Aluminium Window Sills

Bespoke aluminium window sills manufactured to enhance both functionality and style.

Custom-made aluminium window sills precision-manufactured for clean detailing, long-term durability, and a wide range of colour-matched finishes to complement and enhance your façade.

Why aluminium works well for window sills

Aluminium is particularly well suited to window sills because it combines precision detailing with long-term external performance.

It forms cleanly to create sharp drips, accurate falls, and consistent profiles, helping manage water effectively away from the façade. Once installed, aluminium remains dimensionally stable - it will not rot, swell, or warp, ensuring cills continue to perform and look sharp over time.

With the correct powder coating specification, aluminium window sills withstand Irish weather conditions, including exposed and coastal environments, while requiring minimal maintenance. The wide range of colour and finish options also allows sills to be closely matched to window frames, cladding, or façade materials, supporting a cohesive, high quality architectural appearance.

Need Window Sills?

Send on your drawings and we’ll price it up.

Share your drawings, take-offs, or a brief specification and we’ll confirm pricing and lead time.

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Benefits of Aluminium Window Sills

Accurate Fabrication To Match Your Drawings

Each sill is pressed and folded to suit your sizes, projections, and returns, supporting a clean fit at the opening and consistent window lines across the exterior.

Neater Detailing At Edges & Returns

Pressed aluminium supports sharp edges and accurate returns for a more refined window detail. This helps maintain clean transitions between frame, reveal, and facade.

Water Diversion From The Facade

Lightweight, Strong, & Practical to Fit

Aluminium supports efficient handling and accurate fixing on site, while still providing the strength required for external use.

Flexible Coating & Colour Matching

Finishes available in industrial strength powder coating supports colour matching with nearby trims and surrounding facade details, helping maintain a consistent appearance across the exterior.

Excellent Durability

Unlike timber or other materials, aluminium remains stable over time. It will not rot, swell, or distort, helping maintain both function and appearance.

Aluminium Window Sills FAQs

1What details should be specified for aluminium window sills?
Aluminium window sills should be specified with the required length, projection, fall, drip detail, returns, finish and colour. The wall build up and window position should also be considered so the sill performs correctly and gives a clean external finish.
2Why choose aluminium window sills for external openings?
Aluminium is strong, lightweight and low maintenance. It will not rot, swell or warp, and it can be folded into precise profiles with clean lines, accurate falls and neat drip details.
3Are aluminium window sills made to measure?
Yes. We manufacture aluminium window sills to suit the sizes, projections and returns required for each project. This helps create a clean fit at the opening and a consistent finish across the building.
4Can CS Fabrication powder coat aluminium window sills?
Yes. We can powder coat aluminium window sills in a wide range of colours to match or complement window frames, cladding, cappings and other external metalwork.
5How do aluminium window sills manage rainwater run off?
Aluminium window sills can be folded with the right fall, projection and drip detail to help direct rainwater away from the façade and reduce water tracking back towards the wall.
6Are aluminium window sills suitable for Irish weather?
Yes. Aluminium is well suited to external use in Ireland when finished to the right specification. It is durable, stable and resistant to common weather related issues such as rotting, swelling or warping.
7Are aluminium window sills suitable for external insulation projects?
Aluminium window sills can be manufactured with deeper projections where required, which may suit projects involving external insulation. The correct sill size will depend on the finished wall build up, so drawings or measurements should be provided before fabrication.
8What information is needed to price aluminium window sills?
To price aluminium window sills, we usually need the sill lengths, projections, quantities, colour, finish and any required returns or special details. Drawings, take offs or a brief specification are helpful.

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