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Concrete Cills

Concrete cills provide a durable, weather-resistant finish to window and door openings, protecting the masonry below from water ingress and structural damage. These precast elements channel rainwater away from the building envelope, preventing moisture penetration that can lead to damp, staining, and long-term deterioration of brickwork and blockwork.

Our Precast Window Cill Selection

McMahons stocks a comprehensive range of cill profiles to suit residential, commercial, and restoration projects across Ireland.

  • Concrete window cills 10x2 inch - wedge-shaped precast concrete window cills with a smooth finish, designed for external use beneath window openings. The angled profile forms a drip edge that channels rainwater clear of the wall face, protecting windows and the surrounding masonry from water damage. Available in four lengths: 3ft 6in, 4ft 6in, 6ft, and 6ft 6in, to suit a range of standard window widths.
  • Concrete plain panel 300mm x 1.8m - a precast concrete base panel designed to slot into concrete fence posts, used as a gravel board beneath timber fence panels to prevent ground contact and rot, or built up to form a solid concrete panel boundary. Suitable for use alongside standard slotted concrete fence posts.

Browse our complete Lintels & Cills collection to source matching Concrete Lintels for a cohesive structural package.

When selecting the right cill, consider your wall construction type, the reveal depth of your openings, and whether stooled or slip profiles best suit your build method. For exposed sites, throated options with generous projection offer superior weathering performance.

Why Choose McMahons for Your Cill Requirements?

With over 190 years serving Irish builders, our team understands the practical demands of site work. We carry stock from trusted Irish manufacturers, ensuring consistent quality and availability when you need it. Whether you're completing a single residential build or fitting out multiple units, we can advise on specifications and arrange delivery to suit your programme. Speak to one of our experts to discuss quantities and lead times for your project.