I'm remolding my dry basement using mainly steel studs. However it is a walkout so the south wall is 2x6 wood and insulated. I want to provide insulation and also sound deaden the basement from the rest of the house. Wife runs a daycare... I was thinking of insulating all the walls and floor joist. Plus use foil-faced foam insulation behind all my drywall. Do you see this as a problem?
Problem no...but you don't need foil insulation on interior walls. Owens corning makes a somewhat denser product for noise transmission...but if you really want isolation, you'll have to do more than insulate.
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Rippy's 100% right. It isn't a problem, but isn't going to do much for you. Sound attenuation batts would be more appropriate, although minimally effective in the grand scheme of things. Resilient channel attached to the studs under the sheetrock would be the best thing to do, in combination with the batts.
Anything you do short of the whole resilient channel, sound attenuation blanket, sound board process will be an effort in futility. You will muffle the sound somewhat, but not kill it with regular insulation and/or foam board. The sound will travel through the fasteners connecting the drywall to your studs and/or joists. Sound proofing is possible, but costly.
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