Most concrete or cinder blocks are hollow. In other words, they're just a shell, about an inch or two thick, not a solid block of concrete. You can hold them with your hands by putting part of each hand in the hollow area, or in both hollow areas for the most common cinder blocks, which have two.
But are all concrete blocks hollow? It seems to me the blocks used in the foundation of a house are more likely to be solid, because they have to hold up a lot of weight. And the top surface of the foundation wall has to be flat if bricks are on top of it. So it makes sense that the concrete blocks would be solid instead of hollow. But are they really?
I'm confused about this issue because I've never actually seen any solid concrete blocks. Just hollow ones. But it doesn't make sense to me that hollow ones would be appropriate for foundation walls. Which way would the holes be aimed? If upward, how would they have a flat surface to build the brick walls of the house on?
2006-10-08
07:04:18
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9 answers
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Maintenance & Repairs