How to Reduce Airborne Noise through a Timber Floor with Rockwool

In this video I show you how I have massively reduced the airborn sound travelling between the timber floor in my house - using Rockwool Sound Insulation for Partition Walls and Floors

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A couple of years ago I tried with only limited success to soundproof between the joists in my son's room - using Knauf Acoustic Roll and a soundproofing mat.

So this time I decided to go with a much denser product - Rockwool. It's made from stone with a "non-directional fibre orientation and a higher density" which makes it the perfect product to put between floor joists as it traps soundwaves and dampens vibration.

TODAY'S TOOL KIT
- Rockwool, which I bought from here https://goo.gl/Tqbejt
- tape measure
- marker pen
- scissors, knife or saw to cut the Rockwool, or
- Bahco Insulation saw https://geni.us/wqWi8 (Amazon)
- Protective gloves https://geni.us/mn5ZE (Amazon)
- Face mask https://geni.us/3Hit6HA (Amazon)
- Chipboard flooring from my local builder's merchant, but here's an example http://bit.ly/2YHJZma
- Soundproofing mat (optional) https://goo.gl/e3if0k

As I had ripped up the original tongue and groove pine floor (pretty nasty, low quality 1970s!) I decided to replace this with tonge and groove chipboard flooring, which comes in sheets of 18mm x 600mm x 400mm - as it's quicker to relay and will I think achieve a better acoustic result than the old timber floor.

I'm really pleased with the result. You can still hear a faint noise when the tumble drier is on, but the washing machine spin cycle doesn't penetrate through the floor. As I said in the video, depending on your budget, you can further reduce airborne noise by laying a couple of layers of soundproofing mat before the underlay and carpet goes down.

So what do you do if you want to reduce airborne noise even further? ResponsibleParty pointed out in the Comments feed below that by screwing the chipboard down to the joists, sound and vibration can travel freely between the two.. He continued, "To really reduce sound transfer, you need to somehow decouple the floor from the joists. One way is some sort of rubber spacer--there are many different types available. Another would be some sort of arrangement were the floor is somehow spaced from the joists."

There's lots of info on the Internet about floor decoupling, and it's clearly the belt and braces approach if you want to do everything you can to eliminate airborne noise. But you do just need to remember that decoupling the floor will raise it a fair amount, so there are practical considerations to take into account if you decide to go down this path...

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Видео How to Reduce Airborne Noise through a Timber Floor with Rockwool канала Charlie DIYte