3mm Aluminium Coping – 90° External Corner | 100mm External Leg

Get a smooth and long-lasting finish for your parapet walls. Designed to perform in any UK weather.

At Online Metal Store, we build coping systems that combine durability and clean design.

This 3mm aluminium coping unit is made for 90° external corners. It gives your parapet walls a secure and watertight seal. Easy to install and built for long-term performance, it's a smart choice for both new builds and refurbishments.

Choose a variant:

Size (Capping Width)

Starting at £120.00

excluding shipping cost

Features + Benefits

Designed for 90° external corners in sloping coping systems
Made from strong 3mm 1050A-grade aluminium
Finished with a long-lasting polyester powder coat
Fire-rated A2-s1,d0 for full safety compliance
Sleek look with no visible fixings
Supplied with 1.5nr fixing brackets per unit
Click-fit system allows fast and secure installation
RAL and BS colour options available
Suitable for residential, commercial, and industrial projects

Specs & Options

Material: 1050A Grade Aluminium
Thickness: 3mm
Internal Leg: 75mm
External Leg: 100mm
Finish: Polyester powder-coated (external grade)
Colours: RAL and BS options available
Fire Rating: A2-s1,d0
Fixings: 1.5nr hidden brackets per unit
Lead Time: 5 to 10 working days
Custom Sizes: Available on request

Installation / Usage Instructions

Each unit comes with hidden brackets. Simply attach the bracket to the top of the wall and click the coping into place. No visible screws. No specialist tools required. Clean finish in just a few minutes.

Looking for a secure and professional finish for your corner coping?

This 3mm aluminium unit is trusted by builders across the UK for its strength and clean design.