Flat Roofs
Flat Roof Installation & Repair Across Hampshire, Surrey & Berkshire
From garage roofs and extensions to dormers and porches, Thermoshield Ltd installs and repairs flat roofs using modern, long-lasting materials — including GRP fibreglass, EPDM rubber, liquid systems, and high-performance felt. All work fully guaranteed.
Need a Flat Roof Installed or Repaired? Get a Free Quote Today
Whether you need a brand-new flat roof or a repair to an existing one, our team will visit your property, assess the best solution, and provide a clear, written quotation — completely free of charge. Call 07505 262511 or use the button below.
Expert Flat Roofing Solutions Built to Last
Flat roofs are one of the most common roofing types across Hampshire, Surrey, and Berkshire — found on extensions, garages, dormers, porches, bay windows, and an increasing number of modern new-build properties. While older flat roofs built with traditional felt often suffered from a reputation for short lifespans and persistent leaks, today’s flat roofing systems are a different proposition entirely. Modern materials such as GRP fibreglass, EPDM rubber, and liquid-applied membranes deliver exceptional durability, weather resistance, and minimal maintenance — with many systems lasting 25 years or more when properly installed. Thermoshield Ltd has been installing and repairing flat roofs across Fleet, Camberley, Farnborough, Bracknell, and the wider tri-county area for over 20 years, and we bring that expertise to every project regardless of size.
Choosing the right flat roofing system depends on the structure of your property, the use of the area below, your budget, and how long you want the roof to last. Our experienced team will survey your property, discuss the options with you in plain English, and recommend the most suitable system for your specific situation. We install all major flat roofing systems — from high-performance GRP fibreglass for extensions and dormers to cost-effective felt systems for outbuildings and sheds. We also carry out flat roof repairs across all material types, tackling issues such as ponding water, blistering, failed joints, and membrane splits. Every flat roof we install or repair is fully guaranteed, and our workmanship is backed by our Checkatrade membership and over two decades of local experience.
Our Flat Roofing Services
We install and repair all types of flat roofing systems, using high-quality materials from trusted manufacturers. Whether you’re replacing an old felt roof on a garage in Wokingham or installing a new GRP system on a rear extension in Farnham, we have the right solution for your property and budget.
GRP Fibreglass Roofing
GRP (Glass Reinforced Polyester) fibreglass is one of the most popular and durable flat roofing systems available today. It creates a single, seamless, fully waterproof membrane across your entire roof with no joints or seams to fail. GRP is exceptionally strong, resistant to UV damage and foot traffic, and typically lasts 25 years or more with minimal maintenance. It’s our most recommended system for extensions, dormers, and balconies across Hampshire, Surrey, and Berkshire.
EPDM Rubber Roofing
EPDM (Ethylene Propylene Diene Monomer) is a high-performance synthetic rubber membrane that offers outstanding weather resistance and flexibility. It performs well in both extreme heat and freezing temperatures, making it ideal for the variable British climate. EPDM is lightweight, quick to install, and provides a long-lasting waterproof finish. A popular and cost-effective choice for garage roofs, porches, and outbuildings across Fleet, Hook, Yateley, and surrounding areas.
Rubber Roofing
Rubber roofing is a broad term covering several membrane-based flat roofing systems, including EPDM and other synthetic rubber products. These systems are valued for their flexibility, durability, and resistance to cracking, splitting, and UV degradation. Rubber roofs are particularly well suited to flat and low-pitch structures where traditional materials may not perform as well. We install rubber roofing systems across all of our service areas, including Camberley, Sandhurst, Crowthorne, and Bagshot.
Liquid Roofing Systems
Liquid-applied roofing systems use a cold-applied resin or polyurethane coating that cures to form a seamless, fully bonded waterproof membrane. They are especially effective for flat roofs with complex shapes, multiple penetrations, or difficult-to-access areas where sheet membranes are harder to install. Liquid systems can also be applied over existing roof coverings in some cases, reducing waste and installation time. Available across Bracknell, Wokingham, Ascot, Windsor, and all surrounding areas.
