Fascia Board Internal Corner - 300mm

Internal corner trims are designed to conceal the 10mm expansion gap required between two fascia b...

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Professional Building SuppliesFreefoam White Fascia Board Internal Corner - 300Mm
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PVC Cladding UKFreefoam White Fascia Board Internal Corner - 300Mm
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B&QB&Q - Freefoam White Upvc Fascia Board Internal Corner 300mmHides 10mm Expansion Gap
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Product Information

Full details

The PBSL Group Fascia Board Internal Corner is an essential accessory for professional roofline installers and DIY enthusiasts looking to finish roof valleys with a clean, concealed aesthetic. Its primary benefit is providing a seamless appearance while actively accommodating the 10mm expansion gap required for PVC fascias. Users should note that this product requires a specific 'glue-and-seal' installation technique to ensure structural movement is not restricted during thermal expansion.

All features

Model Part NumberFWXI
BrandPBSL Group

Extended Product Information

FAQs

Can I use this for external corners?

No, this product is specifically designed for internal corners where two fascia boards meet in a valley.

What type of adhesive should I use?

Use a professional-grade PVC adhesive or solvent weld for the fixed side of the joint.

Why is the 10mm gap important?

PVC plastic expands and contracts significantly with temperature changes. Without the gap, the boards will buckle or pop out of alignment.

Is the material easy to cut?

Yes, a standard hacksaw or a fine-toothed handsaw will cut through the PVC cleanly.

Do I need to maintain this trim?

Minimal maintenance is required; cleaning it with soapy water during regular gutter cleaning is sufficient.

Troubleshooting

Trim is bowing or warping after installation

This occurs if both sides were glued down. Ensure one side remains loose with only silicone applied to allow for thermal movement.

Gap between trim and fascia board

Ensure the fascia boards are plumb and square; if the gap persists, check that the trim was cut square to the fascia profile.

Pros and Cons

Pros

  • Provides a professional, neat finish to roof valley corners
  • Easy to trim to fit specific fascia profiles
  • Allows for natural material expansion, preventing buckling
  • Weather-resistant construction

Cons

  • Requires both adhesive and silicone for correct installation
  • Limited to internal corner applications
  • Must be installed with specific movement tolerances in mind

Setup, Compatibility & Care

To install, first ensure your 10mm expansion gap is measured correctly between the two fascia boards.

  1. Measuring: Measure the vertical height of your fascia board and mark the trim accordingly.
  2. Cutting: Use a fine-toothed saw or hacksaw to cut the trim to length for a clean edge.
  3. Applying: Apply a high-quality PVC adhesive to one side of the joint to fix it permanently to one board.
  4. Sealing: Apply a bead of low-modulus silicone to the other side. This is crucial as it allows the second board to slide against the silicone rather than being glued rigid, which is essential for movement.

For care, simply wipe down the trim with a mild soapy solution during your annual roofline inspection to remove any buildup of debris.

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