How to fix a leaky window

Over years of use window handles can become loose and lose the initial tension they had. This is not a problem that requires a specialist and can be resolved through the use of a screwdriver, this can be a phillips or flathead and will vary depending on where the window is from.

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Step One: Identify The Draining Port

Traditionally uPVC windows will have a small hole along the base of the window channel. They can usually be found within the bottom right or left corner and are small in size.

Step Two: Testing For Blockages

To test your draining port for blockages use a long, thin object such as a screwdriver or chisel and gently wiggle left and right. If there are any blockages you should be able to feel some resistance in this motion. If you’re still unsure after this use a small cup of water and pour it into the hole. The water should slowly drain out of the front of the window frame.

Step Three: Cleaning Blockages

Blockages should be removed using a thin hoover attachment or brush to ensure no damage occurs to the window channel. Once blockages are removed test again with a small cup of water to double check there is no remaining dirt.

Watch our helpful video below for a step by step guide on how to clean a window's drainage holes. Remember to always take extra care to avoid any damage.

Video transcript

uPVC windows have drainage holes on the inside. To make sure that moisture can escape you'll occasionally need to dust or vacuum this area. Check the blockages using a thin screwdriver, gently insert it and slowly move it side to side. You can check if the opening is clear by pouring some water down the channel.

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