I’m sorry, but I don’t know any method to generate join between meshes 
The only thing I could suggest is to place to planes as close to each other as possible and then merge, but I’m afraid it’s not the solution you’re looking for.
I’m sorry, but I don’t know any method to generate join between meshes
The only thing I could suggest is to place to planes as close to each other as possible and then merge, but I’m afraid it’s not the solution you’re looking for.