Flat Roofs

Thompsons Roofing: Approved Contractors of GRP Fibreglass Systems

The ultimate stylish flat roofing system, with a building 25 years guarantee. With a 25 year product and craftsmanship guarantee, GRP Fibreglass Systems represents the ultimate stylish and practical flat roofing system that money can buy. Developed and manufactured in the UK by a leading team of scientists and product engineers and installed by fully trained and approved installers all over the UK, a GRP Fibreglass System is designed to provide complete waterproof protection for 100 years or more, with more than 1000 different combinations of colours, styles and finishes available, your finished GRP Fibreglass System installation will provide a sense of perfection and style only GRP Fibreglass System can deliver, whether it's a small dormer or porch, new-build green roof, historic building or iconic cutting-edge architecture, GRP Fibreglass System's versatility will ensure that it fits in seamlessly with your plans.

GRP Fibreglass System quality promise is second to none. Support is provided by a UK-based customer & technical support team, plus an extensive network of highly trained and approved GRP Fibreglass System installers. With GRP Fibreglass Systems, you're guaranteed to have the ultimate flat roof in the UK and one which will stand the test of time.

Seamless and completely reliable

Most residential flat roofs are straightforward rectangles. This means we can install a single sheet of EPDM rubber to cover your roof so you don't have to rely on seams to waterproof it. Sheet size can be cut to fit your residential roof in just one piece. We have various roll sizes available.

Low cost best material and eco-friendly too

The installed prices of your roof will probably be similar to that of a quality felt roof and significantly lower than other "newer" systems. So you can have a flat roof to rely on at a fair price and also be very "green".

For example, the conclusion of a reports by ACTAC (The Association of Community Technical Aid Centres Ltd) named EPDM as the best buy roofing membrane due to its low environmental impact in comparison to other membranes, high durability and re-usability.

Low maintenance costs

There should be no reason to maintain an EPDM rubber roof. So long as the deck can withstand more weight you can even use EPDM rubber roofs as a garden or you can install paving or decking over it. All you will have to do is wipe clean the edge trim now and again.

Never perishes and remains flexible.

EPDM rubber is UV and ozone stable so it never perishes. It stays flexible and can move with the building unlike static installation systems.

Successful in very cold and hot climates

Rubber is installed successfully in Alaska and in the Middle East - so UK weather is never a problem.


  • 10 year guarantee on workmanship
  • 20 year guarantee on warranty
  • 50 year life expectancy


Felt roofing is just one of the many options that you have when you need to replace or install your roof. It is made up of a few key components including bitumen which gives the product rigidity, tear resistance and a base product that is used to help with it being waterproof.

Benefits of Felt Roofing
One main benefit of this Felt roofing is that they move with the structure which means that they are less likely to break or tear under the light stress that may be cause as a new house is settling. As bitumen is a key component in the felt material it goes it added rigidity and makes such it does not absorb water or allow water to pass through.

Felt roof products also have a long lifespan if properly maintained by just occasionally checking to make sure that there aren’t any leaks or holes in the material. As they are made in certain lengths and widths then overlapped to maintain integrity they can be applied on any size of roof, small or large.

What Type to Use?
When you are choosing what type to use make sure you go for a heavy duty felt to make sure it has a long term weatherproofing effect. It usually comes in 2 different ratings, 15 pounds or 30 pound and the 30 pound one is twice is strong. If you are only covering something light such as a shed, the 15 pound covering may be sufficient for your needs.

If the roof felting does happen to tear or rip then all you have to do is cut a piece that is large enough to cover the problem area. Make sure that there is a lot of room to overlap and then nail or stick it into place with adhesive and that should help quickly prevent any further leaks. Also remember that when you are doing the repair to not stand on the new piece of felt or any unsecure sheets as it can slide and cause you to fall off the roof and may result in injury.