3mm Aluminium Coping 135° Corner | 75mm External Leg

Connect angled walls with a precise 135° corner unit built for performance and a polished finish.

The 3mm Aluminium 135° Coping Corner is purpose-built for angled parapet wall designs, offering both visual appeal and functional protection. Crafted from 3mm thick 1050A-grade aluminium, this external corner piece creates a seamless transition between coping runs at 135° angles. With a 75mm external leg, it offers standard coverage while the external-grade polyester powder coating ensures long-term durability against rust, UV, and weathering.

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 £129.60

excluding shipping cost

Download Colour Chart

Features + Benefits

Forms a clean 135° corner between coping runs
3mm aluminium for superior strength and longevity
75mm external leg for standard wall edge coverage
Fire-rated A2-s1,d0 – UK building regulation compliant
Polyester powder-coated for weatherproof protection
Push-click system for seamless, screw-free appearance
Supplied with hidden fixing brackets for secure mounting
Available in all RAL and BS colour ranges
Matches all Online Metal Store flat coping products
Fully recyclable and made in the UK

Specs & Options

Type: 135° Corner Coping
Material: 1050A Grade Aluminium
Thickness: 3mm
External Leg: 75mm
Finish: Polyester powder-coated (external grade)
Fire Rating: A2-s1,d0
Colours: RAL/BS full colour range available
Fixings: Hidden brackets included
Lead Time: 3 to 5 working days
Custom Sizes: Available upon request

Installation / Usage Instructions

Fix brackets to 18mm external grade plywood. Apply EPDM tape across each bracket. Push-fit the 135° corner unit into place, allowing a 3mm expansion gap between connected lengths. The click-fit system ensures fast, secure, and clean installation.

Looking to finish your angled parapet corners with style and strength?