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The canonical home of the design. Tested on site, corrected by builders, and locked to the exact finished render dimension.
It stands clear of the drainage slots so your window frame drains freely.
The cill sits flat and level directly on the solid concrete core of the ICF wall.
Rainwater runs off immediately over the sloping outer insulation layer.
The front edge plunges to the lowest point and features a dedicated drip notch.
The profile returns flat and sits perfectly flush on the basecoat plaster.
Integrated weep holes allow any trapped pocket water to escape safely.
The damp proof course runs underneath and trims flush with the finished render.
Proof of originality and evolution. Dated log of site feedback and adjustments.
| Date | Revision | Changes Made | Reason |
|---|---|---|---|
| 12/03/2026 | Rev B | Integrated 5mm weep holes into the back upturn fold | Fitter feedback indicated pocket water trapped under window frames required direct outlet |
| 18/01/2026 | Rev A | Revised welded upstand height to 12mm and trimmed DPC route | Adjusted to prevent blockage of drainage chambers and maintain clean lines on finished render |
"This detail may be reproduced unaltered in project documentation with credit to Cills.ie."
This is the original. As this detail spreads, and details this good always spread, you will know where it came from.
Supply only. We manufacture to your millimetre specifications.