3mm Aluminium Coping – 90° T-Junction | 75mm External Leg

Connect three coping runs at a right-angled junction with a clean, strong, weatherproof finish.

The 3mm Aluminium 90° T-Junction Coping Unit is designed to neatly and securely join three flat coping runs at a T-shaped intersection. Built from robust 3mm 1050A-grade aluminium and finished with external-grade polyester powder coating, this unit delivers long-term performance in any weather. With a 75mm external leg, it offers standard wall coverage while maintaining a flush, contemporary appearance. Ideal for both new builds and existing flat roof systems.

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 £158.40

excluding shipping cost

Download Colour Chart

Features + Benefits

Pre-formed 90° T-junction for flat coping systems
3mm aluminium for structural strength and durability
75mm external leg for clean edge coverage
Fire-rated A2-s1,d0 – UK regulation compliant
Polyester powder-coated for long-lasting weather resistance
Simple push-click system for a seamless, screw-free finish
Supplied with 2nr concealed fixing brackets
Available in full RAL and BS colour selections
Fully compatible with Online Metal Store coping ranges
Recyclable and made in the UK

Specs & Options

Type: 90° T-Junction Coping
Material: 1050A Grade Aluminium
Thickness: 3mm
External Leg: 75mm
Finish: Polyester powder-coated (external grade)
Fire Rating: A2-s1,d0
Colours: Full RAL/BS colour options available
Fixings: 2nr hidden brackets included
Lead Time: 3 to 5 working days
Custom Sizes: Available upon request

Installation / Usage Instructions

Mount to 18mm external grade plywood using the two included hidden brackets. Apply EPDM sealing tape to each bracket for a watertight seal. Push-fit the T-junction unit into place with a 3mm expansion gap at each joining point. Click-fit system ensures a secure and screw-free installation.

Need a strong, professional join for three coping runs?

This 3mm aluminium 90° T-junction with 75mm leg offers precise fit, strength, and long-term performance. Order now or speak with the Online Metal Store team for layout advice or bespoke options.