Blown cellulose Vs. Rolled fiberglass
#1
01-26-08, 03:30 AM
Blown cellulose Vs. Rolled fiberglass
How do they stack up? I mean, which is better? I have loose above the bathroom now, but I hate working w/ it so I am considering getting rid of it during the remodel. Or I'd have to shift it around in the attic so it wouldn't all fall down w/ the ceiling. 
Ugg! How about replacing it w/ nice roller fiberglass before the new ceiling goes up?
Ugg! How about replacing it w/ nice roller fiberglass before the new ceiling goes up?
#2
01-26-08, 04:55 AM
Yeah, it is a PITA to work with. You could take the blown in above your remodel area and spread it around in the other areas and install Kraft faced insulation above with the kraft facing down and using the spanner wires to hold in in place until you install your ceiling materials. That will save a trip to the attic to lay in the insulation.
#3
01-26-08, 06:42 AM
Id say they are both good as to insulation in the home . BUT With the fiberglass insulation it will melt in a fire . Or like just take a torch to it some time. It will just melt away and let a roof fire get into the home. Now take cellulose insulation Try and burn it. Or put a torch to it it will just get black might glow but go out right away. Had some pictures years ago. When we sold it. Full roof burned off homes rest of the home did not burn. Was a mess but fire didnt get through the cellulose on the ceiling there. 
#4
01-28-08, 03:56 AM
Thats a real interesting observation. Never thought about that I guess. I don't think it will factor in my decision much thou- I removed much of whats over the bathroom w/ a snow shovel. Its a small area and its full of bits of junk and crap... scraps of wood and whatall. So its going in the trash. I'll get rolled insulatin for it. What R-value should go in the ceiling? What about the walls?
#5
01-28-08, 01:12 PM
From a functional standpoint, blown cellulose is far better than fiberglass, IMO.
Fiberglass insulation doesn't hold it's R-value with temps (the R value decreases as the temps go down), fiberglass will air-wash (air will blow through it, ruining its' insulative ability, and typical FG batt installation leaves many gaps and openings.
Blown cellulose holds its R-value with temps, won't allow air to blow through it, settles and fills voids to better air-seal the home, and is a recycled product.
This web site will provide recommended insulation levels based on your home and heating and air conditioning equipment:
http://www.ornl.gov/~roofs/Zip/ZipHome.html
Fiberglass insulation doesn't hold it's R-value with temps (the R value decreases as the temps go down), fiberglass will air-wash (air will blow through it, ruining its' insulative ability, and typical FG batt installation leaves many gaps and openings.
Blown cellulose holds its R-value with temps, won't allow air to blow through it, settles and fills voids to better air-seal the home, and is a recycled product.
This web site will provide recommended insulation levels based on your home and heating and air conditioning equipment:
http://www.ornl.gov/~roofs/Zip/ZipHome.html
