How to measure and fit a front door
Although The Composite Door Shop offers a full UK front door installation service, we know that sometimes a competent DIYer might find it quicker to measure their own front door for a fitting.
Measuring a front door requires care and attention, as the wrong measurements can lead to your door fitting incorrectly, meaning that your new front door will be less secure and difficult to use.
When measuring for a new front door, the areas you need to measure are the width, height and diagonals. Be sure to include the complete door, frame and cill in these measurements.
Measure the width of the front door at 3 points, the top, middle and bottom. Take the smallest measurement of each and deduct 10mm.
To measure the height, measure at left, centre and right and again take the smallest measurement and deduct 10mm.
For the diagonals, measure from top left corner to bottom right corner and vice versa, to ensure that the opening is square (less than 5mm difference in both measurements).
When measuring for a new front door:
- Use a new, metric tape measure
- Don’t use a linen or paper dressmakers tape measure
- Ensure enough clearance around the edge for the door to open properly
We provide detailed instructions on how to correctly measure a front door, including a free downloadable front door Measuring Guide PDF.
You can also see our online measuring guide for more help.