If you’re looking to buy a new door, you’ll need to measure your existing door frame to see what size you need. Measuring the frame, even if you’re confident of the door size, will ensure you buy the right product, as your previous door may have been trimmed to fit.
To be able to quickly and accurately measure your doorway, remembering to measure the door frame.
Measure the width of the doorway, taking measurements in three places - the top, middle and at the bottom. Three of the most common and standard sizes are 686mm, 762mm and 838mm.
There may be a slight variation in the width between the top and bottom of the frame. If this is the case then use the largest measurement, the door can always be trimmed to fit.
Measure the height of the doorway, again taking measurements in three places - on the left, on the right and in the centre. The most common height in the UK is 1981mm.
Again, there might be a slight variation in the measurements, so use the largest size. Also take into account any flooring that you haven't laid yet.
Measure the depth of the door frame where the door will sit when it’s closed. The standard thickness for doors is 35mm, but it may be 40mm in some instances.
If you are also having new door frames fitted, make sure to measure those as they may differ from your existing frames.
Double check your measurements as you’ll only get one chance to trim your door, if required. This will mean you can order the door closest to your size requirements, plus check how much you can plane off your chosen door if you need to.
