Tel. 07977587660

Email. [email protected]


MAG Roofing and Building,

26 Colley Crescent,

Barnsley, South Yorkshire

Call us: 0800 073 0243      

            0797 758 7660


Roofing and Building

Glass reinforced polyester (GRP) was discovered in the 1940's used for a wide range of applications with it's high strength and excellent appearance. It has now become the standard material in construction due to the waterproof coatings.

Topseal is one of the largest and longest established GRP roofing companies in the country and was first to offer a BBA approved GRP roofing system.

It can be adapted for any application such as balconys, ponds, pitched roofs and and gutters. It is only installed by a national network of trained and approved contractors. Topseal can be finished in any colour from our chart with a range of textures.


Topseal systems have a very long life and are maintance free. They're installed with a 25 year guarantee.


Proven performance in demanding conditions and are easy to repair in the unlikely event it is damaged.


Topseal roofs cannot be cut with a knife and are fire redundant to Class 1 if required.



Topseal GRP Flat Roofing

Why choose Topseal?