This process is required when you want to make the door bigger in width or possibly cutting the door down and then having to add edges.
Video showing how to add edges to a flush door
The DirectDoors.com site is based on compatibility and will try and guide you to buy the product that is best suited for your door, eg; the correct hinges, the correct latch or lock for a particular type of handle and so on.
Whatever you want we have it!
Any questions, email firstname.lastname@example.org and ask "Chippy"