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Flooring question


Redoverfarm's Avatar
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Join Date: Sep 2008
Posts: 19
WV

10-15-10, 07:16 PM   #1  
Flooring question

I am renovating a early 60's house for my parents to move into. Problem is that in the 60's a sunken room was in style but with age it becomes a fall hazzard. I plan to build a false floor on top of the existing floor which is a 7" drop from the remaining house. With that given distance would there be a need to insulate the floor for sound proofing. I will be using 2X8 joist and 3/4 OSB. The finished floor will be 3/4" T&G. The area is 15'X23'

 
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chandler's Avatar
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Join Date: Dec 2005
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10-15-10, 08:03 PM   #2  
I would think if it is insulated well, now, no further insulation would be necessary. If you have a 7" drop at present, the 2x8 is somewhere in the neighborhood of 7 1/2" itself, then you add 1 1/2" of overlay on top of that you will have a 9" high floor, so you will be trip factoring in a 2" rim. Consider 2x6 framing with the two layers for your 7" fill.

 
Redoverfarm's Avatar
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Join Date: Sep 2008
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WV

10-15-10, 08:44 PM   #3  
I had already taken this into consideration by trimming down the 7-1/4" joist to compensate. With the added 3/4 subfloor the 3/4" T&G will lay on the adjoining subfloor correctly.

 
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