Sounds good...when it comes to deadening a roof with something like MDF do you deaden first then put the MDF on? Or you don't even need to deaden if youre putting wood on there?For instance on a door, no more than 5 sq ft should be needed but some people have used 15-20+ sq ft on one door which is not needed (I used less than 20 sq ft to do all 4 of my doors.) I would start with 25-50% coverage and go from there. After applying it if you feel you need more then add more. Covering 100% and/ or doubling up will make the roll disappear fast.