Felt Roofing
Felt roofing remains one of the most widely used flat roofing materials in the UK, and modern high-performance torch-on felt systems offer significantly improved durability and weather resistance compared to older pour-and-roll methods. Felt is a cost-effective solution for sheds, outbuildings, garages, and other structures where budget is a primary consideration. We install and repair all types of felt flat roofs across Farnborough, Aldershot, Lightwater, Basingstoke, and beyond.
Flat Roof Repairs
If your existing flat roof is leaking, blistering, ponding water, or showing signs of wear, a professional repair can often extend its life by many years without the cost of a full replacement. We repair all flat roof types — GRP, EPDM, rubber, liquid, and felt — diagnosing the root cause of the problem and carrying out a lasting fix. Emergency flat roof repairs are also available across Hampshire, Surrey, and Berkshire.
Flat Roof Replacement & Overlay
When a flat roof has reached the end of its useful life, a full replacement is the most cost-effective long-term solution. We strip the existing covering, inspect and repair the timber deck and joinery beneath, and install a new system built to last. In some cases, an overlay — applying a new membrane directly over the existing roof — may be possible, saving time, cost, and disruption. Our team will advise on the best approach for your property during your free survey.
Need a Flat Roof Installed or Repaired? Get a Free Quote Today
Whether you need a brand-new flat roof or a repair to an existing one, our team will visit your property, assess the best solution, and provide a clear, written quotation — completely free of charge. Call 07505 262511 or use the button below.
Looking for a Flat Roof That Lasts? Talk to Thermoshield
We install and repair flat roofs using high-quality materials designed to protect your property for decades. Every job is fully guaranteed and backed by over 20 years of local experience. Contact us today for your free, no-obligation quote.
F. A. Q
Frequently Asked Questions About Flat Roofs
Thinking about a new flat roof or need an existing one repaired? Here are the answers to the questions our customers across Hampshire, Surrey, and Berkshire ask most often. If you need further advice, call us on 07505 262511.
The best material depends on your property, budget, and how long you want the roof to last. GRP fibreglass is our most recommended system for extensions and dormers due to its seamless finish and 25+ year lifespan. EPDM rubber is an excellent cost-effective alternative, particularly for garages and porches. During your free survey, we’ll explain the pros and cons of each system and recommend the best option for your specific situation.
A well-installed modern flat roof can last 25 years or more depending on the material used. GRP fibreglass and EPDM rubber systems typically offer the longest lifespans, while high-performance felt roofs generally last 15 to 20 years. The lifespan also depends on factors such as the quality of the installation, the underlying deck condition, and how exposed the roof is to the elements.
The cost varies depending on the size of the roof, the material chosen, the condition of the existing deck, and access requirements. Every property is different, so we provide free, no-obligation quotes tailored to your specific needs. Contact us on 07505 262511 to arrange a free survey.
Common causes of flat roof leaks include failed joints and seams, blistering or cracking of the membrane, ponding water caused by poor drainage or sagging, and deterioration of flashings where the roof meets walls or upstands. We carry out thorough inspections to identify the exact cause of your leak and carry out a lasting repair, rather than just patching over the symptoms.
In many cases, a well-targeted repair can extend the life of your flat roof by several years. However, if the membrane is extensively damaged, the deck beneath has deteriorated, or the roof has been patched multiple times before, a full replacement is often more cost-effective in the long run. We’ll always give you an honest assessment and explain both options clearly.
GRP stands for Glass Reinforced Polyester. It’s a flat roofing system that involves laying a fibreglass mat over the roof deck and applying a polyester resin that cures to form a single, seamless, fully waterproof shell. It’s extremely durable, UV-resistant, and can be finished in a range of colours. GRP is widely regarded as the gold standard for domestic flat roofing.
In most cases, replacing a flat roof on an existing structure does not require planning permission as it is considered a repair or maintenance. However, if the work involves changing the height or shape of the roof, or if your property is in a conservation area or is a listed building, you may need approval. We can advise you on this during your free consultation.
We install and repair flat roofs across Hampshire, Surrey, and Berkshire — including Fleet, Farnborough, Camberley, Farnham, Aldershot, Bracknell, Ascot, Hook, Sandhurst, Wokingham, Crowthorne, Windlesham, Basingstoke, Windsor, Yateley, Maidenhead, Lightwater, Bagshot, and all surrounding areas. Call 07505 262511 for a free quote.
