Grp Products are fairly straightforward to use, you don't need any special qualifications to apply GRP. we would suggest watching the installation guided videos prior to starting your project.

GRP Topcoat mixed with water isn't likely to cure hard any time soon. We strongly advise against Topcoating unless you know there's a good dry weather window ahead of your scheduled start date.

This one is a No No No, your GRP Materials would be scrap, CSM (Chopped Strand Mat) contains emulsion bound materials. Water will simply ruin the binding agent in the matting, turning it chalky white. The material is likely to fall to pieces when damp or wet. Store this item in a dry warm place.

If your boards got wet there's a possibility the joints in the OSB Tongue & Groove may swell up


1kg Resin or Topcoat @ 1% is 10ml

1kg Resin or Topcoat @ 2% is 20ml

1kg Resin or Topcoat @ 3% is 30ml

1kg Resin or Topcoat @ 4% is 40ml


You can now Fibreglass over felt with a System we have called Tekguard

Flexible Fibreglass roof kits

Flexible GRP Fibreglass kits

The all-new advanced way to FIbreglass a roof, the option to overlay existing roof surfaces have become a popular choice for our database of roofers as well as DIY users. This system is so advanced the results are outstanding, even when overlaying onto existing felt. the GRP finish is solid hardwearing, dark grey & seamless. We offer 3 grades of fibreglass to suit your specification and budget.


BUY NOW https://www.resiroofgrp.co.uk/flat-roofing-kits/fibreglass-roof-kits

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Welcome to ResiRoof® A Premier GRP Fibreglass Roofing System.

Composite Roof Supplies Ltd are a leading supplier of GRP Roofing Kits in the UK, there aim was to launch a complete system to both Trade and DIY users.

By offering clarity on this system it's easy to understand what's required when making a purchase. 

We kept things simple with a Premier base model 450g/m² Dark Grey Fibreglass roof kit alongside our Premier 600g/m² Roof Kit (yet to be launched), both kits have either 20year or 25year manufacturer's warranty.

The design aspect of ResiRoof ensures any one of our customers can easily understand which component is used at each stage of construction with very little experience. Each product will show base instructions with key factors to take into consideration for a successful finish which when complete looks superior and will last our lifetime.

ResiRoof Grp (Glass Reinforced Plastic) can be used for almost any roof type, Flat or vertical GRP has a history of great success when keeping the rain outside OUTSIDE!.

Roofing Resin designed for ultimate flexibility, A key component in the 1st stage of laminating your new GRP Roof, this layer will be watertight in its own right, when combined with chopped strand matting, strength and flexibility is unrivalled. Clean, pure Virgin Grade Quality.

Fibreglass Roofing Top. Once applied this product creates a UV Resistant, hard wearing surface designed to withstand harsh weather the UK has to offer. Iron Grey (Ral 7011) in colour. Not only aesthetically pleasing on the eye this colour never gets old or outdated. Simply brush or roller applied with the addition of catalyst.

Without the addition of Catalyst, Resin & Topcoat will not cure rock solid. Our kits include either standard activity or winter activity, depending on the weather, and of course assuming its dry, we´ve got you covered. Each GRP Roof kit will include a measuring cup.

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Contact Us 02071013977 for Technical Support


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