3mm Aluminium Sloping Coping – 90° External Corner | 125mm External Leg

Form a clean, watertight junction at external wall angles with our 3 mm aluminium sloping coping 90° external corner. Featuring a 125 mm external leg for added wall coverage, this precision-engineered corner section connects coping runs smoothly while maintaining the slope for efficient rainwater drainage and an elegant architectural finish.

Key Features

• 3 mm architectural-grade aluminium for strength, rigidity, and long-term corrosion resistance

• 90° external corner designed for perfect alignment on outward wall junctions

• 125 mm external leg provides extended wall coverage and improved weather protection

• Integrated slope channels rainwater away to prevent staining or damp

• Powder-coated finish available in all RAL colours for design flexibility

• Lightweight and easy to install, compatible with all OMS coping systems

• Manufactured in the UK with short lead times and reliable quality control

Why Choose This Aluminium Coping Corner

This 90-degree external corner is designed for precision and durability, ensuring your coping runs meet seamlessly around outward-facing wall angles. The wider 125 mm leg provides superior coverage and weather resistance, ideal for exposed parapets and rooflines. With its sloped design, it promotes smooth water run-off and creates a crisp, professional edge detail suited to both residential and commercial buildings.

What is a 90° external coping corner used for?
It joins two coping runs at an outward right-angle, creating a neat, watertight junction and a continuous slope for rainwater run-off.

Why choose the 125 mm external leg?
The wider leg offers greater wall coverage and better protection against heavy rain and wind exposure.

Is this corner compatible with sloped coping systems?
Yes, it matches OMS’s sloped coping profiles for consistent drainage and alignment across corners.

Can it be colour-matched to other coping sections?
Absolutely. It’s powder-coated in any RAL colour for a uniform finish across your project.

How is the external corner installed?
It fits securely between coping sections using concealed brackets and sealant, providing a smooth, watertight joint without visible fixings.

UK-made 3 mm aluminium sloping coping 90° external corner with 125 mm external leg. Powder-coated in all RAL colours for a modern, watertight parapet finish.