Flat Roofing

Repairs & New Installations

GAC Roofline Ltd - Flat Roof Repairs and new installations

What is a flat roof?

Typically the design of choice for smaller structures, such as garages and extensions, flat roofing consists of a horizontal base which is fixed to the ceiling joists underneath, then a waterproof membrane and finally the roofing material itself, with a choice of felt, RubberCover EPDM or fibreglass.

Traditional Felt Roof

While flat roofs are designed to hold standing water to some degree, a slight pitch of only a few degrees is usually incorporated to enable rainwater to drain away into a gutter/drain.


Replacing a garage roof

Before - the old garage roofing felt showing signs of needing replacing.

During - removing the old felt

Putting the finishing touches to a newly installed felt roof

Felt/mineral roofs are the cheapest of the flat roofing materials.  Over time, our changeable weather conditions will affect the material, it can be repaired and will last for a number of years.  Felt roofing is a popular product for garage and shed roofs in particular.  Other flat roofing materials are also available.  Contact us for more information.

Fibreglass roofs have suffered from a bad reputation in the past due to ignorance and faulty installation. A common mistake was using standard boat resins that couldn’t expand or contract properly, or laying fibreglass onto chipboard or smooth plywood.

These days’ modern resins and correct installation has helped fibreglass become a real contender for a top flight flat roof. Normally laid in a one, or sometimes a two layer jointless finish with factory made trims and coloured to literally any colour.

Firestone Building Products specially designed the Firestone RubberCover EPDM Roofing System for small residential flat roofing applications.

The system is based on high performing Firestone RubberCover EPDM rubber membranes and a limited range of accessories offering a watertight and durable roofing solution.

The Firestone RubberCover EPDM Roofing System is the ideal, durable solution for small residential flat roofs such as: extensions, verandas, dormers, porches, garages, carports, garden sheds, balconies, gutters, trailers.

We use firestone rubber cover for its high performance and top quality.


  • If laid competently, can last for many years
  • The cheapest flat roof option
  • Damage resistant
  • Easily repaired
  • Has good expansion and contraction properties
  • Can last up to 25 years
  • The most expensive material due to its high durability
  • Incredibly resistant to most types of damage
  •     Superior durability
  •     Seamless sheets in 1 piece
  •     Very low life-cycle cost
  •     Flame-free and easy installation
  •     High flexibility and elongation
  •     Environmentally friendly
  •     Recovery of rainwater
  •     Fire resistance