Insulation


  #1  
Old 10-12-05, 06:26 AM
Roadkilll
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Insulation

What is better...blown or rolled insulation?
 
  #2  
Old 10-15-05, 06:08 PM
scotteam
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HELP Needed by next weekend

Please let me know as well that is what I will be doing next weekend. My place has about 1" of wall insulation on the outside walls and 4" in attic. There was none in basement till today.

At this point it looks like the loose stuff is too expensive. a bag is like 40.00 and a bag don't look like it will go far.
 
  #3  
Old 10-16-05, 02:14 PM
T
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Blown-in cellulose is heavier than blown-in fiberglass and it tends to settle and lose some of its insulativeness. Blown-in cellulose should not be installed over fiberglass because it will weight down the fiberglass and reduce its insulativeness. For more info on the different types of insulation, go to http://www.ornl.gov/sci/roofs+walls/.../ins_tab1.html

Which is better? This study by the Department of Energy, tends to indicate that cellulose is better because when the temperature difference between inside and outside differs 25 degrees or more, cellulose's R-value increased whereas fiberglass' R-value was significantly compromised. They called it R-Value Drift.

http://www.foam-tech.com/theory/rvaluedrift.htm

If you have room to move around in your attic, batts of fiberglass can be installed. If you have existing insulation, you will use faceless batts without a vapor retarder. If you go to the Department of Energy's website at http://www.ornl.gov/sci/roofs+walls/...on/ins_16.html you can calculate the needed R-value for your area.

For helpful info on this website, go to http://doityourself.com/insulate/index.shtml
 
 

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