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What is a Cill?

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The cill is the part at the bottom of the door that projects out. The cill’s main purpose is to take rain water away from brickwork underneath. Decking and patio slabs can be laid over the cill and up to the edge of the threshold if required.

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Supplying and Installing Bi-fold Doors & Sliding Doors to the South West & Wales

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Name & Registered Office: Bristol Bi-fold and Sliding Doors Limited, Old Green Farm, Earthcott Green, Alveston, Bristol, South Gloucestershire, United Kingdom, BS35 3TD. Company Number: 06922945. VAT Registration Number: 978658538. Web design by Blazen Web Marketing - About this website