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Old 01-14-2014, 09:48 AM   #1
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Twin house party wall


With the cold weather we had here, I'm suddenly busy with drywall repairs. This particular job involves a master bath over an unheated garage. Plumber was there and did what he had to do, and I followed removing wet drywall and insulation. 2 pipes burst at the head end of the tub and ran thru the floor soaking the garage ceiling and a 5 foot section of wall. Heres a couple pics.

#1 Location of burst pipes in relation to party wall. This is a 2x4 wall in front of the party wall.

#2 View of same area but in the garage directly below tub.

#3 View of 1" gap between inside wall and party wall.

#4 Same gap from garage.

Now, what I suspect happened was very cold air was moving from the garage area, thru this gap, and freezing the pipes.

My question is, does anybody see a problem with spray foaming this gap closed? I almost think it should've been fire stopped, but I've never built a twin dwelling and I don't know if this area was left open for a reason or not.

TIA, Blake
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Twin house party wall-img_0496.jpg   Twin house party wall-img_0499.jpg   Twin house party wall-img_0498.jpg   Twin house party wall-img_0500.jpg  

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Old 01-14-2014, 11:56 AM   #2
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Twin house party wall


That garage was supposed to be completely fire blocked from any living space.
http://greatstuff.dow.com/products/fireblock/

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Old 01-15-2014, 07:29 AM   #3
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Twin house party wall


I think you're probably right Joe. Thanks.
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