Seal up brick on partition wall

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  #1  
Old 09-06-19, 04:38 PM
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Seal up brick on partition wall

This is a 110 year old wall. From what I can gather they only put mortar on the horizontal layers but not on the vertical parts between each cinder block.
The next door neighbor has a kitchen in the basement and we're getting smells coming through in the winter.
What's the best way to seal this up? I was thinking just caulk in between but maybe I should be doing mortar to repoint them and then a vapor barrier?

My image quota is exceeded so I need to post this link:
Partition wall https://imgur.com/gallery/Lmrpwx4
 
  #2  
Old 09-06-19, 06:18 PM
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So this is a common wall between the two of you? I'm not the expert but I think mortar and vapor barrier is what sounds right. I would not go the caulk route. Caulk will eventually dry up and crack. So will mortar but it's easier to fix.
 
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Old 09-06-19, 08:14 PM
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The thing is it's not real repointing where you just do the outer 1cm of the mortar... There is no mortar at all for the 8" width of the cinder block. Anyway to squeeze loads of mortar in between?
 
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Old 09-07-19, 03:31 AM
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I'd push as much mortar as I could into the joint and then trowel it over the front. I wonder if a grout bag would help ??
 
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Old 09-07-19, 04:42 AM
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Experts, what do you think about using Great Stuff? Good idea or bad?
 
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Old 09-10-19, 09:06 AM
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Any thoughts? Easier to fill the gap completely than mortar
 
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Old 09-10-19, 09:14 AM
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OK, since nobody responded to my suggestion, I'll offer my opinion. Use the Great Stuff (low expansion type) to fill as deep as you can go. Them use mortar to fill in the surface. You might need to dig out about and inch of the Great Stuff after it cures. This will; give a finished look and the mortar will hold the joint together at least at the front.

PS...Be aware that the Great Stuff might expand through to your neighbors side. You may want to consult with him first.
 
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Old 09-10-19, 01:16 PM
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With low expansion it shouldn't cause any issues on the lathe and plaster. Even with 3x expansion wouldn't it just come back out on my side?
 
 

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