Level or smooth old textured cinder block wall

Old 10-05-11, 08:00 AM
scoob8000's Avatar
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Level or smooth old textured cinder block wall

My foundation walls are all older textured block similar to the photo. I want to install a light next to the walkout basement door, but I need a smooth our flat surface to mount the surface mount electrical box.

what would be the best product to use to level out a small 5x5" or so section of block? The best idea I can come up with would be some type of liquid nails, out nurturer behind the box.

Fwiw, the wall is also painted.

Old 10-05-11, 04:05 PM
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Carefully hitting it with a masonry wheel on a small angle grinder would take down the bumps in short order. I've done several very similar a few years ago, and each rectangle took about 15 minutes, plus some hand chipping with a cold chisel and 3 lb. maul to make the rounded-off corners square. Make sure to wear a face mask, as the dust can be hard on the lungs.

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