I've been using a handheld heat gun myself, and yeah, keeping that steady pace is definitely the hardest part. I haven't tried making an airflow guide...

Couldn't agree more on ventilation—had to redo mine after inheriting a moldy attic mess from the previous owner. Boral tiles are solid, but Eagle Roof...

I've used both spray foam and blown-in before, but honestly, don't overlook batt insulation—especially if you're comfortable DIYing. It's affordable, ...