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PVC Cladding UK£49.74Visit shop Cromar Grp Roofing Collar Rainwater Outlet - 68Mm
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The GRP Roofing Collar Rainwater Outlet (68mm) is an essential component for roofing contractors and DIYers looking to achieve a professional, weather-tight finish on GRP flat roof drainage systems. Designed specifically to integrate with standard 68mm downpipes, it ensures a secure, leak-free transition from the roof deck to the drainage network. While it provides excellent durability and seamless integration with the ProGRP system, it requires precise installation and specialized resin application to maintain its waterproofing integrity.
| Model Part Number | GA117/PIPE |
|---|---|
| Brand | Cromar |
While it is designed for the ProGRP system, it can be used with other standard GRP roofing systems provided that the resin used is compatible with GRP materials.
This product is specifically designed for flat roof drainage applications where the collar can be integrated into the horizontal GRP laminate.
You will need standard GRP application tools, including a laminating roller, brushes, appropriate resin, and glass fiber matting.
No, it is designed to be bonded using standard GRP roofing resin to ensure a structural, leak-proof seal.
The collar is sized for a standard 68mm diameter rainwater pipe.
Check that the GRP laminate covering the flange is intact and free of pinholes or air gaps; re-apply resin if necessary.
Verify that the pipe is indeed 68mm and clear of burrs or deformed plastic edges that may obstruct the fit.
To install, ensure the roof surface is clean, dry, and free of debris. Position the collar over the drainage hole, ensuring a flush fit with the deck. Apply the GRP resin and glass matting over the flange of the collar, working the resin thoroughly into the fibers to eliminate air pockets. This unit is explicitly compatible with the ProGRP trim system. For maintenance, check the outlet annually for blockages, such as leaf debris or organic matter, and inspect the surrounding laminate for any signs of cracking or degradation that may require a quick resin patch.
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