Floating Floors – Right and Wrong

Floating Floors – Right and Wrong.
In this video I attempt to explain how to do a floating floor so that it actually works! Because we are doing MUSIC, a lightweight floor will not perform the isolation you need and can even harm the room acoustics – the sound.
Do it once – Do it right! Get the facts here.

John H. Brandt, Acoustic Designer

Music: “What Makes People” by Jimmy D.Lane

Thank you for watching! Please SUBSCRIBE!


RecordingStudio9.com says:

Hi John, I’m building my home studio in my backyard as a detached stricture. I have 1 100mm thick concrete slab, and have already set double framing for room-in-a-room concept for soundproofing, most details from your examples and others. For the floor, since I have no one below me, and not attached to any other building, would I still need to float my floor, on top of the slab? Or just simple underlay and laminated timber flooring will be enough? I may have to record a drum set or a bass guitar with amp, as low frequencies. Would the noise still go out via the slab?

Javier Pares says:

Hello john! First of all your videos are great. I am writing to you because I am building a small recording studio and I want to know what you think about this type of floating floor construction.


I wait your answer. Thanks!

RecordingStudio9.com says:

What is a better option for doors. I’m building room-in-a-room, and have 2 doors. Is having a solid core wood door of 40mm thick be better option, or a door with foam inside a sandwiched plywood, with 40mm total thickness.
Much appreciated and thanks in advance.

Rollan Raimer says:

I rented a lower level apartment below a family of 6 kids and they had hardwood floors OMG it was so freaking loud and the kids never took their shoes off and the kitchen chairs sounded like the crashing Thunder of God

petejt says:

I plan to build a music studio in a basement. The floor will be poured re-enforced concrete. So according to your advice, I won’t need a floating floor. Is that correct?
But what about critical refraction? Wouldn’t sound waves refract along the concrete and then transmit up a connecting wall to other parts of the house?

ProTipsTV says:

Very good information.

Oli Silk says:

John, great videos thanks! I’m about to build my room on a slab, and thus no floating floor for me – I had one question if you wouldn’t mind – I’m in a generally cold climate, what is the generally accepted solution when constructing directly on the slab to allow for maximum insulation (and also not building the floor up too much as I have a restricted ceiling height!)

Channel 88 You Tube says:

hi and thank you for your video. i live in between floors in a apartment. what would be the best way to reduce noise impact on laminated flooring ? rubber, cork underlay
?? any top soultions please ?

sundamusik says:

Great info Mr Brandt(dutch name?). I’m using a spare bedroom upstairs, that has a concrete floor. Was thinking about putting in a flotating wooden floor with the u-boats, but since this isnt the right way what would you suggest? also is a big window 4 x 3.5 m gonna be a problem, or is building some sort of wall/big panel the best option in this situation? my thanks

mickavellian says:

The basic audio engineer definition
“A floating floor has the minimum contact with the existing floor it is FLOATING. Held from the top with rubber/spring hooks and at the bottom NOTHING should be touching the exterior wall. Yes when you do, you’re “floating” , you wind up with a swinging box. Now gradually put acoustic anchors to the sides and the inner room till it is steady enough to walk in and out without any swinging. The SECOND you have ANY solid and long material as a rest for the inner room , it is NOT a floating room.

Love Life says:

Clear it for me brother.

tmr says:

Many thanks, Maestro

Matthew Pardini says:

Great info!

Love Life says:

hahaha youre orite with me brother. Good vid

menteencoma says:

+JHBrandt hey, great video !! where could I study this subject more in depth ?? Any books you can recommend ??

Aabid Ali Mulla says:

Good information. Thanks.

Billy Mohler says:

Excellent video!! Confirmed what I had been thinking about my own studio floors.

DeltaRecords says:

John Brandt is the man !

Rollan Raimer says:

I laid our floating floor over indoor outdoor carpet it worked very well to help soundproof shoe noise. These companies want to sell you foam underlayment but it’s not thick enough

Rob L says:

Reminds me of Walt from breaking bad. Great video sir.

The Orange Room Studios says:

Next Video: Right and Wrong way for isolating ceilings? That is my biggest problem with DIY studio located in a basement.

Rohan Firminger says:

Hello John,

Thanks for all the piquant wisdom you’ve provided over the years, you’re certainly one of the “Acoustic Gurus” I refer to whenever thinking about room acoustics. Much appreciated!

On the topic of floors in general, we recently moved into a two story house, and the space available for my mixing studio is on the second floor, with a crawl space between the first and second floors.

Also, horror of horrors, the floor has carpet on it. The studio has the acoustic panel approaches your and other leading acoustic experts use, so I’m left wondering what I should do about the floor. I suspect that odd resonance will happen based on the structure outlined above. I do notice the bass from 80 down to 20 Hz behaves oddly, although still trying to work out exactly what is going on, I just hear that something is not quite right with reference tracks. (Sorry, I can’t be more specific at this point, I need to run some diagnostic signals to get a better idea).

The room is mainly used for mixing, and if’ I’m composing, most recordings are done via DI guitar/bass/keyboard, so room acoustics won’t matter for these since they don’t use microphones. However there will on occasion be voiceover/vocals recorded (Vocals are usually done in a professional studio for vocals so not a constant need to do this).

What would you suggest given this is the room I have to work with? Also, would placing some kind of sub-floor material on top of the carpet work to get the “natural” hardwood sound you were referring to? Can I get away with mixing with the carpet, or is it that important to have a hard floor? (‘I’m imagining you’ll say hardwood floor is the way to go, but I don’t fully understand exactly why this is, if that makes sense – I know Foley rooms use padding/carpeting, but not mixing rooms generally).

(I know there has been such crazy discussions re carpet vs hardwood floors, but honestly I’ve heard so many different points of view I just need to get an answer that gets to the heart of the best way to deal with this, hence hoping you can shed some light on this from your perspective).

By the way, the rooms quite small and no drums will be used in it. It is primarily for mixing – dimensions are just under 13 ft by just under 9 ft.

I hope I’m not overstepping asking these questions, however, It’d be great to get to the bottom of this one if possible please. 🙂

Once again, thanks so much for all you have shared over the years John!

petejt says:

Thanks so much for this John.

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