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mcarterphoto t1_j6i7gwg wrote

Reply to comment by themostempiracal in Hollow core door question by trash_recycle

It's like insulating you home. You can go nuts with fiberglass and house wrap, but one little crack letting cold air in will chill a room out very quickly. Inflitration vs. insulation. Similar with sound, though sound travels "through" things (well, transfers through things). There are lots of construction tricks, like for a quiet room use 2x6 headers and floor plates and frame with 2x4's staggered, so the drywall of both sides isn't physically connected except for the top and bottom. Double up the drywall for more density with the seams staggered. Then fill the space with rockwool or 703 (if you can afford it). But to really have a soundproof wall, far as I know you'll use blocks and fill the voids with concrete.

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marigolds6 t1_j6j5fck wrote

>You can go nuts with fiberglass and house wrap, but one little crack letting cold air in will chill a room out very quickly.

Or, conversely, why throwing down a simple draft blocker or tacking up a single piece of rigid insulation in the right spot, or even just putting plastic film over a key window, can make a huge difference in a room.

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mcarterphoto t1_j6jipkg wrote

That's why there's one outlet in my house that gets blue tape over it when it's freezing out, it almost whistles cold air in! (Yeah, I need to fix that properly...)

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