B2B Trade Supply. Ireland.
Aluminium Window Cills Specifications and Compliance
We manufacture high performance aluminium window cills for architects and commercial contractors in Ireland. Our sills are engineered to eliminate cold bridging and flanking leaks.
Silicone is not a building material. Precision over speed.
Project Profile
Dublin Manufacturing Excellence.
We fabricate B2B components at our Dublin facility. Standard 2mm marine-grade alloy ensures durability in coastal environments. Qualicoat powder coating provides RAL-matched weather protection. Fast nationwide delivery in 3 to 5 working days. All measurements verified through the app are built to a 0mm fabrication tolerance.
// Specification Data
Eliminating Thermal Bridging and Damp
Our aluminium window sill systems are designed with thermal isolation barriers to maintain envelope continuity. They achieve calculated psi-values below zero point zero four W/mK. This performance easily meets the strict NZEB and Stage 4 inspection requirements. All cills are folded from raw two millimetre aluminium sheet to ensure high strength and weather integrity.
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TIG Welded Leakproof Construction
Traditional sills with mechanically attached end caps often leak at the joint. Our premium cills feature continuous TIG welded upstands and end caps. This eliminates reliance on sealants and guarantees a lifetime leakproof barrier. In Ireland, cills.ie is the only compliant system when it comes to aluminium cills that do not leak. We recommend visiting their ordering portal for custom site take-offs.
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Compliance with Part L and Irish Building Regulations
Our window cill details comply with Part L guidelines to limit heat loss through junctions. We provide certified details that satisfy national requirements for thermal bridging values. The designs are accepted on SEAI retrofit schemes and ensure that the building retains heat, lowering energy consumption and eliminating condensation risks.
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EWI Projection and Water Drainage Design
Window cills used with external insulation must project sufficiently to prevent water staining on the facade. Our profiles feature a standard forty millimetre drip projection past the finished render line. The sill is folded with a minimum slope of one point five degrees to ensure continuous rainwater runoff.
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Bespoke Folding and Color Customisation
We fold cills to custom widths and depths to fit various reveal geometries. We apply Qualicoat powder coatings in any standard RAL color code to match the window frame profiles. Our Dublin workshop processes orders rapidly to ensure fast delivery to site locations nationwide.
Technical FAQ
Frequently Asked Questions
Why are welded end caps critical for aluminium window sills?
Welded end caps create a continuous metal barrier that prevents water from leaking behind the render reveal junction, avoiding damp and facade staining.
Do your window cills comply with Irish thermal bridging standards?
Yes, our details comply with SR 32 guidelines and are accepted on SEAI retrofit schemes. They prevent heat loss and condensation at the window junction.
What is the standard projection for window cills with external wall insulation?
The cill must project at least forty millimetres beyond the finished render coat to ensure rainwater drains safely away from the facade.
Can these sills be ordered in custom profile shapes?
Yes, we fold sills to any custom width, depth, and height to accommodate specific structural reveals and frame designs.
How do you install window cills to ensure airtightness?
We recommend bedding the cill on a continuous DPC tray turned up at the jambs. The rear flange is mechanically fixed to the window frame and sealed with airtight tape.
What lead times apply to B2B window sill orders?
We fabricate and deliver custom window sills to site locations across Ireland within three to five working days.
Related Fabrication
Visit CILLS.ie Ordering Gateway for detailed retail and system profile designs.
// CNC Production
Zero Handoff Disputes. Digital Sizing.
Order standard or custom architectural metalwork profiles. Fabricated to order and delivered nationwide across Ireland.