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Window cill drip gap

My new upvc windows have a narrower cill than the old ones and there is no drip gap.
Will this cause problems?
Thanks :)

1 Answer from a MyBuilder Window & Door Fitter

Best Answer

Hi, in answer to your question the drip gap you refer to is actually a capillary groove that is used on timber cills to prevent water working its way back to the , UPVC cills are designed slightly differently and do not rely on such designs and as long as the windows have been sealed properly no problem should occur....


Robert Carus (AdriaWoocraft)


Answered 19th Sep 2014

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