Glass Fibre Roof Building Guide

Step by step guide to GRP roof building

MATERIALS/TOOLS REQUIRED

* May not be required

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Step by Step GRP Roof Building Guide

Step 1

Cut fibreglass matting into 1m squares or long strips for ease of use
Ensure that your catalyst is in a dispenser ready for measuring.
Ensure that all tools and materials are at hand (see list in Tips before starting)

Step 2

If using plywood or OSB boards ensure that you nail or screw down securely.
Sand down and fix trims and corners where required.

Step by Step Fibreglass Roof Building Guide

Step 3

Mix Approximately 2kg of resin with the correct ratio of catalyst (approx. 10-20 ml Catalyst per 1kg Resin) depending on weather conditions.

Step 4

Working with 2m square of area using a brush or paint roller apply a thick coat of catalysed resin to your prepared surface.
Immediately lay the matting to the wet surface. Using a brush apply more resin.
Once the matting is totally wetted out (you will need to use approx. 1kg resin to 1m square of matting) proceed to the next step.

Step 5

You are now ready to repeat the procedure with the second layer.
You should always stagger overlaps of matting to avoid a section becoming too thick.
Coat the second layer of matting with resin and, using a metal roller, consolidate the 2 layers eliminating any trapped air and wrinkles.
For large areas we suggest you use an extension handle in your roller to avoid constant stooping and stretching.

Step 6

Move across to the next area and repeat steps 4 and 5, ensuring that the joints in each layer are overlapped by the succeeding layer.

Step 7

Allow to harden for approx. 2 hours before applying Flow Coat

Step 8

Applying the Flow Coat. This needs to be applied soon after the newly fabricated structure is 'hardened' to ensure a good bond. The Flo-Coat will provide the UV stable 'weather' or 'wear' suface.
Mix approximately 2kg of Flow Coat with the catalyst (approx. 20ml - 30ml of catalyst PER KILO of flow coat).
Paint the catalysed flow coat to the surface of the whole roof with a large paint brush or roller (you should aim for 600g - 750g of flow coat to 1m square).

Step 9

If an aggregate finish is required it can now be applied (while surface is still wet)

Step 10

Roof should be dry and ready to stand on within approx. 3 hours depending on weather conditions.

Note: Plywood or OSB boards can be pre-primed with resin if rain is forecasted to prevent water ingress to the surface.

TEL: 01268 696094 EMAIL: support@cyb-glassfibre.co.uk

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