Are the walls straight?
Use a spirit level to check that the walls are plumb and the floor is level. If measurements differ or surfaces are uneven, measure again. If unsure, have a professional check the opening before ordering.
Measure the width and height in three places. Enter the smallest measurement for each, in millimetres. We calculate the clearance.
See where to measureMeasure between the finished walls at the top, middle and bottom.
Note the smallest width.Measure from the finished floor to the top of the opening on the left, in the middle and on the right.
Note the smallest height.Enter the smallest width and smallest height of your opening. Do not subtract anything: Steel Direct calculates the manufacturing dimensions and installation clearance.
| Measured | Enter | |
|---|---|---|
| Width | 902 / 900 / 901 | 900 |
| Height | 2402 / 2401 / 2400 | 2400 |
Use a spirit level to check that the walls are plumb and the floor is level. If measurements differ or surfaces are uneven, measure again. If unsure, have a professional check the opening before ordering.
Allow for skirting boards, switches, furniture and radiators. Check the opening direction and available space.
Check doorways, corners and any stairs from your front door. Prepare a dry, clear space to receive the packaged door.
Want to discuss your own doorway? Send us your question and a photo.
Ask us a questionNo. Use the smallest width and height from your three measurements. An average may exceed the narrowest or lowest point. Also check that the walls are plumb: taking the smallest measurement does not correct an uneven opening.
No. Enter the finished opening measurements. We calculate the clearance. Subtracting it yourself would mean allowing for it twice.
You can take preliminary measurements for planning. Take final measurements once the floor and walls are finished. New flooring or plaster changes the opening your door needs to fit.
Measure the full opening, not each leaf separately. Enter one width and one height. Then choose the double-door configuration and leaf split.
Do not round your measurements to fit the limits. Check you are using millimetres: 90 cm is 900 mm. If the measurements are correct, send us the width, height and a photo so we can review the options.
Keep them handy when designing your door. Check your measurements and choices again before ordering.