3mm Aluminium Coping – 3m Length | 100mm External Leg

Cover and protect your parapet walls with a sleek 3m aluminium coping that's built for long-term performance.

This 3m coping unit is part of our premium aluminium sloping coping system. Designed to shield parapet walls and roof edges from water damage, it features a 100mm external leg for solid wall coverage without bulk. Made from 3mm 1050A-grade aluminium and powder-coated with external-grade paint, it offers excellent durability, a clean appearance, and fire safety compliance. Perfect for both modern new builds and restoration projects.

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:

Capping Width

Starting at £230.40

excluding shipping cost

Download Colour Chart

Features + Benefits

3m long coping for quick coverage with fewer joins
3mm aluminium for strong, stable protection
100mm external leg for balanced wall coverage
External-grade polyester powder coating
Fire-rated A2-s1,d0 for full compliance
Supplied with 2–4 hidden brackets based on size
Includes EPDM seal tape for every 10m ordered
No visible fixings with push-click installation
RAL and BS colours available
Lightweight, recyclable aluminium
Made in the UK and suitable for all property types

Specs & Options

Material: 1050A Grade Aluminium
Thickness: 3mm
Length: 3 metres
Internal Leg: 75mm
External Leg: 100mm
Finish: External-grade polyester powder coating
Colours: All RAL/BS colour options available
Fire Rating: A2-s1,d0
Fixings: 2–4 hidden brackets per unit (based on size)
Seal: EPDM tape supplied per 10m
Lead Time: 3 to 5 working days
Custom Sizes: Available on request

Installation / Usage Instructions

Fix brackets to the top of 18mm plywood. Apply EPDM sealing tape, then click the coping into place using the push-fit system. Leave a 3mm expansion gap between lengths. No visible screws or special tools required.

Need a strong and clean coping solution for your wall edges?

This 3mm aluminium coping with a 100mm external leg is trusted by professionals across the UK.
Order now or get in touch with the Online Metal Store team for custom colours or sizes.