On the subject of access, Doing the job from below is preferable. ‘I recommend insulating suspended floors from beneath Should you have accessibility by means of a cellar or basement,’ states David Sheppard, founder/dwelling enhancement contractor at HVAC Judge. Crawlspace: Test among floor joists if vented, and Verify perimeter partitions https://attic-nsulation16048.mybuzzblog.com/13485451/the-definitive-guide-to-cieling-insulation