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Old 12-02-2009, 03:06 PM   #1
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DIY blowing in fiberglass


Hi, i need about 450 sq. ft. blown in between my studs from inside. I saw at HD and Lowes you can rent a machine for blowing in celluose. What about doing the same with fiberglass? What is involved? I am thinking about just buying a hole saw and going at it.

Seems HD and Lowe's don't sell fiberglass to DIY blow, they only sell the cellulose.


Last edited by mayhem69; 12-02-2009 at 04:15 PM.
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Old 12-02-2009, 05:51 PM   #2
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DIY blowing in fiberglass


http://books.google.com/books?ei=Vu8...Books&as_brr=3

You are better off with cellulose: http://www.cellulose.org/userdocs/Te...ectiveness.pdf

Be safe, Gary

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Old 12-03-2009, 05:56 AM   #3
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DIY blowing in fiberglass


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Originally Posted by GBR in WA View Post
I don't think so Gary, i'm going with Certainteed SP fiberglass. Heard too many negatives about cellulose, plus it isn't proven like fiberglass.
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Old 12-03-2009, 12:54 PM   #4
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DIY blowing in fiberglass


I thought that a month ago but the more I research it, the less I believe it. http://michaelbluejay.com/electricity/insulation.html

Convective heat loss in attics with loose fiberglass:
http://www.homeenergy.org/archive/he...92/920510.html

Foam board on the studs is the way to break the thermal bridge and get your money’s worth: http://www.coloradoenergy.org/procor...f/r-values.htm

Whatever you do for insulation, be sure to use some vapor barrier primer paint to stop any air infiltration so not to have mold: http://www.fpl.fs.fed.us/documnts/pdf2000/tenwo00a.pdf Notice the air permeability of fiberglass batts = 168 and cellulose = 75, ˝ as much, or it stops air movement twice as well. Granted, loose glass would be better, though I would research it, if I was spending the money.

Be sure to air seal the wall plates, top and bottom as glass fill has next to no air movement qualities unlike cellulose. Any pipe or wire penetrations, knot holes, gaps between the plate and siding or plywood/OSB, between the drywall or plaster boards, etc., anywhere an air inlet or outlet that would reduce the R-value of the insulation. Similar to batts: http://oikos.com/library/insulating_...lls/index.html Your glass fill needs loft, cellulose is packed………. Whichever way you insulate the walls, I hope it serves you well.
Be safe, Gary
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