Complex & Bay Aluminium Cills – Measured and Designed in Minutes
Complex & Bay Aluminium Cills – Measured and Designed in Minutes
At Cills.ie, we make ordering complex bay and angled cills simple. Instead of struggling with drawings, phone calls, and manual calculations, our app lets you measure, draw, and design angled cills directly on your device. Every cill is made-to-measure, powder-coated in any RAL colour, and manufactured with precision
At Cills.ie, we make ordering complex bay and angled cills simple. Instead of struggling with drawings, phone calls, and manual calculations, our app lets you measure, draw, and design angled cills directly on your device. Every cill is made-to-measure, powder-coated in any RAL colour, and manufactured with precision
What are Complex or Bay Cills?
A complex cill (also called a bay cill) is an aluminium window cill designed for angled or multi-part window openings.
A complex cill (also called a bay cill) is an aluminium window cill designed for angled or multi-part window openings.
A complex cill (also called a bay cill) is an aluminium window cill designed for angled or multi-part window openings.
They are commonly used on:
Bay windows
Angled façades
Corner windows
Non-standard openings
Traditional suppliers make bay cills difficult to order — you need drawings, degrees, and lots of back-and-forth. With Cills.ie, it’s done in minutes.
Complex Aluminium Window Cill Preview - Design in any RAL Color
Benefits of Complex Aluminium Cills from Cills.ie
Angles made easy – draw and measure directly in the app.
Faster turnaround – no need for external drawings.
Powder-coated finishes – full RAL range available.
Custom fit – designed for bay, angled, and corner windows.
Engineer-validated – checked before production.
Custom Powder-Coated Colours for Every Aluminium Profile
Custom Powder-Coated Colours for Every Aluminium Profile
Match any facade with RAL-certified powder coating. Our aluminium window cills, flashings, cappings, and trims are made-to-measure and finished in your exact colour - ideal for retrofit/EWI projects in Ireland and modern new builds. Preview shades in real time and order digitally for fast delivery.
Match any facade with RAL-certified powder coating. Our aluminium window cills, flashings, cappings, and trims are made-to-measure and finished in your exact colour - ideal for retrofit/EWI projects in Ireland and modern new builds. Preview shades in real time and order digitally for fast delivery.
RAL 7016
Slate Grey
RAL 7016
Slate Grey
RAL 7016
Slate Grey
RAL 7015
Archraclte Grey
RAL 7015
Archraclte Grey
RAL 7015
Archraclte Grey
RAL 7032
Pebble Grey
RAL 7032
Pebble Grey
RAL 7032
Pebble Grey
RAL 7044
Sild Grey
RAL 7044
Sild Grey
RAL 7044
Sild Grey
RAL 8028
Terra Brown
RAL 8028
Terra Brown
RAL 8028
Terra Brown
RAL 9003
Signal White
RAL 9003
Signal White
RAL 9003
Signal White
RAL 1000
Jet Black
RAL 1000
Jet Black
RAL 1000
Jet Black
RAL 1001
Green Beige
RAL 1001
Green Beige
RAL 1001
Green Beige
RAL 1002
Beige
RAL 1002
Beige
RAL 1002
Beige
RAL 1003
Sand Yellow
RAL 1003
Sand Yellow
RAL 1003
Sand Yellow
RAL 1004
Signal Yellow
RAL 1004
Signal Yellow
RAL 1004
Signal Yellow
RAL 1005
Honey Yellow
RAL 1005
Honey Yellow
RAL 1005
Honey Yellow
RAL 1006
Maize Yellow
RAL 1006
Maize Yellow
RAL 1006
Maize Yellow
RAL 1007
Daffodil Yellow
RAL 1007
Daffodil Yellow
RAL 1007
Daffodil Yellow
RAL 1008
Brown
RAL 1008
Brown
RAL 1008
Brown
RAL 1009
Yellow
RAL 1009
Yellow
RAL 1009
Yellow
RAL 1010
Cream
RAL 1010
Cream
RAL 1010
Cream
RAL 1011
Beige
RAL 1011
Beige
RAL 1011
Beige
RAL 1012
Light Beige
RAL 1012
Light Beige
RAL 1012
Light Beige
RAL 1013
Dark
RAL 1013
Dark
RAL 1013
Dark
RAL 1014
Maroon
RAL 1014
Maroon
RAL 1014
Maroon
Why choose
Cills.ie?
