Insulating Garage and Interior Walls

[msmity29]

We have finally reached the insulating stage on our new house construction and I have a couple of questions:

1. When insulating the exterior walls on our garage (the wall between the garage and living space are being insulated by the builder), I should have the kraft paper side face inside the garage, correct?

2. For soundproofing on interior walls, can I use unfaced insulation? If so, how do I attach it?

Thanks in advance!

[CThomp]

1) Correct. I'm assuming from other pictures you've posted that this house is already rapped in a vapor barrier.

2) For interior walls you can use pretty much any insulation you'd like. Either staple the edges to the studs or just stuff it into place. It is an interior wall after all so any sound proofing is better than no soundproofing.

[David]

1. When insulating the exterior walls on our garage (the wall between the garage and living space are being insulated by the builder), I should have the kraft paper side face inside the garage, correct?

No. The vapor barrier belongs on the warm side of the wall assembly. You live in a heating climate, which means the v/b is on the interior because you heat the house, not the garage. You should insulate the wall from the interior side and staple on the interior side.

Then, if you intend to insulate the exterior walls of the garage (just do it now if they plan to drywall your garage), then the inside of the garage will be the "warm side." However, that's just for exterior walls of the garage.

2. For soundproofing on interior walls, can I use unfaced insulation? If so, how do I attach it?

Anything you feel like it. The more alternatives in density, the better. So if you have leftover rigid foam (aka, the builder left it on the ground), now is the time to use it.

To hang the unfaced insulation for soundproofing, you can staple it, cram it, or use a plastic mesh (looks like a chicken wire) stapled onto the studs after placing the insulation.

[CThomp]

I think that is what he was saying. Why I said correct. Did I mis-read something?

[David]

CThomp - I think so. ;)

OP said:
"1. When insulating the exterior walls on our garage (the wall between the garage and living space are being insulated by the builder), I should have the kraft paper side face inside the garage, correct?"

So, no, I think what she is envisioning is incorrect.


PS - I say she because OP's name is msmity29. I assume that is Ms Mity, no?

[CThomp]

But you said that the inside of the garage is the "warm" side and should have the kraft paper facing the warm side. I think she(?) is saying the same thing you are. And the same thing I am. So I think we're all saying the same thing...in conclusion. That or i'm a total retard. Which isn't unheard of.

[David]

I knew that would confuse things and I shouldn't have said it!

What I meant is that the garage is considered the warm side for the outside walls. For a wall between a living room and a garage, the garage is the cold side.

Sorry for making this confusing.

[CThomp]

So i'm not retarded. Geeez.

[woodall83]

It gets insulated exactly like the interior of the house... minus the side(s) attached to the house which would already be insulated.

[David]

minus the side(s) attached to the house which would already be insulated.

Well, that is the wall in question. :rolleyes:

[msmity29]

Thanks for all the info! By the way, I am a "Mr.". LOL

[CThomp]

It gets insulated exactly like the interior of the house... minus the side(s) attached to the house which would already be insulated.

Which is what he (at least that's cleared up) was implying originally I believe.

I think we were all on the same page with this from the get go. It's Monday.

[David]

Thanks for all the info! By the way, I am a "Mr.". LOL

Ahh, too funny. ;) Sorry about that!

So what's the username mean then?

[David]

Which is what he (at least that's cleared up) was implying originally I believe.

I think we were all on the same page with this from the get go. It's Monday.

I think I found a hole outside. I'm gonna go crawl in it now. Tuesday will be here soon.

[msmity29]

My first name is Mike and my nick name is smity.

[CThomp]

Welcome to the forum Smity!