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 Post subject: Slab Vs Foundations
PostPosted: Fri Nov 02, 2018 12:36 pm 
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Hi there,

I'm in the process of designing an outside music studio. It needs to have two layers of brick to create a cavity into which I can stuff sound proofing material. Looking for best approach to foundations. I'm an absolutely a beginner at this but determined to do this myself. Do I need to have traditional foundations or will a reinforced concrete slab suffice? Internal dimensions of the room will be 4m x 7m and 2440mm tall (to avoid needing planning permission!). What depth would either the slab or foundations need to be? Hoping I'm not going to have to dig down a meter like I've just seen someone on YouTube do....!

Thanks in advance!


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 Post subject: Re: Slab Vs Foundations
PostPosted: Fri Nov 02, 2018 7:29 pm 
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In this situation I'd go for foundations as opposed to a whole slab approach. I can't say for definite just what size , I'm sure someone could provide a link to calculating the size but personally I'd go for something bigger than the cals say , over engineering and all that .
One thing I will say though is to reevaluate your idea of a cavity with sound insulation inside as it's not really the best approach . The insulation should be on the inside face of the walls . This prevents the noise transferring through the masonry . Timber floor with isolated joist so as not to transfer noise and insulation between and a similar approach to the roof.


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 Post subject: Re: Slab Vs Foundations
PostPosted: Sat Nov 03, 2018 11:35 pm 
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Re insulation in music studios, I have been in a few, and the sound insulation is NOT in the walls, but ON the walls (inside not the outside) When I first saw it I wondered why they have egg trays stuck on the wall (That's what it looks like)

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 Post subject: Re: Slab Vs Foundations
PostPosted: Tue Nov 06, 2018 11:08 am 
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More research done: What I need to create is a room within a room, and reduce movement of air between the inside where the noise is, and outside where the noise shouldn't be! I considered timber, but need the density of blockwork to again minimise air movement.

Looks like I'll have to go with foundations as I doubt two layers of breeze block will sit well on a slab! Probably going to clad the outside with timber for the sake of aesthetics.

Cheers for the replies.


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