Aluminium Box Gutter – 135° External Corner

Turn wide external roof corners into smooth-flowing drainage points with this high-strength aluminium fitting.

The Aluminium Box Gutter – 135° External Corner is engineered for buildings with wide-angle rooflines that demand clean water flow and corner protection. This component ensures a secure and watertight joint at 135° external angles, reducing overflow and directing rainwater efficiently.

Made from corrosion-resistant 1050A-grade aluminium and finished in your choice of powder-coated colours, it integrates seamlessly with Online Metal Store's complete box gutter system. It's ideal for homes, commercial buildings, or industrial units that require a professional, fire-rated solution.

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

£42.60

excluding shipping cost

Download Colour Chart

Features + Benefits

Creates a watertight 135° external angle in gutter systems
Improves drainage efficiency at corner junctions
Powder-coated for long-term protection and colour stability
Fire-rated A2-s1,d0 for UK regulation compliance
Lightweight but durable aluminium body
Seamless fit with the Online Metal Store box gutter system
Ideal for both small-scale and large-scale projects
Fully recyclable and made in the UK
Custom colours available to match project finishes

Specs & Options

Material: 1050A Grade Aluminium
Finish: Polyester powder-coated (RAL/BS colour options)
Fire Rating: A2-s1,d0
Lead Time: 3 to 5 working days
Use Case: 135° external corner for aluminium box gutter systems
Custom Options: Bespoke configurations available upon request

Installation / Usage Instructions

Align the corner fitting with two gutter sections at the 135° external angle. Apply aluminium-compatible sealant along the joining surfaces. Use standard fixings or brackets for a secure connection. Ensure the fall is maintained for uninterrupted water flow.

Working on a wide-angled roofline?