Fascia Capping Board External Corner - Anthracite Grey - 300mm

Corner trims are used to hide the 10mm expansion gap that should be left between two boards at the...

Best current price£11.30from Professional Building Supplies

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Professional Building SuppliesPbsl Group Anthracite/Grey Fascia Capping Board External Corner - 300Mm
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PVC Cladding UKPbsl Group Anthracite/Grey Fascia Capping Board External Corner - 300Mm
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Product Information

Full details

Designed for professional installers and DIY enthusiasts, the PBSL Group Fascia Capping Board External Corner (MPN: RT4WA) is essential for finishing PVC fascia installations by concealing 10mm expansion gaps. While it provides a clean, seamless aesthetic in a modern anthracite grey finish, users must adhere to specific bonding techniques to ensure the system can properly expand and contract across varying temperature ranges.

All features

Model Part NumberRT4WA
BrandPBSL Group

Extended Product Information

FAQs

Why do I need a 10mm expansion gap?

PVC materials expand and contract with temperature changes. A 10mm gap prevents the boards from warping or buckling under heat.

Can I use superglue to attach both sides?

No. One side must be sealed with low-modulus silicone to allow the material to move; gluing both sides will cause the joint to fail.

What type of saw should I use to cut the trim?

A standard hacksaw or a fine-toothed wood saw is recommended to ensure a clean, smooth edge without splintering the PVC.

Is this trim suitable for internal use?

While it can be used indoors, it is specifically manufactured to withstand the UV exposure and weather conditions found in external fascia applications.

Does this corner come in other colors?

This specific variant is provided in Anthracite Grey.

Troubleshooting

Corner trim is bowing or warping

Ensure that one side of the joint was left to move freely using low-modulus silicone; excessive glue on both sides prevents natural thermal expansion.

The trim is too long for the corner

Use a fine-toothed saw or a hacksaw to carefully trim the section to size; always double-check measurements before cutting.

Sealant is peeling away from the trim

Ensure the surface of the PVC is clean, dry, and free from dust or grease before applying the silicone sealant.

Pros and Cons

Pros

  • Seamlessly conceals unsightly expansion gaps
  • Durable PVC material resists weathering
  • Easy to trim with basic manual tools
  • Matches standard anthracite grey fascia boards
  • Allows for thermal movement when installed correctly

Cons

  • Requires specific adhesive and sealant combination
  • Not intended for structural load-bearing
  • Requires precise cutting to ensure tight fit

Setup, Compatibility & Care

To install, measure your corner height accurately and use a fine-toothed saw to cut the 300mm trim to the required length. Ensure the fascia boards underneath have a consistent 10mm expansion gap before applying the trim.

  • Compatibility: Designed for use with standard PVC fascia capping boards.
  • Installation: Use high-quality PVC adhesive on one side and a low-modulus silicone sealant on the other to facilitate thermal movement.
  • Care: Periodic cleaning with warm, soapy water and a soft cloth is sufficient to maintain the appearance. Avoid abrasive cleaners or strong solvents that may degrade the PVC surface.

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