Insulating my inside walls, vabor barrier or not?


  #1  
Old 04-10-19, 02:21 PM
G
Member
Thread Starter
Join Date: Sep 2004
Location: New York
Posts: 580
Likes: 0
Received 0 Likes on 0 Posts
Insulating my inside walls, vabor barrier or not?

Putting insulation in my new addition walls to deaden the sound, I believe R-13 should do it. Would I use faced insulation or non faced?
 
  #2  
Old 04-10-19, 02:54 PM
I
Forum Topic Moderator
Join Date: Feb 2005
Location: Near Lansing, Michigan
Posts: 10,941
Likes: 0
Received 45 Likes on 43 Posts
For exterior walls use a faced insulation with the vapor barrier toward the side that's warm in winter. For interior walls use bare non-faced insulation. An insulation like rock wool is better for sound control than fiberglass.
 
  #3  
Old 04-10-19, 04:40 PM
XSleeper's Avatar
Group Moderator
Join Date: Dec 2004
Location: USA
Posts: 29,405
Received 1,568 Likes on 1,406 Posts
It doesn't matter which you use since the kraft paper won't hurt anything on interior walls. It's not "needed" but if you like to staple it up the kraft facing helps with installation. Either way, you want a tight fit. If unfaced insulation falls out you've cut it too loose.
 
  #4  
Old 04-11-19, 06:32 AM
G
Member
Thread Starter
Join Date: Sep 2004
Location: New York
Posts: 580
Likes: 0
Received 0 Likes on 0 Posts
Thanks for all the help guys...
 
  #5  
Old 04-11-19, 09:29 AM
Marq1's Avatar
Member
Join Date: Sep 2016
Location: USA MI
Posts: 9,710
Received 994 Likes on 903 Posts
My experience is that R13 fiberglass does nothing for noise.

Have used Soft touch for internal walls, does great, never tried rock wool!
 
  #6  
Old 04-14-19, 09:58 AM
G
Member
Thread Starter
Join Date: Sep 2004
Location: New York
Posts: 580
Likes: 0
Received 0 Likes on 0 Posts
I mostly wanted to insulate my inside walls for a little extra heating protection between rooms and air infiltration, it kinda takes care of any little drafts you may get in your inside walls, I live in a cold and windy area. Another question that I wanted to ask was I put 4' faced batts in my ceiling, at the seams where they are butted together, do I have to use vapor barrier tape or can I tape the seams with tyvek or duct tape?
 
  #7  
Old 04-14-19, 10:42 AM
Marq1's Avatar
Member
Join Date: Sep 2016
Location: USA MI
Posts: 9,710
Received 994 Likes on 903 Posts
wanted to insulate my inside walls for a little extra heating protection between rooms
Insulating interior walls of a conditioned space does nothing beneficial!

do I have to use vapor barrier tape or can I tape the seams with tyvek or duct tape?
You don't need to, the batts should be pressed close enough that they touch, I doubt any tape would survive long in a hot attic environment!
 
 

Thread Tools
Search this Thread
 
Ask a Question
Question Title:
Description:
Your question will be posted in: