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How Much Does Exterior Window Sills Cost in Ireland? (2026 Guide) | Aluminium Cills Ireland
How Much Does Exterior Window Sills Cost in Ireland? (2026 Guide)
Exterior window sills (or cills) are the primary barrier protecting your home's facade from moisture and rain damage. If you are budgeting for a build or insulation retrofit, understanding supply and labor costs is key.
In Ireland in 2026, exterior window sills cost between €30 and €150 per window for materials (depending on whether you select concrete, granite, or marine-grade aluminium) and €150 to €300 per window for professional installation labor.
Supply-Only Cost Breakdown per Window (1.5m standard)
- Standard PVC Exterior Sill (€20 - €45): Lightweight and cheap, but prone to UV degradation and warping over time.
- Precast Concrete Exterior Sill (€45 - €80): Heavy and traditional, but incurs high delivery costs and acts as a severe thermal bridge.
- Silver Granite Exterior Sill (€95 - €160): Stunning appearance and durable, but heavy to install and highly expensive.
- 2mm Marine-Grade Aluminium Sill (€70 - €120): Folded to exact millimeter specifications, lightweight, thermal-break compatible, and available in any RAL color finish.
Installation Cost Considerations
- Scaffolding: Upper-level windows require scaffolding for safe fitting, adding €100 to €300 to the project setup cost.
- EWI Reveal Adjustments: If you are retrofitting External Wall Insulation, standard sills must be extended. Aluminium over-cills can be fitted over existing sills, cutting fitting labor costs by up to 50% compared to chopping out concrete.
- Location: Labor rates in Dublin city (Dublin 1 to Dublin 24) are generally 15-25% higher than in rural areas in Connacht or Munster.
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"Fabricator.ie and the Cills app have completely transformed our window sill specification. By scanning reveals and locking in 3D dimensions, we eliminated ordering errors entirely. Site measurement and fitting services are flawless."
"For retrofitted external insulation, reveal depths vary constantly. The ability to configure deep reveal aluminium cills (350mm+) with exact welded stop-ends and receive them in 3-5 days is a game changer for our schedules."
"We specify Fabricator.ie for our high-end residential and commercial projects. Their 2mm marine-grade alloy and Qualicoat powder coating finishes meet our strict specifications for coastal wind-load and salt-spray protection."
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Frequently Asked Questions
Can I share or duplicate this technical guide?
Yes, our technical guides are free to share under standard attribution, designed to assist contractors, specifiers, and architects in Ireland.
How do I implement these aluminium specifications on my project?
You can download our CAD files or configure the dimensions directly on the Cills app to match the instructions in these guides.