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Precision fabricated aluminium cills designed for Insulated Concrete Form envelopes. Zero guessing. Sized to your finished render.
ICF construction demands absolute precision at the window openings.
Standard window cills do not work on insulated building envelopes. They block frame drainage slots and leave gaps in the outer insulation. We solved this problem by creating a dedicated cill detail that fits perfectly every single time.
This is a supply-only trade service. We manufacture cills from premium 2mm marine-grade aluminium in our Dublin workshop and ship them nationwide. Explore the detail, read our design story, and discover why serious Irish contractors rely on Cills.ie.
Watch this step-by-step video guide showing how to measure and order custom aluminium sills from your phone using Cills.ie.
The canonical section drawing and revision history. Study the 12mm welded upstands, flat landings, DPC tray routes, and 5mm weep holes.
Learn why standard sheet metal shops fail ICF projects. Discover how we built a category of one by locking dimensions to the finished render.
The honest, build-in-public story. From initial building code research and laboratory tests to fitter corrections and manufacturer listings.
Please note that all ICF window cills and capping profiles are sold as supply-only. We do not provide installation services. We manufacture to your exact measurements, and you manage the fitting on-site.
Create a free account, choose your ICF block brand, and lock in your order.