Products // PROD_07
ICF Window Sills | Made-to-Measure Aluminium Sills
Specialized aluminium window sills designed specifically for Insulated Concrete Formwork (ICF) systems. Extra deep profiles, thermal break details, and watertight seals.
Overview
Precision Engineered Aluminium Cills
Insulated Concrete Formwork (ICF) construction presents unique weathering and detailing challenges at window openings. Because ICF walls are significantly thicker than traditional cavity walls (often requiring reveal depths of 250mm to 400mm+), standard window sills are insufficient. We fabricate extra-deep aluminium sills tailored to ICF profiles, integrating specialized fixing flanges, custom-bent drip edges, and insulated backing. Our ICF sills prevent cold-bridging, protect the exposed EPS foam core from moisture, and guarantee a watertight, windproof reveal seal that integrates seamlessly with your rendering or cladding finish.
This product is configured and priced dynamically. To order this exact detail to your millimetre measurements, please download the Cills app or visit Cills.ie.
Technical Specs
Irish Fabrication & Coating Standards
- 01
Depth capacity
Custom depths from 200mm up to 600mm+ to cover deep ICF reveals
- 02
Thermal detail
Optional thermal-break gaskets to prevent cold bridging to the internal reveal
- 03
Fixing system
Pre-drilled rear fixing flanges for secure anchoring to the window frame or concrete core
- 04
Material
2.0mm heavy-duty marine-grade aluminium
- 05
End details
High-sided welded stop ends to prevent water draining into the EPS reveals
// Product Feedback
What Contractors Say About ICF Window Sills
Trade-tested reviews for our icf window sills specifications.
"Superb quality icf window sills! The Cills app made it easy to specify exact reveal dimensions on site. We saved hours in measuring and fitting."
"Fabricated precisely to our specifications. Ideal thickness for deep insulation reveals and EWI terminations. Delivered to our site within 4 days."
"Excellent finish and total consistency. Fits behind the window frame perfectly with zero rattle or bowing under thermal expansion. Highly recommend for any commercial build."
// Product FAQ
Frequently Asked Questions
How do ICF window sills prevent cold-bridging?
They are fabricated with high-performance thermal break gaskets that decouple the outer aluminium skin from the internal window frame.
What reveal depths are supported for Insulated Concrete Formwork?
We manufacture deep-reveal profiles up to 600mm to accommodate thick EPS insulation layers on ICF structures.
How do you seal the edges against render cracking on ICF?
Our ICF sills are supplied with high-sided welded stop-ends and render trims that prevent moisture from leaking into the EPS foam core and protect render boundaries.
// Complete System
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// Core Principle
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// Ready to Order
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In Minutes
Configure your made-to-measure icf window sills in 3D. Delivered nationwide in 3 to 5 days.