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Notwithstanding questions about the construction of the cinderblock wall and its suitability to support an attached wall or the wisdom of a cementboard/tiled wall extending beyond the cinder block wall, moisture/weathering concerns, aesthetics, etc. there are several methods for attaching boards to cinder blocks that could be useful for you. (I'll leave the ...


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The expandable portion of the sleeve should always be in the solid part of the block. If it opens partially in the block and in the open void of the block it will hold tightly but if it opens totally in the void, the anchor will side back and forth but still be secure. The walls of the block are probably 1-1/4" thick so depending on the thickness of the ...


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My guess was going to be that the mortar is more porous than the cinder blocks so there was more water infiltration coming in those areas and affecting the color regardless of whether the discoloration was done during or after painting. However, upon closer inspection I can see that certain blocks are fully affected by the discoloration so that leads me to ...


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The darker color indicates the infiltration of water. It usually occurs after the block was painted rather than prior because, as usually the case, the paint wouldn't adhere to a moist/wet surface. However, it can occur in a basement if the wall-floor edges were not cleaned properly (the surface was dry but dirty).


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Cinderblocks/concrete blocks normally have a hollow section: If they were mounted sideways, so that the core was in the middle, then they would need to be filled in with concrete and they would end up being different, even when finished & painted, in the middle than on the sides. This does seem a little odd, because normally they will be stacked so that ...


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If this cavity is no longer required to function, suggest repairing the crumbling wall, then build a wood frame fastened to the joist and wall, and cover the hole with plywood.


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Presumably, being force per unit area it's compressive strength. Pounds per square inch in our non-metric units. As such, under perfect conditions of perfectly even loading and adequate support, your 10x10cm brick would hold just over 10 metric tons. Given 10.5 metric tons, or any imperfection in how evenly the load was spread, it would crush. So, that's an ...


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Get some hydrogen peroxide, dilute to 7% with water and spray or roll it on the blocks. Within 24 hours the mold is gone any that is still left reapply and that usually takes care of mold on concrete block sometimes a 3rd round then an occasional treatment keeps the concrete bright. No chemical residue to worry about the hydrogen peroxide breaks back down ...


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