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Professional Building Supplies£9.14Visit shop Freefoam Anthracite/Grey Fascia Board Internal Corner - 300Mm
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The Freefoam Internal Corner Trim is designed for professional installers and DIY enthusiasts working with roofline systems, providing a clean, aesthetic finish at the intersection of two fascia boards. Its primary benefit is the effective concealment of the essential 10mm expansion gap required for PVC roofline stability. While highly effective at masking junctions, users should note that the trim requires careful installation—specifically a combination of rigid bonding and flexible sealing—to properly manage thermal movement without causing warping or joint failure.
| Model Part Number | FWXIWGAG |
|---|---|
| Brand | Freefoam |
PVC expands and contracts significantly with temperature changes; without this gap, the boards could buckle or pop out of their fixings.
No, doing so will prevent thermal expansion and can lead to damage to the fascia boards or the trim itself.
Always use a low modulus silicone sealant, as it provides the necessary flexibility for PVC movement.
This product is specifically designed for internal corners and roof valley applications; external corners require different corner profiles.
Use a soft, non-abrasive cloth and mild, soapy water. Avoid solvent-based cleaners which may damage the surface finish.
Check that the trim was not glued on both sides. One side must remain free to move with the expansion of the boards using only flexible silicone.
Ensure fascia boards are correctly spaced before installation; if the gap exceeds the trim's coverage, the boards may need adjustment.
Use a finer-toothed saw and consider lightly sanding the cut edge with a fine-grade sandpaper for a smooth finish.
To install, ensure your fascia boards are securely fixed with the required 10mm gap preserved between them at the corner joint. Measure the required height of the internal corner trim and cut to length. Apply a suitable PVC adhesive to one inner flange of the trim to secure it to one board. For the opposing flange, apply a bead of low modulus silicone sealant. This allows for movement while preventing water ingress. Clean the trim periodically with a soft cloth and mild soapy water to maintain the Anthracite Grey finish and remove accumulated grime.
