Awning windows can be incorporated into the non-sliding panel of the sliding or stack door.
For new builds, sliding and stack door sills can sit in line with the floor and deck if the bottom PVC-U frames rebated fully. For renovation projects, this may not be possible due to restrictions of existing structure and/or waterproofing.
Sliding and stack doors are latched with a locking handle that operates a four point locking mechanism at the side.