MLV is hefty and floppy and I’ll be sincere is an actual chore to install on ceilings. It is at minimal a two-human being occupation. Just one Keeping, one particular stapling. It’s a sheet or roll product built mostly from PVC or EVA vinyl to provide it limpness and adaptability. https://finnyflhg.tinyblogging.com/little-known-facts-about-mass-loaded-vinyl-product-for-soundproofing-82744835