Aluminium Box Gutter – 135° Internal Corner

Navigate angled rooflines with a sleek, leakproof gutter corner built for durability and effortless water control.

The Aluminium Box Gutter – 135° Internal Corner is the perfect solution for guiding rainwater through wide-angle internal roof turns. Precision-engineered from corrosion-resistant 1050A-grade aluminium, this fitting provides a watertight connection between gutter sections while maintaining a clean visual line. Whether you're working on a residential extension or a commercial project, this corner piece ensures smooth water flow, prevents pooling, and fits seamlessly into our full aluminium box gutter system.

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

Watertight connection for 135° internal gutter corners
Prevents water buildup and reduces risk of leaks
Made from lightweight, corrosion-resistant aluminium
Powder-coated for long-lasting protection
Fire-rated A2-s1,d0 for building regulation compliance
Clean, pre-formed design for quick and easy installation
Suitable for domestic, commercial, or industrial applications
Fully recyclable and low maintenance
Manufactured in the UK

Specs & Options

Material: 1050A Grade Aluminium
Finish: Polyester powder-coated (RAL/BS colours)
Fire Rating: A2-s1,d0
Lead Time: 3 to 5 working days
Application: 135° internal corner joint for aluminium box gutter systems
Custom Options: Bespoke sizing available on request

Installation / Usage Instructions

Position the corner fitting at the internal joint of your box gutter system. Apply sealant approved for aluminium components at all edges and secure in place with appropriate fixings. Maintain proper slope to ensure water flows efficiently through the system.

Need a neat solution for wide-angle internal gutter corners?