To Float or Not to Float

How thick should my walls be, should I float my floors (and if so, how), why is two leaf mass-air-mass design important, etc.

Moderators: Aaronw, sharward

Jay Hovnanian
Posts: 8
Joined: Tue Feb 24, 2004 12:16 pm
Location: Boston

To Float or Not to Float

Post by Jay Hovnanian »

Okay, it's almost time to begin construction - I have footings .... Ethan, you and I have talked about this topic. All others are welcome to chime in, please.

I'll be on a 4" concrete slab - is there really a need to float the floor in the tracking room? (There will be a double wall between the tracking and control rooms.)
knightfly
Senior Member
Posts: 6976
Joined: Sun Mar 16, 2003 11:11 am
Location: West Coast, USA

Post by knightfly »

Jay, just checked the only thread you started in the design forum, and still don't know what you're building - nor do you mention your goals as far as isolation - either inside to outside, or CR to tracking room, etc - So it's not possible to answer your question with what you've given so far. Can you be more specific about everything? That would get you a lot closer to an answer... Steve
Jay Hovnanian
Posts: 8
Joined: Tue Feb 24, 2004 12:16 pm
Location: Boston

Tracking Room Floor

Post by Jay Hovnanian »

Sorry Steve - thanks for digging deeper.

Please see the thread "Control Room Design" in the Design forum. It essentially shows my layout. There will be a double wall between the CR and Tracking (drum booth) Room. I'm not seeing the need to float a floor in the tracking room. The structure is completely underground, and I will be framing inside of 10" poured concrete walls on top of a 4" concrete slab. What do you think?

Thanks,

Jay
knightfly
Senior Member
Posts: 6976
Joined: Sun Mar 16, 2003 11:11 am
Location: West Coast, USA

Post by knightfly »

If you're going to record acoustic drums, at least one of the floors should be floated if you intend to use your monitor speakers for mic placement instead of headphones - in some cases, floating both CR and Tracking room floors is advisable. It depends on how much isolation you want/need.

You still didn't clarify what you're doing - am I to assume you're planning on floating the CR floor? And if so, will you be resting that half of the wall on the floated floor?

You need to understand that I'm not trying to be dense here, I just get such a wide variation in experience and abilities and understanding that I can't take anything for granted. You need to spell out exactly what you intend to do so we're both on the same page - it would help even more if you could post a few detail drawings for clarity... Steve
Jay Hovnanian
Posts: 8
Joined: Tue Feb 24, 2004 12:16 pm
Location: Boston

Post by Jay Hovnanian »

Thanks again, Steve (and, I certainly don't think you are dense)!

The space inside of the concrete walls is basically divided into a CR and TR. Please see the attached drawing. I have spoken with a couple of folks (with much experience) who feel - at least in my situation, that floating floors are not necessary ... that the bleed between the two main spaces will be minimal. I am inclined to agree, perhaps biased by the desire to maintain as much room height as possible(?).

I do plan to split the slab in half - an expansion joint dividing the CR and TR spaces. Each room will then be built upon it's respective slab, however, with no floating floors. There will be no sheet rock in the interior wall space - it will be lined with mineral wool and air in between.

Here's the crux of the matter. Should I really be concerned with the crushed stone and earth below the slabs vibrating so much so as to compromise my ability to "turn up the monitors" while tracking? Or, is that getting overly caught up in a factor that may very well have a minimal (if any) effect on a finished recording?

Thanks,

Jay
AndrewMc
Posts: 178
Joined: Tue Apr 22, 2003 8:55 am
Location: New Orleans, USA

Post by AndrewMc »

I think you will be fine. You could pour a floated slab (703 + fiber board + 703 + plastic sheet + 4" concrete) for the drums to sit on. This would be easier than floating a whole room.
Andrew McMaster
knightfly
Senior Member
Posts: 6976
Joined: Sun Mar 16, 2003 11:11 am
Location: West Coast, USA

Post by knightfly »

I agree with Andrew - plus, the cool thing about the floated drum riser is that you could wait to build it til after you see if you have enough isolation for tracking with monitors on... Steve
Post Reply