Sliding doors as standard fit the height of 2260mm, there’s a little give and take in the runners, around 5 – 10mm overall to cover uneven surfaces but not enough for larger gaps. Spacepro kindly made a solution for us who don’t want to fork out for the more expensive ( but lovely doors IDS) made to measure doors, we’ll write about them later.
Spacer blocks will work with heights from 2272 to 2399mm, you’ll need to purchase a couple of packs of these spacepro spacer blocks.
If your sliding doors are going into a gap 2399 to 2729mm high, the you’ll need the opening height reducers, which you can attach the sliding door tracks to, and then add to the front a simple piece of plasterboard or MDF and paint to match your colour scheme ( hopefully )
If you want to read the full sliding door installation guide then we put it here for you : sliding door installation guide
Good luck with the doors, idoorstore