What Is The Difference Between Extruded And Cast Aluminium Guttering?

Extruded and cast aluminium guttering are two common types of aluminium guttering systems, they are both used for rainwater management and drainage systems in residential and commercial settings. They differ in terms of their manufacturing processes, characteristics, and suitability for various applications. Here's a detailed comparison of extruded and cast aluminium guttering:

Manufacturing Process:

Extruded aluminium guttering is made by forcing molten aluminium billets through a die to create a continuous gutter shape. This process involves heating the aluminium and pushing it through the die, resulting in a seamless, uniform gutter shape. Extruded aluminium gutters are usually made from high quality aluminium alloy sheets.

Cast aluminium gutters are manufactured by pouring molten aluminium into a mould or casting to create individual gutter sections. This process involves melting aluminium and pouring it into a specific mould to create the gutter shape. Cast gutters are usually made from pure aluminium or high quality aluminium alloys.

Strength and Durability:

Extruded Aluminium Gutters: Extruded gutters are generally stronger and more durable than cast gutters. They have a higher resistance to bending, warping, and damage from external forces. They are often preferred for regions with harsh weather conditions.

Cast Aluminium Gutters: Cast gutters are typically less sturdy and durable compared to extruded gutters. They can be more prone to warping and damage, particularly in extreme weather conditions.

Seamless vs. Sections:

Extruded Aluminium Gutters: Extruded gutters are seamless, meaning they are continuous without seams except for corners and joints. This minimizes the risk of leaks and enhances their overall performance.

Cast Aluminium Gutters: Cast gutters come in sections, which means they have joints where individual sections are joined together. These joints can be potential areas for leaks if not properly sealed.

Appearance and Finish:

Because of its manufacturing process, extruded guttering often has a smooth, uniform appearance, which is much preferred in contemporary buildings. Extruded guttering is available in a wide range of finishes, including paint or anodized coatings. This allows for customisation in terms of colour and style.

Cast aluminium guttering, similar to cast iron guttering, usually has a more textured or irregular appearance due to the casting process. The rough look of the cast aluminium guttering provides an aesthetic that is more suited to traditional and heritage properties. Also because of the casting process, cast aluminium guttering may have fewer finish options and is less customisable in terms of appearance.

Both two types of aluminium gutters are corrosion resistant, easy to install and require minimal maintenance. Extruded aluminium gutters are known for their strength, seamless and sleek design, making them suitable for more modern settings and regions with harsh weather conditions and where a leak free system is essential. Cast aluminium gutters are more often used in timeless classic buildings and less demanding environments. The choice between the two will depend on your specific needs, budget, and aesthetic preferences.