Any RAL colour: hundreds of architectural finished with UV-stable, durable coating.
Perfect matching: on-side measuring devices capture the exact RAL shade for windows and facades.
Made-to-measure aluminium: precision fabrication for cills, bay/angled cills, parapet cappings & weatherproof flashings.
Retrofit-ready: designed for SEAI external wall insulation systems with clean, watertight detailing.
Order in minutes: measure, preview colour, and track manufacturing & delivery inside the app.
Our Projects
Our Projects
Match any facade with RAL-certified powder coating. Our aluminium window cills, flashings, cappings, and trims are made-to-measure and finished in your exact colour.
Match any facade with RAL-certified powder coating. Our aluminium window cills, flashings, cappings, and trims are made-to-measure and finished in your exact colour.
External Wall Insulation Retrofit, Dublin
Retrofit contractor avoided thermal bridging, passed SEAI inspection, and completed the project on schedule. The powder-coated finish matched perfectly with the windows and façade.
Bay Window Installation, Cork
Using our app, the builder measured and ordered a bay cill with angles in minutes. Manufactured and delivered within the week, ensuring a perfect fit for a tricky corner window detail.
Commercial Fit-Out, Galway
Architects achieved a sharp, modern look with seamless aluminium detailing. The parapet walls were protected with powder-coated cappings, ensuring long-term durability against weather.
External Wall Insulation Retrofit, Dublin
Retrofit contractor avoided thermal bridging, passed SEAI inspection, and completed the project on schedule. The powder-coated finish matched perfectly with the windows and façade.
Bay Window Installation, Cork
Using our app, the builder measured and ordered a bay cill with angles in minutes. Manufactured and delivered within the week, ensuring a perfect fit for a tricky corner window detail.
Commercial Fit-Out, Galway
Architects achieved a sharp, modern look with seamless aluminium detailing. The parapet walls were protected with powder-coated cappings, ensuring long-term durability against weather.
External Wall Insulation Retrofit, Dublin
Retrofit contractor avoided thermal bridging, passed SEAI inspection, and completed the project on schedule. The powder-coated finish matched perfectly with the windows and façade.
Bay Window Installation, Cork
Using our app, the builder measured and ordered a bay cill with angles in minutes. Manufactured and delivered within the week, ensuring a perfect fit for a tricky corner window detail.
Commercial Fit-Out, Galway
Architects achieved a sharp, modern look with seamless aluminium detailing. The parapet walls were protected with powder-coated cappings, ensuring long-term durability against weather.
External Wall Insulation Retrofit, Dublin
Retrofit contractor avoided thermal bridging, passed SEAI inspection, and completed the project on schedule. The powder-coated finish matched perfectly with the windows and façade.
Bay Window Installation, Cork
Using our app, the builder measured and ordered a bay cill with angles in minutes. Manufactured and delivered within the week, ensuring a perfect fit for a tricky corner window detail.
Commercial Fit-Out, Galway
Architects achieved a sharp, modern look with seamless aluminium detailing. The parapet walls were protected with powder-coated cappings, ensuring long-term durability against weather.
External Wall Insulation Retrofit, Dublin
Retrofit contractor avoided thermal bridging, passed SEAI inspection, and completed the project on schedule. The powder-coated finish matched perfectly with the windows and façade.
Bay Window Installation, Cork
Using our app, the builder measured and ordered a bay cill with angles in minutes. Manufactured and delivered within the week, ensuring a perfect fit for a tricky corner window detail.
