Top Bar Hive Super Box

I made a super for my Kenya TBH. The reason for this is to minimise interferance in the lower hive body where the brood is. This hive will be opened only once a year when harvesting the honey in the super. My plan is to let the bees be and let go of hive manipulation. Our human factor stresses the bee colony alot.
Here is the photo, as you can see i m still to find out how to build a roof.