Chopped Strand Mat 600g Full Roll (55 metres)

600g Chopped Strand Mat (CSM) is a heavy-duty reinforcement used within GRP fibreglass roofing systems where additional laminate strength and durability are required. Manufactured from E-glass fibres randomly distributed and bonded together with an emulsion binder, the mat forms the structural reinforcement layer when laminated with polyester roofing resin.

The 600g grammage refers to the weight of glass fibres per square metre of matting. In GRP roofing systems, the structural strength of the finished laminate comes from the combination of chopped strand glass reinforcement and polyester resin, as resin on its own becomes brittle once cured.

Compared with 450g chopped strand mat, the 600g version produces a stronger laminate, making it suitable for installations where additional reinforcement or durability is required.

The consistent fibre distribution allows for efficient wet-out and good resin penetration, helping installers consolidate the laminate and reduce trapped air during installation.

As a general guide for roofing laminates, installers typically use approximately 2kg of resin per m² when laminating with 600g chopped strand mat, including an allowance for normal installation wastage.

This 600g Full Roll of chopped strand mat is supplied in a 55 metre roll, making it ideal for larger roofing installations where maximum coverage and best value per metre are required. Full rolls are also convenient for installers who regularly carry out GRP roofing work and can be stored indefinitely when kept dry.

Sizes Available

600g chopped strand mat is available in multiple sizes to suit different project requirements:

• Full Roll – 55 metres

• Half Roll – 27.5 metres

• Quarter Roll – 13.75 metres

• Cut per metre available