S.
Kent
They were very friendly, professional and polite and left the site immaculate at the end of the day. I would thoroughly recommend them to others. The work was carried out to a very high standard.
Peter B.
East Sussex
Excellent work, highly recommended! Very knowledgeable, by far the best roofing company we have ever used and super nice guys.
Sarah M.
Surrey
Radiant Roofing completed our roof repair quickly and professionally. Great communication throughout and a fantastic result.
Frequently Asked Questions
The cost depends on the size of the roof, the system chosen and the condition of the existing deck. As a rough guide, a typical garage flat roof replacement costs between £1,500 and £3,000, while a larger extension roof may range from £3,000 to £6,000 or more. GRP and EPDM systems sit at the higher end but offer significantly longer lifespans. We provide free, itemised quotations so you can compare options clearly.
There is no single best system — it depends on your property, usage and budget. EPDM rubber is excellent for most residential roofs due to its durability and flexibility. GRP fibreglass is the best choice if the roof will be walked on regularly. Torch-on felt offers good value for garages and outbuildings. During your free survey, we will recommend the system that best suits your specific situation.
Most residential flat roof replacements are completed within one to three days, depending on the size and complexity of the roof. A simple garage roof can often be done in a single day, while a larger extension with warm roof insulation may take two to three days. We always confirm the timeline before work begins.
Yes, warm roof conversions are one of our most popular services. We add rigid insulation boards above the existing deck, raising the roof height slightly, then install a new waterproof covering on top. This eliminates condensation, improves energy efficiency and can make a noticeable difference to heating bills. Building regulations now require minimum insulation values for flat roof replacements, and a warm roof is the most effective way to achieve them.
We cover the whole of Kent, Sussex and Surrey, including Tunbridge Wells, Sevenoaks, Tonbridge, Maidstone, Crawley, East Grinstead, Haywards Heath, Reigate and the surrounding areas. If you are unsure whether we cover your location, give us a call and we will be happy to confirm.
Yes. All flat roofing work carried out by Radiant Roofing is covered by our written workmanship guarantee. In addition, most of the systems we install carry manufacturer-backed product guarantees — typically between 15 and 25 years depending on the system. We will explain exactly what is covered before work begins.
Ready to Get Started?
Whether it's a repair, replacement, or a brand new roof — get in touch today for a free, no-obligation quote.
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Contact Information:
Mobile (24/7): 07753 165 005
Landline (Office Hours): 01892 356 967
Email: contact@radiantroofing.co.uk
Head Office:
Address:
Alpha House
Crowborough Hill
Crowborough
TN6 2EG
Opening Hours:
Monday to Friday: 7:30 am – 6:00 pm
Saturday: 7:30 am – 12:00 pm
Sunday: Closed (mobile still available)
Our Mobile and Email is available 24/7