Aluminium Downpipes

Aluminium Downpipes and Rainwater Pipes

Guttercrest manufactures a comprehensive range of aluminium downpipes and rainwater pipe systems for residential, commercial, heritage and high-security projects throughout the UK.

Our range includes round, square and rectangular aluminium downpipes in both traditional and contemporary styles. Standard systems are available with a wide selection of bends, branches, outlets, collars, brackets and other fittings. We can also manufacture bespoke downpipes and components for unusual building details or project-specific requirements.

Aluminium downpipes are lightweight, durable and corrosion resistant, making them suitable for new construction, refurbishment, restoration and replacement rainwater systems.

Explore Our Aluminium Downpipe Range

Choose from traditional cast aluminium downpipes, modern smoothline systems and specialist profiles:

• Round aluminium downpipes
• Round smoothline downpipes
• Traditional round cast downpipes
• Square aluminium downpipes
• Square smoothline downpipes
• Georgian square and rectangular downpipes
• Rectangular aluminium downpipes
• Anti-vandal and anti-climb downpipes
• High-security downpipes
• Bespoke aluminium downpipes

Our technical team can help you select a profile, size and fixing arrangement that suits your building and rainwater system.

Benefits of Aluminium Downpipes

Corrosion Resistant

Aluminium does not rust, making it well suited to external rainwater systems and the wet conditions experienced throughout the UK. A durable polyester powder-coated finish provides additional protection and creates a long-lasting appearance.

Lightweight and Strong

Aluminium downpipes are considerably lighter than traditional cast iron systems. This makes them easier to handle and install while still providing the strength required for residential and commercial applications.

Traditional and Contemporary Designs

Traditional cast aluminium downpipes recreate the appearance of heritage cast iron rainwater pipes while offering the practical benefits of aluminium. Our smoothline and fabricated systems provide clean, simple lines for modern architectural projects.

Low Maintenance

Powder-coated aluminium requires minimal routine maintenance. Unlike some alternative materials, it will not rust and does not require frequent repainting when correctly installed and maintained.

Suitable for Bespoke Projects

Aluminium can be cast, extruded, folded, fabricated and welded into a wide variety of profiles. This allows us to manufacture non-standard downpipes, collars, brackets, offsets and fittings for individual project requirements.

Downpipe Shapes and Sizes

Our aluminium downpipes are available in a wide selection of standard diameters and dimensions. Depending on the selected system, profiles include:

• Round and circular downpipes
• Square downpipes
• Rectangular downpipes
• Flush-jointed smoothline profiles
• Traditional cast-collar profiles
• Anti-vandal and high-security profiles

The correct downpipe size depends on factors including the roof area, gutter capacity, rainfall intensity and the number and position of outlets. Our technical team can help establish the most appropriate rainwater pipe size for your project.

Downpipe Fittings and Brackets

We manufacture a comprehensive selection of aluminium downpipe fittings and accessories, including:

• Downpipe bends and offsets
• Branches and junctions
• Swan necks and plinth offsets
• Rainwater diverters
• External collars and internal spigots
• Standard and purpose-made pipe brackets
• Flush-to-wall and stand-off brackets
• Decorative cast collars and brackets

Special fittings can be manufactured to suit unusual wall details, projections, angles and connections to existing rainwater systems.

Traditional Cast Aluminium Downpipes

Our traditional aluminium rainwater pipes are inspired by nineteenth-century cast iron downpipes. They provide an authentic heritage appearance and are particularly suitable for listed buildings, conservation areas, period properties and restoration projects.

Traditional systems are available in round, square and rectangular profiles, with complementary cast collars, brackets and fittings. They offer the visual character of cast iron with the lighter weight and corrosion resistance of aluminium.

Modern Aluminium Downpipes

Our contemporary aluminium downpipes provide clean lines for modern homes, apartments, offices, schools and commercial developments. Smoothline systems can use concealed or flush joints to create a neat, uninterrupted appearance.

Round, square and rectangular profiles are available, along with anti-vandal and flush-to-wall options for projects where security, durability or a minimal projection is important.

Bespoke Aluminium Downpipes

Where a standard system is unsuitable, Guttercrest can manufacture bespoke aluminium downpipes and fittings to meet individual project requirements.

Non-standard shapes, dimensions, collars, spigots, offsets and brackets can be produced for new buildings, refurbishments and sensitive restoration work. Early consultation allows our technical team to consider appearance, capacity, fixing requirements and connections with other rainwater goods.

Colours and Finishes

Our aluminium downpipes are available polyester powder coated in a wide selection of RAL, BS and heritage colours. Textured, metallic and other specialist finishes may also be available, subject to project requirements.

Downpipes can be coordinated with aluminium gutters, hopper heads, fascias, soffits, copings and cappings to create a consistent finish across the building. Mill-finish aluminium is also available for suitable systems.

Complete Aluminium Rainwater Systems

Guttercrest aluminium downpipes can be combined with our gutters, outlets, hopper heads and associated rainwater fittings. We can also help integrate new aluminium downpipes with an existing rainwater system.

For help choosing a downpipe profile, calculating the required capacity or specifying bespoke components, contact our technical team on 01691 663300.

Frequently Asked Questions

Do aluminium downpipes rust?

Aluminium does not rust like iron or steel. This makes it a durable, low-maintenance material for external rainwater pipes. Polyester powder coating also provides a decorative and protective finish.

Are aluminium downpipes suitable for listed buildings?

Traditional cast aluminium downpipes can provide an appearance similar to heritage cast iron systems. Any work to a listed building should be agreed with the relevant conservation or planning authority before installation.

Can aluminium downpipes replace cast iron pipes?

In many cases they can. The replacement profile, dimensions, outlet connections and fixing positions must be checked to ensure the new system is suitable for the building.

What shapes of aluminium downpipe are available?

Guttercrest manufactures round, square and rectangular downpipes, including traditional cast, contemporary smoothline, anti-vandal and high-security systems.

Can you manufacture bespoke downpipe fittings?

Yes. We can manufacture purpose-made offsets, collars, spigots, brackets and other fittings for project-specific dimensions and building details.

What colours are available?

Aluminium downpipes can be polyester powder coated in a wide selection of RAL, BS and heritage colours. Specialist colours and finishes may also be available upon request.