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Measure the width of the hole in three places. Take the smallest measurement and deduct 10mm, this will give you the measurement of your doors.
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How to Self Survey
Measuring the Hole for your Bifold Doors or Sliding Doors
1
Measure from corner to corner. This will tell you whether or not your hole is square. If the two measurements are equal the hole is square.
3
Measure the height in three places, take the smallest measurement again and deduct 10mm. Now you have the height of your new doors.
Don't forget, if you are going to make the threshold flush with your inside floor level, then you need to take the threshold height into account. The PDF drawings for these can be found on the product pages.
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