Before you order and install your new patio doors, you need to determine the correct patio door size. This is made simple with our handy step-by-step patio door measuring guide. For further information about measuring patio door accessories and add-ons, please refer to our patio door measurement guide.

What do you need?

Pen
Paper
Measuring tape
Blueprint, if necessary

Please note: with the person measuring remaining inside, both the inside and outside of the patio door should be measured with the dimensions noted in millimetres. Any additional patio door fittings, such as frame extensions or top mounted roller shutters, should also be included when measuring.

1. Sketch your patio door

Please sketch your patio door on a sheet of paper, indicating the handle's location and opening direction with the tip of a triangle, as displayed in our image. This drawing will be useful again later when it comes to noting down your patio door’s dimensions.

2. Measure the patio door’s width

Please measure the full width of your wall’s opening, once at the top and once at the bottom. IIf these measurements differ, please note down the smaller of the two values. A slight installation allowance for the new frame should then be deducted. This will ensure that the new frame new frame fits snugly into the opening.

Example: patio door with a width of 1000 mm

► 1000 mm - (2 x 10 mm installation allowance) = 980 mm

3. Measure the patio door’s height

Please measure the full height of your wall’s opening, once on the left-hand side and once on the right. If these measurements differ, note down the smaller of the two values. A slight installation allowance for the new frame should then be deducted.

Example: patio door with a height of 2000 mm

► 2000 mm - (2 x 10 mm installation allowance) = 1980 mm