3mm Aluminium Coping – 90° Corner | 75mm External Leg

Connect your coping runs at right angles with a sleek, weatherproof corner built for durability.

The 3mm Aluminium 90° Coping Corner is designed for joining two coping lengths at a precise right angle, offering a clean, seamless finish on parapet walls. Crafted from high-strength 3mm 1050A-grade aluminium and coated in external-grade polyester powder paint, it delivers lasting protection against weather, water, and UV exposure. With a 75mm external leg, it's ideal for standard wall coverage while maintaining a smooth architectural appearance.

Please refer to the attached RAL colour chart to view available options. At checkout, enter your chosen RAL colour in the designated box.

Choose a variant:

Size (Capping Width)

Starting at £117.12

excluding shipping cost

Download Colour Chart

Features + Benefits

90° corner coping unit for right-angled wall joints
3mm aluminium for superior strength and long life
75mm external leg for compact, neat edge coverage
Fire-rated to A2-s1,d0 for full UK regulation compliance
Durable polyester powder-coated finish
Push-click system with no visible screws
Supplied with hidden fixing brackets
Available in full RAL and BS colour range
Matches all Online Metal Store flat coping products
Designed and manufactured in the UK from recyclable aluminium

Specs & Options

Type: 90° Corner Coping
Material: 1050A Grade Aluminium
Thickness: 3mm
External Leg: 75mm
Finish: Polyester powder-coated (external grade)
Fire Rating: A2-s1,d0
Colours: Available in RAL and BS ranges
Fixings: Hidden brackets included
Lead Time: 3 to 5 working days
Custom Sizes: Available on request

Installation / Usage Instructions

Install on top of 18mm external grade plywood. Fix brackets in place with EPDM seal tape. Use the push-click fitting system to connect the corner unit, allowing a 3mm expansion gap between adjoining coping sections. No visible fixings required.

Need a strong, stylish solution for your parapet wall corners?