Measuring up for aluminium bifold doors is easier than you might think.
It is important that the opening is square, level and straight and there is a solid structure to fit the frame.
Make sure the aperture is clean and remove any old silicone.
Once your opening is prepared, you will need to take three height measurements and three width measurements.
You will then use the smallest width to calculate the size that the door will be made to (the make size). We recommend using a laser measure, to ensure accurate measurements.
The doors will need to be 15mm smaller on the width and the height than the aperture.
Please note, the overall height is measured from the bottom of the cill, not the door. It is important that you consider the finished floor level at this point. We can provide a cross section or a sample threshold and cill for you to check against.
The internal and external reveal measurements must be checked to ensure there are no obstructions with plaster, tiles or anything else that may obstruct the opening.
Select a point within the structure to agree a finished internal floor level height with the builder. Refer to the cill and threshold cross-section at this point. Check if the existing threshold level needs to be lowered to ensure the threshold sits flush or at an agreed height with the internal floor level.