Commercial Fit-Out, Galway
Architects achieved a sharp, modern look with seamless aluminium detailing. The parapet walls were protected with powder-coated cappings, ensuring long-term durability against weather.
External Wall Insulation Retrofit, Dublin
Retrofit contractor avoided thermal bridging, passed SEAI inspection, and completed the project on schedule. The powder-coated finish matched perfectly with the windows and façade.
Bay Window Installation, Cork
Using our app, the builder measured and ordered a bay cill with angles in minutes. Manufactured and delivered within the week, ensuring a perfect fit for a tricky corner window detail.
Commercial Fit-Out, Galway
Architects achieved a sharp, modern look with seamless aluminium detailing. The parapet walls were protected with powder-coated cappings, ensuring long-term durability against weather.
External Wall Insulation Retrofit, Dublin
Retrofit contractor avoided thermal bridging, passed SEAI inspection, and completed the project on schedule. The powder-coated finish matched perfectly with the windows and façade.
Bay Window Installation, Cork
Using our app, the builder measured and ordered a bay cill with angles in minutes. Manufactured and delivered within the week, ensuring a perfect fit for a tricky corner window detail.
Commercial Fit-Out, Galway
Architects achieved a sharp, modern look with seamless aluminium detailing. The parapet walls were protected with powder-coated cappings, ensuring long-term durability against weather.
External Wall Insulation Retrofit, Dublin
Retrofit contractor avoided thermal bridging, passed SEAI inspection, and completed the project on schedule. The powder-coated finish matched perfectly with the windows and façade.
Bay Window Installation, Cork
Using our app, the builder measured and ordered a bay cill with angles in minutes. Manufactured and delivered within the week, ensuring a perfect fit for a tricky corner window detail.
Commercial Fit-Out, Galway
Architects achieved a sharp, modern look with seamless aluminium detailing. The parapet walls were protected with powder-coated cappings, ensuring long-term durability against weather.
External Wall Insulation Retrofit, Dublin
Retrofit contractor avoided thermal bridging, passed SEAI inspection, and completed the project on schedule. The powder-coated finish matched perfectly with the windows and façade.
External Wall Insulation Retrofit, Dublin
Retrofit contractor avoided thermal bridging, passed SEAI inspection, and completed the project on schedule. The powder-coated finish matched perfectly with the windows and façade.
Bay Window Installation, Cork
Using our app, the builder measured and ordered a bay cill with angles in minutes. Manufactured and delivered within the week, ensuring a perfect fit for a tricky corner window detail.
Bay Window Installation, Cork
Using our app, the builder measured and ordered a bay cill with angles in minutes. Manufactured and delivered within the week, ensuring a perfect fit for a tricky corner window detail.
Commercial Fit-Out, Galway
Architects achieved a sharp, modern look with seamless aluminium detailing. The parapet walls were protected with powder-coated cappings, ensuring long-term durability against weather.
Commercial Fit-Out, Galway
Architects achieved a sharp, modern look with seamless aluminium detailing. The parapet walls were protected with powder-coated cappings, ensuring long-term durability against weather.
Frequently Asked
Questions
Have another question? Please contact
our team!
What is a bay or complex cill?
An angled or multi-part aluminium cill designed for bay and corner windows.
What is a bay or complex cill?
An angled or multi-part aluminium cill designed for bay and corner windows.
What is a bay or complex cill?
An angled or multi-part aluminium cill designed for bay and corner windows.
How do I order a complex cill?
How do I order a complex cill?
How do I order a complex cill?
Do I need drawings?
Do I need drawings?
Do I need drawings?
Which windows are your cills compatible with?
Which windows are your cills compatible with?
Which windows are your cills compatible with?
Can I order complex cills in colour?
Can I order complex cills in colour?
Can I order complex cills in colour?
Start Ordering Aluminium Window Cills Today
Cills.ie makes it easy to measure, customise, and order aluminium cills, flashings, trims, and cappings — all online, with engineer support included.
