ProGRP External Corner - 3mtr

Best current price£18.43from Professional Building Supplies
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Cromar External Corner - 3Mtr
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Best current price£18.43from Professional Building Supplies
Shopping.co.uk recommended and popular offers
Cromar External Corner - 3Mtr
Visit shop2 offers from £18.43
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The ProGRP External Corner (3mtr) is designed for professional roofing contractors and DIY enthusiasts who require a high-quality, pre-formed finishing solution for flat roofing projects. Its primary benefit is the ability to provide a seamless, weather-tight finish on external angles, copings, and upstands, significantly reducing installation time compared to site-fabricated alternatives. A key caveat to consider is that the material is rigid and requires careful measurement and cutting to ensure a precise, clean fit during the roof edge detailing phase.
| Series | ProGRP |
|---|---|
| Model Part Number | EXT/195 |
| Brand | Cromar |
Yes, it can be painted with high-quality exterior-grade masonry or specialized GRP coatings, but it is typically supplied in a finished state.
Use a fine-tooth hacksaw for manual cutting or an angle grinder with a cutting disc for faster, cleaner cuts.
Yes, you should use standard polyester roofing resin along with glass fiber reinforcement tape (bandage) to ensure a chemically bonded, waterproof seam.
Yes, the ProGRP system is robust enough for both residential and commercial flat roofing applications.
Due to the length and rigidity, it is recommended to have two people carry the trim to avoid bowing and potential snapping.
Check that fixings are spaced no more than 300mm apart and that the trim is properly bedded into the adhesive layer.
Ensure that the GRP bandage has been fully saturated with resin and that there were no air bubbles trapped during the lamination process.
Check the timber substrate for levelness; if the substrate is uneven, use a plane or packing shims to create a flat surface for the trim to sit on.
To install, ensure the timber decking substrate is clean, dry, and free of debris. Measure your roof perimeter accurately and cut the GRP trim using a fine-tooth hacksaw or angle grinder with a diamond blade for a smooth edge. Fix the trims using stainless steel nails or screws spaced at 300mm intervals. Always ensure the trim overlaps the roof deck by the recommended distance to maintain a proper drip line. For care, inspect the roof perimeter annually for signs of damage; if the surface coating becomes worn or chipped, lightly sand the area and apply a fresh topcoat of GRP resin to maintain weatherproofing.
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