Composite Internal Corner Anthracite - Series 1

Our Anthracite Composite Internal Corner Trim for Series 1 slatted cladding is designed to tidy and protect internal wall junctions, giving your project a clean, continuous finish. This dedicated profile helps conceal cut board edges and creates a neat vertical line wherever two cladded walls meet at an inward angle.

Each trim is approximately 3.6m in length, with a width of around 45.75mm and a thickness of 38.75mm. The smooth Anthracite surface offers a modern, understated look that pairs seamlessly with matching Series 1 slatted panels.

Made from low-maintenance composite material with recycled content, the internal corner trim is resistant to rot, insects and general weathering. A UV-stable finish helps maintain colour over time, making it a reliable choice for both domestic and commercial facades.

This profile is specifically engineered to work with Series 1 slatted cladding and is ideal for creating a coordinated, professional result on feature walls, garden structures and full elevations.

Plan the position of the internal corner trims as part of your overall cladding layout, ensuring the substrate and battens are straight, secure and correctly spaced.

Measure and cut the Anthracite internal corner trim to the required height using appropriate tools for composite materials, taking care to keep cuts square and clean.

Position the trim in the internal corner so that it sits centrally and provides an even edge on both sides for the slatted boards to finish against.

Pre-drill fixing holes along the length of the trim if you are using screws, spacing them at regular intervals and avoiding the very edges of the profile.

Secure the trim to the underlying battens or structure using suitable exterior-grade screws, or apply a recommended outdoor adhesive where screw fixings are not preferred and press the trim firmly into place.

Once the internal corner trim is fixed, install the Series 1 slatted cladding boards so that their cut ends sit neatly against the trim, maintaining the required expansion gaps for a long-lasting, professional finish.