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Old 05-19-2017, 02:36 PM   #1
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Insulation behind a shower


I am finishing a basement and will have a shower along an exterior wall. My home is new and is effectively insulated along the exterior of the foundation. Other than in a few spots for fire blocking purposes, I am not planning on installing interior insulation throughout.

However, it occurred to me that I need to fire block behind the shower below the soft fit. In researching the best materials to do this in a potentially high-moisture area, I found some online chatter about needing an "air barrier" in the space behind the shower.

Does anyone know if I need this for my situation (new construction, externally insulated home)? If so, can you walk me through what I need to do? As a side, if I don't need this and anyone has any thoughts on the best material to fire block this space, I would love to hear them as well.
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Old 05-22-2017, 07:27 AM   #2
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Re: Insulation behind a shower


What is the insulation that is currently installed? It is the PSK fiberglass?

Make sure you air seal and insulate the rim area and then I would incorporate some rigid foam into equation behind the shower and get rid of an batt type insulation there.
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Old 05-22-2017, 07:34 AM   #3
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Re: Insulation behind a shower


If the exterior wall of your foundation is insulated, you don't need any more. You can, but it's not required. Use whatever you want.

Not sure what you want to fire block. Pictures?
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