Most of the advice I see on here is to the the WAS initiate legal stuff for the most part....kind of the put it in their hands approach.
My perspective is that you can never go wrong with patience. I know you believe you have been extremely patient. You may not the answer to this, but think about how your wife views your patience.
She is the one who has asked you at times "What has changed?".
The only other thing that I'll offer is to consider always being cooperative with your wife. Sort of a "drop the rope" in the tug of war if you will.
That thought comes to me from things like your roof. I would encourage you to have those discussions with your wife. I would feel free to talk about something that SHE initiates. If you ask her how she thinks and feels about stuff when she initiates a conversation, you never know what it might lead to.
Again, you may be a lot like me and say to yourself "I've done that". My C's wisdom to me was every time I say to myself "I've done that", to consider it through the lens of how my wife might think of that statement.
