Acoustic/Soundproofing Resilient Tape - Stud Work/Joist Isolation Strips 4mm Thick 30m (30mm)

I pulled up the floorboards and placed Rockwool RW3 underneath as part of a soundproofing project. I am placing the 30mm strip along the length of every floorboard so that it's in between each one so to stop wood-to-wood contact - I am then going along each board with a Stanley knife to trim all of the excess strip that's sticking up.I am also using their 3" (70mm) strip along each joist for the same reason, and I therefore have no wood-to-wood contact anywhere in the room, which will both dampen/deaden the transfer of sound - and stop any creaking (make sure that you use the correct nails or part-threaded flooring screws that will hold down the boards).This is an extremely sticky product, and I was very surprised but happy with that. A definite plus.FYI - It's worth double-checking your calculations before ordering because I initially didn't order enough. I needed 25 boards x 4,000mm = 100,000mm (each roll is 30,000mm. 30 meters). I ordered four in total, which will leave me some spare. One roll wasn't clearly enough!Delivery was fast. I recommend this product 6 stars...