Aluminium Cills

Aluminium Cills

As a part of our provision of facades for large scale residential blocks and estates, JB Products manufactures bespoke PPC aluminium window cills.

Our cills are made in alignment with the overall facade design for the building, with the aim of increasing protection of exterior wall  systems and adding unlimited aesthetic value.


Why JB Products?

JB Products expertly combines functionality with aestheticism whilst fabricating facade products, ensuring our dedicated team works to high standards to achieve total customer satisfaction. We pride ourselves on the quality of our products and honesty of our work whilst doing so, ensuring our products continue to deliver throughout their lifecycle. And, if something goes wrong, the team at JB Products are always on hand to provide assistance.


For all types of aluminium, stainless and galvanised steel products, JB Products begins with a thorough site survey and design process, working alongside quantity surveyors, architects, and other construction specialists to determine project specifications. Our in-house design team is equipped with CAD software to ensure products meet the requirements of their application going forward.

Our floor-level manufacturing capabilities are enabled by our comprehensive facilities and manual and CNC machinery, capable of producing consistent and accurate parts to within tight tolerances. JB Products further supports clients throughout the cutting, forming, assembly, and finishing of products, advising the best course of action throughout.

Material Gauges

We work with material gauges from 0.70-10.00mm, starting from 1.2mm for aluminium products.

JB Products onsite services are enabled by our accredited delivery and installation team, allowing us to provide a complete service from beginning to end. Our services are provided for clients throughout the UK.

Aluminium Cills | JB Products

FAQ's - Aluminium Cills

An aluminium cill is a common type of external window cill - which is the ledge that sits at the bottom of a window frame. A cill helps redirect water to ensure it cannot penetrate or damage external walls; they are typically installed on an angle to allow for rain and snow to run off away from the wall. Window cills moreover play a structural role through stabilising the bottom of the window. 

This is an essential feature on small and large scale residential and commercial buildings alike.

A window cill should have enough overhang so that rain or snow drips away from the external wall; this is typically 25mm from the face of the wall as a minimum.  

There are various types of window cills, which may be chosen depending on the facade of the building. 

Window cill types include: 

  • Wood - wood offers a more traditional look, though is susceptible to weather damage
  • Aluminium - this metal is economic for large builds, with great corrosion resistance 
  • Plastic - plastic such as uPVC has good corrosion resistance, however has reduced strength compared to aluminium 
  • Stone - stone offers a traditional look, however may be more expensive 

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