My neighbors aren't angry yet, buttheywillbe How would you Soundproof your basement?

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kscott

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hi! i just read the posting of similar name and i'm in more or less the same situation: soundproofing a part of my unfinished basement. i've been a good boy and gotten the info and measurements requested by mr fitzpatrick. could y'all help me?

ok, so the situation is a little different in that my neighbors haven't so much "complained" yet, but with the noise i want to make, they probably will soon. they can definitely hear it. i don't know decibals so well, but i'm planning on ear-splitting rock music: drums, bass guitar through a large combo amp with one 15" speaker and a guitar through a combo with a 12, plus maybe some horns and/or synth. not crazy loud but loud enough: i've tried with just bass and drums and i think they can hear it pretty loud and clear. when i'm in the basement i can hear them pretty good, and their two levels up on the second floor! maybe it's the pipes. or the whole house. there are also neighbors adjacent on both sides: an older lady who also can definitely hear it and whose house touches mine on the far side across from the planned jamspace, and on the side against which i plan to have the jamspace itself, an 93-year old mostly deaf man, my landlord, who shares the first floor of this duplex with us. said he couldn't hear a thing.

as for budget, mine's pretty much tiny. i'd like to do it cheap as possible. max a grand. preferably way under. is that totally unrealistic? or rather, what could i do for a grand? i plan on doing the work myself with a friend of mine who's a good builder. i have scrap wood for the walls.

the space is going to be small, not so hot for recording probably, but i'm also hoping for advice on how to brighten up the sound. i've made a floorplan but it won't fit as an attachment and i can't figure out how to paste it into this text box. i can email it to someone if they want.

my basement is large but i only have access to part of it because of an old out-of-use furnace and a couple water heaters, then the rest is shared by my upstairs neighbors for storage. i plan to build two walls (8 and 18 feet) and use part of two concrete walls, which are my landlord's wall and outside.

all of the walls in the basement are conrete, about 1 1/2 ft wide. maybe. i can only tell the size by the outside wall. concrete floor, joists in the ceiling that look to go right through into my landlord's basement and on the other side probably stop: i can't quite tell because there's a wood plank flush up against the wall fitted into the joists, which are 10" deep and 19" apart. the distance from the floor to the bottom of the joists is 7'.

there are water pipes of various sizes running both along the ceiling at various distances from the joists btw 2 and 5 inches AND up and down into the ceiling. there are electrical wires as well, and a pullchain light on the ceiling.

there's a baseboard heater for the winter and i have no plan for ventilation in the summer. the basement stays cool and obviously i'll have a door, so i'll be able to air it out. how do you ventilate a soundproof room?

there's a window outside of the planned space, above ground, and it's a quiet residential neighborhood.

anyway, i'm sure i'm missing something, but if you got this far, thanks at least for reading. any help would be greatly appreciated, and if you need more info, shout.
ktron
 
I won't venture to guess about building prices where you are. A thousand can add up darn quickly in building materials.

The concrete walls are most likely the least of your worries. Thus you have four areas of concern:

1. The new stud walls.

2. The ceiling above

3. The window

4. The door in the wall.

Taking these in order.

Your best ban for buck I am guessing will be a single stud wall with resilient channel on one side and two layers of gypsum board on each side and fluffy fiberglass insulation between the walls. (hint here: Put up the gypsum board on the side where the resillient channel is first. RC can be undone if you screw through it and into the stud. If you do the RC side first before filling the studs with insulation you can inspect to be sure tha none of the wallboard screws entered the stud) Caulk well all cracks.

2. The ceiling: fill the joists with fluffy insulation, screw hat channel to the joists and then two layers of gypsum board. Caulk all joints. Relocate the pull-chain fixture to the new ceiling.

3. Either wall up the window as with other walls or convert it to two panes of heavy glass with one slightly slateed from the other, like other studio windows.

4. Heavy solid core door with good airtight seals.

Finally, turn your volume down. I know that you aren't goint to like that one, but what I have recommended here is economical isolation, not complete. To get the best isolation you would want to go floating floor and a completely separated ceiling structure and since you only have seven feet to work with there simply is not space for that. Besides it is better for your hearing in the long run too.
 
cheers

thanks for the advice. i want to read up on the specifics of soundproofing construction tech. can anyone recommend good reading material?
 
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