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Old 12-09-2013, 09:12 AM   #1
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Fiberglass atic insulation


I have an older home with fiberglass attic insulation. It's unfaced and I currently have two layers. How can I tell what R value these two layers provide? I am in milwaukee wi so I need R49. I am trying to decide if a third layer would be required.

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Old 12-09-2013, 11:13 AM   #2
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Fiberglass atic insulation


Try this insulating schedule of many available.
http://www.homeadditionplus.com/insu...Comparison.htm

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Old 03-23-2014, 10:17 AM   #3
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Fiberglass atic insulation


Okay so now that is a little warmer I probably have around R30 in my attic currently. Is it okay to add a third layer of R30 fiberglass or does the weight of the R30 start to be a concern for the two exiting layers that I have?
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Old 03-23-2014, 01:31 PM   #4
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Fiberglass atic insulation


Not going to be an issue.
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Old 03-23-2014, 01:33 PM   #5
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Fiberglass atic insulation


Really should be adding baffles to keep from blocking the air flow from the soffits to the roof vents.
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Old 03-23-2014, 03:10 PM   #6
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Fiberglass atic insulation


I have no soffits. Old house from 46 that architecture review commission for village won't let people modify the roof line to add a soffit

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