GRP Roofing Simulated Lead Flashing - C100C

Simulated lead flashing is a great and cost-effective alternative to a regular lead flashing. Thes...

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Professional Building SuppliesCromar Grp Roofing Simulated Lead Flashing - 3Mtr
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PVC Cladding UKCromar Grp Roofing Simulated Lead Flashing - 3Mtr
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Product Information

Full details

The Cromar GRP Roofing Simulated Lead Flashing (C100C) is an ideal solution for professional roofers and DIY enthusiasts looking for a durable, cost-effective alternative to traditional lead flashing on flat roof installations. It provides a clean, aesthetic finish that mimics the look of lead while offering the lightweight benefits of glass-reinforced plastic; however, it requires precise installation techniques, specifically a 25mm chase between brick courses to ensure a watertight seal.

All features

Model Part NumberC100C
BrandCromar

Extended Product Information

FAQs

Can I use this on non-brick surfaces?

This product is specifically designed for installation into brickwork chases; it is not recommended for other wall types.

Is the C100C trim paintable?

While the finish is designed to be permanent, it can be painted with high-quality masonry or GRP-compatible exterior paint if a color match is required.

Does this require special tools?

You will need an angle grinder for cutting the chase, a sealant gun for the adhesive, and standard measuring tools.

Can I use standard silicone instead of PUADHESIVE?

No, you must use the specified PUADHESIVE to ensure a long-lasting, weather-tight bond to the GRP material.

How long is each length of flashing?

Please refer to the specific batch packaging, but standard lengths are typically provided in 3-meter sections.

Is this suitable for historical restoration projects?

Because it is a simulated product, check local building regulations or conservation officer requirements before use on historical properties.

Troubleshooting

Flashing does not fit into the mortar joint

Ensure the chase is at least 25mm deep and clear of mortar debris that might prevent a full seat.

Water leaking at the joint

Check that the PUADHESIVE was applied as a continuous, gap-free bead and that no voids exist.

Trim feels loose

Verify that the D260 angle fillet is correctly seated and that the masonry chase width matches the flashing thickness.

Pros and Cons

Pros

  • Significantly cheaper than traditional lead
  • Lightweight and easy to handle
  • Provides a clean, modern aesthetic
  • Weather-resistant material composition

Cons

  • Requires a precise 25mm masonry chase
  • Must be used with specific D260 angle fillet
  • Requires professional-grade adhesive for water-tightness
  • Installation is less forgiving than flexible lead

Setup, Compatibility & Care

For a successful installation, you must pair the C100C flashing with the D260 angle fillet trim. Always use the manufacturer-recommended PUADHESIVE to ensure compatibility with the GRP surface. Installation steps include: 1. Clean the brickwork surface thoroughly. 2. Cut a 25mm chase between the designated brick courses using an angle grinder. 3. Apply a continuous line of PUADHESIVE to the rear of the flashing. 4. Firmly slot the flashing into the chase. 5. Inspect for any gaps where water might pool. Regular maintenance involves inspecting the adhesive seal annually for signs of degradation due to extreme weather exposure.

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