Aluminium Box Gutter Corner – 90° External Corner Solution

The Aluminium Box Gutter Corner 90° External Corner Solution is designed to create a clean outward 90 degree turn within an aluminium box gutter system. It helps connect two gutter runs around an external building corner while keeping the roofline neat, consistent, and suitable for practical rainwater drainage.

This external corner is available in 100mm x 75mm, 125mm x 100mm, and 150mm x 100mm size options, with a RAL colour selection available before ordering. The product page lists the price from £35.50 excluding VAT and confirms that this is a custom-fabricated item made to the selected size and finish.

For a complete system, this corner can be planned alongside matching aluminium rainwater goods, roofline products, outlets, stopends, downpipes, and other gutter fittings. Online Metal Store Ltd also provides a useful aluminium guttering guide for buyers comparing profiles, sizing, installation, and long-term care.

Key Benefits.

• Creates a clean 90 degree external turn for aluminium box gutter systems.

• Helps maintain a consistent roofline where guttering runs around an outward-facing corner.

• Available in 100mm x 75mm, 125mm x 100mm, and 150mm x 100mm size options.

• RAL colour selection helps match the corner with gutter lengths, fascia, soffits, copings, cladding, and downpipes.

• Aluminium construction provides a lightweight, corrosion-resistant, and low-maintenance option for UK roof drainage.

• Can be paired with the 90° internal aluminium box gutter corner where a project needs both internal and external corner fittings.

• Supports a more coordinated roofline when used with the wider rainwater goods range.

Product Details and Specification.

These product details are based on the current Online Metal Store Ltd product page. Buyers should double-check measurements, size selection, and finish before placing an order because the product is custom fabricated.

Where This Product Is Commonly Used.

This aluminium box gutter 90° external corner is suitable for residential extensions, commercial rooflines, modern flat roof edges, refurbishment projects, and bespoke rainwater drainage systems. It is especially useful where the gutter run needs to turn neatly around an external building corner without disrupting the look of the roofline.

For larger projects, buyers can browse the full aluminium rainwater goods range or read the aluminium guttering guide before choosing matching profiles and fittings.

Why Aluminium Is a Good Choice.

Aluminium is a strong practical choice for guttering because it is lightweight, corrosion resistant, and suitable for clean architectural detailing. This makes it easier to handle on site while still providing a durable external finish for UK roofline applications.

Aluminium is also widely recognised as recyclable and durable. The Aluminum Association notes that aluminium is 100% recyclable and can be recycled repeatedly without losing its inherent value. This makes it a useful material choice for long-term construction and rainwater goods applications. Learn more about aluminium sustainability.

Finish and Colour Options.

The RAL colour option allows this gutter corner to be matched with other visible roofline products, including fascia, soffits, copings, downpipes, cladding, and gutter lengths. This is useful when the project needs a clean, coordinated finish across all external aluminium details.

For buyers planning a complete roofline package, it may also be helpful to view the Fascia and Soffits range alongside the gutter system. The Online Metal Store aluminium guttering guide also notes that their rainwater goods include guttering profiles, matching downpipes, outlets, angles, stopends, and fittings.

For external aluminium finishes, QUALICOAT UK & Ireland describes QUALICOAT as a quality label organisation focused on maintaining and promoting powder coating quality on aluminium and aluminium alloys for architectural applications. Read about QUALICOAT powder coating.

Installation and Ordering Notes.

Before ordering, check whether your project requires the 100mm x 75mm, 125mm x 100mm, or 150mm x 100mm size. Also confirm the RAL colour, corner direction, adjoining gutter lengths, outlets, stopends, brackets, sealants, fixings, and downpipe connections.

This product should be planned as part of a complete rainwater drainage system. Approved Document H covers guidance for drainage, including surface water and rainwater drainage. Buyers working on new builds, extensions, or larger roof drainage projects should check relevant building guidance or speak with a qualified contractor. View Approved Document H guidance.

If the project also includes an inward-facing roofline return, the matching Aluminium Box Gutter 90° Internal Corner may be required.

Why Buy From Online Metal Store Ltd.

Online Metal Store Ltd supplies aluminium rainwater goods and roofline products for UK construction, refurbishment, and architectural metalwork projects. Their guttering guide states that the company supplies a full aluminium rainwater goods range, including guttering profiles, matching downpipes, outlets, angles, stopends, and fittings.

For this product, buyers can order a custom-fabricated external corner in a selected size and RAL colour, helping the fitting work more naturally with the wider guttering and roofline system. If you are unsure which profile, corner type, or accessory you need, use the Contact Us page before ordering.

FAQ Section.

What is this aluminium box gutter corner used for?

It is used to create a 90 degree external turn in an aluminium box gutter system where the guttering needs to continue around an outward-facing building corner.

What sizes are available?

The product page lists 100mm x 75mm, 125mm x 100mm, and 150mm x 100mm size options.

Can I choose a RAL colour?

Yes. The product page includes a RAL colour option, so the corner can be selected to match other roofline and rainwater goods.

Is this suitable for commercial projects?

Yes. It can be used on commercial and residential projects where a compatible aluminium box gutter system is being installed.

Do I need other fittings?

Usually, yes. A full system may need gutter lengths, outlets, stopends, joiners, brackets, sealant, fixings, and downpipe connections.

Can this product be returned?

The product page states that it is custom fabricated to the selected size and finish, and is non-returnable unless faulty.

What should I check before ordering?

Check the gutter size, RAL colour, external corner direction, matching fittings, outlet position, and full rainwater drainage layout.

Choose the correct size and RAL colour for your aluminium box gutter 90° external corner, then check the rest of your rainwater system before ordering. For project-specific advice, contact Online Metal Store Ltd before purchase.