How to make a bi-fold door

Installed a door for some friends in their downstairs toilet, however there is not enough room to have a conventional door, and bi-fold doors prove to be rather expensive, so I was given that task of fabricating something to work.

1. Take one solid pine internal door from the reduced bin at B&Q and one sliding door tracking system.
   
   
   
2. Cut door to length
   
3. Split door in half on saw bench
   
   
   
4. Trim each half to the desired width, taking an equal amount off each half to keep it even
   
5. Install tracking system

Hey Presto a Bi-fold door for £10 rather than the £70 to buy off the shelf!

Well, maybe it was not that easy, but all in a weekends work! The problem with this is that you find modern doors are not made to the standards the once were, although the outer edges of the door we purchased were square, once we got back home, and I started to cut it up I soon found that the internal sections were not square to each other, this did cause some problems, but I think you will agree that the finished