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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.

Choose a variant:

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.