3mm Aluminium Coping – 3m Length | 125mm External Leg

Protect your parapet walls with a long, weathertight aluminium coping system designed for performance and a clean finish.

This 3m aluminium coping unit is part of our premium sloping coping system, built to protect the tops of parapet walls and terraces. Made from high-grade 3mm aluminium, it offers long-term resistance to wind, water, and weather.

With a wide 125mm external leg, it ensures full coverage for deeper wall edges while maintaining a sleek appearance. Powder-coated for extra durability and fire-rated to A2-s1,d0, this coping is ideal for both new builds and refurbishment 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:

Size (Capping Width)

Starting at £235.20

excluding shipping cost

Download Colour Chart

Features + Benefits

3m long unit for fast coverage with fewer joints
Manufactured in durable 3mm 1050A-grade aluminium
125mm external leg for larger wall coverage
Powder-coated with external-grade paint for weather resistance
Fire-rated A2-s1,d0 for full compliance
Supplied with 2 to 4 hidden fixing brackets (based on width and thickness)
EPDM sealing tape provided with every 10m ordered
Push-click fitting system with no visible screws
Available in all RAL/BS colour options
Designed and fabricated in the UK
100% recyclable aluminium
Suitable for industrial, commercial, and residential builds

Specs & Options

Material: 1050A Grade Aluminium
Thickness: 3mm
Length: 3 metres
Internal Leg: 75mm
External Leg: 125mm
Finish: Polyester powder-coated (external grade)
Colours: RAL and BS 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 18mm external-grade plywood along the wall. Apply EPDM seals to each bracket. Click the coping into place using the push-fit system. Allow a 3mm expansion gap at each joint. No visible fixings or penetrations required.

Looking for a long-length coping solution with clean lines and strong coverage?