Studio Construction about to begin.. need some clarification

I Annoy · Post by **I Annoy** » Tue Aug 02, 2005 4:09 am

Hi Everyone, I am just about to start construction on my basement studio and need some assistance with a few things. First off I just wanted to let you know that I did read all the stickies before I posted

I have been reading this forum religiously over the last few weeks to make sure I had all the info I need before I start building walls. One problem... Just when I thought I had it all figured out I come across a post that drastically changes what I thought I understood. So Here Goes.

I am building a studio in my basement which is partially under ground level. I really want to ensure that I eliminate or reduce the noise to the rest of the house as much as possible. Half of the exterior walls are solid 5" thick concrete while the top half is made up of Brick exterior- rigid fiberglass board - 1/2"plywood-then framed 2x6 with fiberglass insulation. See picture below.

My main question is that I had originally planned to build the 2 layer wall has pictured below.

I have seen some pictures of others contruction where they used the current concrete was as the first leaf. Can I do the same and just build my second leaf in front of the current wall with an air gap?

Any help would be greatly appreciated.
Vince

Maybe I should submit a few pics to the "design" forum to confirm my layout is OK as well.??

the dreamer · Post by **the dreamer** » Tue Aug 02, 2005 4:41 am

I have seen some pictures of others contruction where they used the current concrete was as the first leaf. Can I do the same and just build my second leaf in front of the current wall with an air gap?

Yes, this is exactly what you should do! Other wise you end up with a triple leaf system.

Florian

I Annoy · Post by **I Annoy** » Wed Aug 03, 2005 1:11 am

Thanks Florian, I guess I understand a little more than I gave myself credit for

Any suggestions on treating the lower portion of the concrete wall. Should I just use adhesive to attach insulation or should I build a small frame to fill in?
Thanks

the dreamer · Post by **the dreamer** » Wed Aug 03, 2005 2:03 am

I guess both would work, but if you build a frame, make sure it does not touch the inner frame of the new walls. In Europe we have something liek plastic nails with big platelike heads to hold insulation in front of walls. They would work as well.

I Annoy · Post by **I Annoy** » Wed Aug 03, 2005 2:31 am

Thanks so much for your help. I guess I can start working on it when I get home tonight.

Vince

the dreamer · Post by **the dreamer** » Wed Aug 03, 2005 2:42 am

Another thing, if you decide to glue the isolation make sure you use something that doesn't get soaked far into the wool. It's effect is gone then.
There are different solutions, have a look at the local suppliers, they know.

I Annoy · Post by **I Annoy** » Wed Aug 03, 2005 4:31 am

Sounds like a good idea. I'll stop off on my way home and see what they say.
Should I cover it with a vapour barrier like the top half or leave it uncovered. I read in some other posts that the vapour barrier relfects some of the higs and mids and when its not covered it catches a little more of the lower frequencies. If I leave it uncovered I would get a balance of the 2. Does that sound correct?

the dreamer · Post by **the dreamer** » Wed Aug 03, 2005 4:52 am

I don't know what is common building practice in your country and don't know about the climate where you are. I suppose as there is a vapour barrier on the other areas you might need it!

Don't worry bout the highs as you are building another shell inside. And DRYWALL should stay like it is named

I also somhow don't like mold.
But also ask teh building guys in your area. Rod and Steve will know this as well!

Florian

knightfly · Post by **knightfly** » Wed Aug 03, 2005 3:37 pm

Steve

I Annoy · Post by **I Annoy** » Thu Aug 04, 2005 2:27 am

Wow, thanks for those links Steve. That was interesting to say the least.

It definatley looks like I need to remove the plastic and place the new vapour barrior just before I start putting up the drywall on the inside leaf.
Thanks a lot for the save.

Dan, pointed out the concern in my design thread.

take a look
http://www.johnlsayers.com/phpBB2/viewtopic.php?t=4133