blown-in insulation

Reply

  #1  
Old 07-10-02, 07:26 PM
Marlow
Visiting Guest
Posts: n/a
Angry blown-in insulation

If I have blown-in insulation in my attic, can I add the Owen-Cornings Rolled insulation on top of that, or should I remove the old blown-in insulation first. Or... am I better off (both in terms of quality and financially) adding more blown-in insulation.

Thanks
 
Sponsored Links
  #2  
Old 07-13-02, 06:14 AM
Member
Join Date: Nov 2001
Location: USA
Posts: 1,873
Though contractors commonly mix different types of insulation, I would recommend blowing in the same type of insulation over the insulation you already have. The reason for it is different types of insulation have different rates of absorption and retention of moisture. It is true that insulation resists heat flow and as a result would resist condensation between the 2 different insulation materials. I look at it as, it increases the possibility of condensation may occur, even though the potential of it occurring is small.
 
  #3  
Old 07-29-02, 07:55 PM
rbisys
Visiting Guest
Posts: n/a
Greetings,

If you have 6 inches of fiber glass in the attic adding more will probably not save you enough energy to pay for the material. The incease in efficiency of R19 to R38 is about 7.5%(if you are lucky). Since the first 6 in. saves you about 80% of what fiber glass can perform at you can see the why the poor results.

You can save up to 30% + on a/c by installing a radiant barrier insulation over the top of your existing insulation.

If you want more detailed info contact me at [email protected].

Thank you for considering my opinion.
 
Reply

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread
Display Modes