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Slip Sills (Cills)


Concrete Slip Sills produced from fine grade reconstituted cast stone. This versatile Stock product is often used with our stock corner units to create Bay Window Sills or to extend the Lengths of our Stooled Cills.

Stock Slip Cill in Bathstone buff colour

Slip Cill

Slip Cill Dimensions

Slip Cill

2024 Stock Stone Prices (Trade)

Length excl. VAT incl. VAT
1115mm £131.65 £157.98

Product Overview and Specification

  • Availability, usually just 2 to 4 working days from payment although may take a little longer due to Covid disruption
  • Stooled Cills, Bay Windows and Render Cills also available
  • Option for ex-stock collection from ST3 5BL on commercial vehicles; or nationwide delivery can be arranged at additional cost
  • Suitable for timber frame or conventional brick and block construction
  • Components manufactured with through coloured cast stone mix allowing for easier cutting to length on site
  • Stock components supplied in Bathstone buff colour
  • Additional colours produced on made to order basis (click here)
  • Reproduction of product colour is as close as is possible within the limits of photographic technology

Slip Cills can be used as a central section for our two-piece Stooled Stone Cills to create longer unit lengths or fitted alongside our angle blocks to easily create Bay Window details. Produced from dry-cast concrete in Bath Stone colour, they complement most brick shades. These slip cills are STOCK items enabling rapid turnarounds and are frequently used together with our matching Stock Window Heads and Stone Quoins by Professional Builders, Self Builders and Developers.

Our stock concrete slip sills have a sloping face to assist with water run-off and benefit from a drip grove to the underside helping rain water drip away from the sill edge and also from the property walls. Other lengths can be supplied but 1115mm is the stock size, casting bespoke slip cill lengths can take around 6 weeks.

We deliver across the UK, and for really Urgent jobs Same Day Collection of concrete slip sills is normally available.

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