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Old 10-13-2009, 07:55 AM   #1
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Insulating Exterior Walls in an Old House


Good Morning,

I recently had a contractor come by to give an estimate on removing some luan paneling that was installed by the previous owner and replace it with sheetrock. He mentioned that since the walls will be exposed that we should put in insulation in the exterior walls. I seem to remember reading somewhere that without a vapor barrier the insulation will get waterlogged from the condensation and that it will rot out your walls. He told me that the insulation has a vapor barrier on one side and you just have to install it in the correct direction to avoid the condensation problem. Is this correct of should I be asking more questions? I would hate to have my walls rotting out a few years from now.

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Old 10-13-2009, 08:27 AM   #2
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Insulating Exterior Walls in an Old House


Insulation does typically have a moisture barrier on the side that goes next to the sheetrock. You should definitely insulate when your walls are open. You will pay for the cost in energy savings in relatively short order. You will notice a difference in comfort too. Be sure and insulate the coverplates as well.

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Old 10-13-2009, 10:11 AM   #3
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Insulating Exterior Walls in an Old House


i'm having cellulose blown into my walls on friday. I did a lot of research and talked with 3 contractors about doing my house walls.

while doing my research i found the following information on cellulose.org, may be it helps you, may be not. Thought i'd chime in though...good luck!

Do I need a Vapor Retarder?
With cellulose insulation, a vapor barrier isnít recommended except in cases of high humidity areas, such as pools and spas.
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