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I have gas!
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Discussion Starter · #1 ·
I'm pulling out a basement window blocking it up and moving a door basement door over. The foundation are blocks above grade and field stone below.
Between the window and the door there's about a six foot opening in the foundation wall. I put a line between the old in the opening to make sure that my new block courses are true to the old. I'm now on the top coarse just below a 4x8 sill.
If I push the block up as far as it will go against the sill I'll end up with about a 3/4 mortar bed that I need to tuck. Is that too thick? The new blocks are slightly smaller than the old foundation blocks (7 5/8 vs slightly more than 7 3/4).
Thanks
 

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I have gas!
Joined
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2,447 Posts
Discussion Starter · #5 ·
I found the old blocks fairly inconsistent. Some of them have a face that is 7 13/16 and a back side of slightly less than 7 5/8, while others are 7 5/8 on both sides. It makes for dropping the blocks in place and leveling them a bit difficult. The thickness of mortar was probably more like 5/8". I noticed that the original had some pretty wide mortar beds in some places as well.
I grouted 4 of the 5 courses with the top course the only ones left hollow because I have to squeeze them in under the sill. What I'm filling in is only 3 blocks wide so I'm not terribly concerned. I just don't want to do it again.
 
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