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The purpose of an external sill is to take any water away from the door, so it doesn’t make its way into your property. If your door is sat directly on the brickwork, you will need a sill because the brickwork is a flat surface. Water won’t go away on its own, so we recommend a sill. If your sliding patio door is installed onto an existing sill made of stone or concrete, this should drain water away on its own without the need for an external sill. We recommend that you discuss this with your installer to ensure that no errors are made during the process.
Please note, our news articles are relevant and accurate at the time of release, but as technical developments dictate, and times goes by the information in this article may no longer be applicable. If you have questions, please contact us using our online contact form or call us on 03332 412 240.