Composite Internal Corner Black - Series 1

The Composite Internal Corner Black – Series 1 trim is designed to give internal wall corners a precise, contemporary finish on slatted cladding projects. It neatly conceals cut edges and intersections where two cladded walls meet, ensuring your installation looks consistent and professionally detailed.

Each trim is supplied at approximately 3.6m in length with an engineered profile around 45.75mm wide by 38.75mm thick. The smooth Black face delivers a bold, modern edge that works especially well with contemporary architectures, feature walls and darker exterior palettes.

Manufactured from a robust capped composite, this internal corner trim is built to withstand the elements when correctly fitted. It is resistant to weathering, insect damage and rot, and benefits from a UV-stable surface that helps maintain its deep black shade over time, with minimal ongoing maintenance.

The profile is intended to integrate cleanly with timber or composite battens and Series 1 slatted boards, helping you maintain straight lines, tidy intersections and a uniform appearance throughout the cladding run. Ideal for both residential and commercial schemes, it offers the durability and visual impact required for long-lasting results.

For a perfect match and reliable performance, install only with Series 1 slatted cladding products.

Review your cladding layout and mark the positions of all internal corners where the Black internal corner trims will be fitted, ensuring there are battens behind for secure fixing.

Cut each trim to the desired length using suitable cutting tools, making sure the ends are clean and true.

Place the trim into the internal corner so that it sits tight against both faces and aligns with your proposed cladding board positions.

Pre-drill pilot holes through the trim into the battens at regular intervals along its height, avoiding any areas where cladding fixings will later be positioned.

Fix the trim in place with appropriate exterior screws, checking regularly that it remains straight, plumb and firmly secured.

Install the Series 1 slatted cladding boards up to the corner, positioning their edges to sit neatly in line with or within the internal trim for a tidy joint.

When installation is complete, wipe down the trim and surrounding boards to remove dust and confirm that the internal corner presents a smooth, uninterrupted finish.