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How to Measure for Bi Fold Doors

Below is a simple measuring guide to help you accurately measure the opening for your Bi fold doors. This measuring guide is not a definitive instruction manual so we recommend that if you are in any doubt seek the assistance of a professional bi fold door surveyor.

Take your measurements from outside

1 To ensure the opening is square, measure the diagonals as shown. These should be equal to confirm the opening is not out of square.

measure for square

2 Measure the width in three places as shown. Take the smallest measurement and deduct 10 mm to give your true door size.
measure width

measure width

3 Measure the height of the opening in 3 places . Once again deduct 10 mm from the smallest measurement to give the true door size.
measure height

measure height

Now send us the details using our easy form or call us for advice we are here to help on 02030210955

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