Simple previous fiberglass will not be nearly as good as rock wool in that feeling. I would go ahead and take Roxul guys advice and set up flush to subfloor, the joists might even be tall enough to get a next layer of batts. As soon as the assessment is https://modern-outdoor-lighting55554.blogunteer.com/31553601/the-smart-trick-of-building-regulations-that-nobody-is-discussing