I'm almost certain that I'm going to seal my attic using closed cell foam and make it a conditioned space. I intend to have a professional spray closed cell foam to the underside of the roof deck. I will not be finishing it in any other way.
I want to do this because properly sealing the living space ceiling is a nightmare with so many and light penetrations, plus the cieling heights change throughout. There are currently laid Batts which are insufficient. Additionally there have been repeat pest invasions so I'm hoping address multiple problems here.
The roof is tile, vented with intermittent soffit vents and a few off ridge vents.
Once the attic is brought into the conditioned house envelope should I install systems to actively circulate its air with the rest of the living space below?