UK wide specialists in fibre glass flat roofing At Proplas we specialise solely in fibreglass roofing and with 27 years of industry experience are able to deliver the highest quality flat roof system available. In addition to our experience and technical knowledge, we use a heavier grade fibreglass mat than is industry standard. This enables us to guarantee our roof systems for 35 years, though it will last many more. Why use Fibre Glass? Fibreglass is the superior choice for creating maintenance free flat roofs. A roof generally takes one day to install, has a 35 year transferable guarantee, and usually will last a lot longer. It gives you the peace of mind that you no longer have to worry about the problems of leaking and bubbling generally associated with flat roofs. The material is strong enough to be walked upon, giving customers the opportunity to make use of their roof space. A range of colours is also available, ensuring we can combine a desirable look with a material which out-performs all its rivals.