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Should all holes be filled with concrete?
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My contractor only filled the blocks with concrete that have rebar inside, the others are left empty. Is this okay or should all the block holes be filled?

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I'm also a highly opinionated contractor and I love this wall of text, lol.

I'm a carpenter and I've built rebar cages and formwork for quite a few retaining walls, and just worked with CMU on my first project last year.

CMU is so much easier than casting it all at once, I just put a #4 in every cell and had a horizontal #4 every 3 rows and even that felt light compared the walls I'm used to forming up.

It's concrete, you only have once shot to put the rebar in... I mostly do high end backyard renovations, so I get that a cheap owner might not want to pay for all the extra labor and materials...

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2 months ago