My experience with masonite for inner covers is that it tends to bow
downward if you use top feeders. I don't like using masonite
personnally.
BE>I plan to mke my own hives.
 
BE>1. Does anyone have any thoughts on the use of Masonite for the Inner cover
BE>and the hive top (tin clad).
 
BE>2. Any problems with the use of treated timber for hive boxes?
 
BE>John Lewis
BE>Fiji