Aluminium Box Gutter – 90° External Corner

Seal and guide rainwater smoothly around external roof angles with a durable 90° aluminium corner fitting.

The Aluminium Box Gutter – 90° External Corner is designed to connect two box gutter sections at an external 90-degree angle. It ensures a continuous water flow around building corners while maintaining a clean, watertight joint. Built from corrosion-resistant 1050A-grade aluminium and coated for long-term protection, this fitting is ideal for both new builds and renovations. It integrates perfectly with the Online Metal Store's full box gutter system, providing a seamless and reliable rainwater solution.

Please refer to the attached RAL colour chart to view available options. At checkout, enter your chosen RAL colour in the designated box.

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Size

£42.60

excluding shipping cost

Download Colour Chart

Features + Benefits

Creates a strong, watertight 90° external gutter corner
Prevents overflow and leakage at sharp roof angles
Compatible with standard box gutter profiles
Made from lightweight, rust-resistant aluminium
Powder-coated for lasting durability and colour stability
Fire-rated A2-s1,d0 for UK building compliance
Quick and easy to install
Suitable for residential, commercial, and industrial buildings
Manufactured in the UK
Recyclable and low-maintenance

Specs & Options

Material: 1050A Grade Aluminium
Finish: Polyester powder-coated (RAL/BS colour range)
Fire Rating: A2-s1,d0
Lead Time: 3 to 5 working days
Use Case: External corner fitting for box gutter systems
Custom Sizes: Available on request

Installation / Usage Instructions

Align the corner piece with two box gutter runs at a 90° external angle. Apply aluminium-compatible sealant to all joining surfaces and secure with fixings for a leak-free connection. Ensure bracket spacing supports the full corner.

Need to navigate external roof angles with confidence?