Aluminium Window Sills, Parapet Cappings and Architectural Fabrication Specialists in Ireland

Cills.ie is a Dublin-based aluminium fabrication company supplying contractors, builders and developers across Ireland with precision-made aluminium window sills, aluminium parapet cappings, fascias, soffits, rainwater goods, and bespoke architectural aluminium fabrications. Every product is manufactured to your exact measurements in our workshop in Inchicore, Dublin 10 and delivered nationwide.

We exist because measurement errors cost contractors real money. A wrong aluminium sill means a reorder, a delay, a wasted day waiting on materials while a job stalls. Cills.ie was built to eliminate that problem entirely — with a smarter ordering system, a dedicated manufacturing team, and a fitting service that covers the whole process from site to finish.

Three services. One team. One less thing to worry about.

Most aluminium suppliers hand you a product and leave you to figure out the rest. Cills.ie offers three fully integrated services under one roof: measuring, manufacturing, and fitting. You can use one, two, or all three depending on your job. Whether you need a full supply-and-fit of aluminium window sills on a new build or a one-off parapet capping for a retrofit, we handle it.

• Measuring — on-site measurement service or guided self-measurement via the Cills.ie app with live 3D preview
• Manufacturing — all products fabricated to exact specification in our Dublin workshop
• Fitting — professional installation by our own team, fully coordinated with your site schedule

Measure aluminium window sills from your phone

The Cills.ie app changes how contractors order aluminium sills on site. Open the app, follow the step-by-step measurement guide, and watch your exact cill profile update live in 3D as you input your dimensions. No sketches, no phone calls, no emailed photos of a tape measure against a window reveal. You see the product before you order it. If the shape is wrong, you fix it before it goes into production — not after it arrives on site.

The app handles complex shapes too. Bay cills, splayed returns, double-check throats, non-standard angles — configurations that would normally require back-and-forth with a fabricator can be configured and ordered in minutes. Once it is made, it is made. The app makes sure you get it right first time.

Aluminium products we manufacture

We produce the full range of external architectural aluminium products. Our standard range covers the most common specifications used in Irish construction, and our bespoke fabrication service handles anything outside that range.

• Aluminium window sills — standard and complex profiles
• Aluminium parapet cappings — flat, angled and tapered
• Bay window cills and splayed cill returns
• Aluminium fascias and soffits
• Aluminium rainwater goods — gutters, downpipes and hoppers
• Bespoke aluminium fabrications to drawing or specification
• Aluminium copings and architectural trims

Built for EWI, retrofit and new build projects

Aluminium window sills and parapet cappings are critical finishing elements on External Wall Insulation (EWI) and retrofit projects. The sill has to sit correctly over the new insulation build-up, shed water cleanly, and protect the insulation edge. Get the profile wrong and you risk water ingress, insulation damage, and a callback.

Cills.ie manufactures aluminium sills specifically suited to EWI installations — with the correct drip edge, throat depth, and upstand dimensions to match the insulation thickness on your job. Our team understands the tolerances involved and fabricates accordingly. We also supply aluminium parapet cappings for flat roof parapets, balcony edges, and exposed wall tops where weatherproofing is critical.

For new build projects, we work with developers and main contractors to supply and fit aluminium window sills, fascias, soffits and rainwater goods across full housing schemes and apartment blocks. We can schedule delivery in phases to match your programme.

Why contractors choose Cills.ie

• Measure aluminium window sills on site from your phone with guided step-by-step instructions
• See your exact sill profile in live 3D before placing the order — no surprises on delivery
• Complex shapes including bay cills, returns and non-standard angles handled with ease
• Full product range — aluminium sills, parapet cappings, fascias, soffits, rainwater goods and bespoke fabrications
• No reorders, no wasted days, no wrong products — just the right aluminium, first time
• Manufactured in Dublin and dispatched fast to keep your job on programme
• Measuring, manufacturing and fitting all handled by one team — less coordination, fewer problems
• Bespoke fabrication service for non-standard specifications and architectural details
• Nationwide delivery across Ireland

Aluminium that does not forgive guessing

Aluminium is a precision material. Once it is cut and formed, it cannot be adjusted on site. A sill that is 10mm too narrow, a capping with the wrong drip edge, a fascia cut to the wrong angle — these are not fixable problems. They are reorder problems. And reorders cost time, money and credibility on site.

Cills.ie exists to make sure that does not happen. Our measurement system, our manufacturing process, and our fitting service are all designed around one outcome: the right aluminium product, installed correctly, first time.

Based in Inchicore, Dublin 10. Office: +353 1 223 8774. Nationwide delivery across Ireland. Visit cills.ie to measure and order online.