3mm Aluminium Sloping Coping – 90° Internal Corner | 100mm External Leg

Complete your coping system with precision using our 3 mm aluminium sloping coping 90° internal corner. Designed to create a smooth, watertight junction between two inward-facing coping runs, it delivers a sharp, professional finish while maintaining full weather protection along your parapet walls.

Key Features

• 3 mm architectural-grade aluminium for strength and corrosion resistance

• 90° internal corner design ensures a perfect fit between coping sections

• 100 mm external leg for consistent wall coverage and alignment

• Sloping profile promotes water drainage and prevents staining on walls

• Powder-coated finish available in any RAL colour

• Precision-made in the UK with quick lead times and nationwide delivery

• Compatible with all OMS coping systems for easy, secure installation

Why Choose This Aluminium Coping Corner

This internal corner unit is crafted to keep your coping runs neat, secure, and watertight where they meet at inward-facing junctions. Its built-in slope ensures smooth water run-off, helping prevent leaks and discolouration on parapet walls. Ideal for both commercial and residential builds, it adds detail, durability, and long-term performance to any modern roofing project.

What is a 90° internal coping corner?
It’s a joining section used where two aluminium coping runs meet at an inside angle, ensuring a neat, watertight connection.

Can this internal corner be used with sloping copings?
Yes – it matches the sloped profile of our coping system, allowing continuous water drainage across the corner.

What materials is it made from?
Each corner is manufactured from 3 mm powder-coated aluminium for exceptional strength and long-term corrosion resistance.

How is the corner installed?
The section fits securely between coping runs using concealed brackets and sealant for a clean, seamless appearance.

Are custom sizes or angles available?
Absolutely, bespoke internal corners can be produced to any dimension, slope, or colour to suit your project.

UK-made 3 mm aluminium sloping coping internal corner with 100 mm external leg. Powder-coated in all RAL colours for a seamless parapet finish.