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Stucco or Plaster over Structural Clay Blocks
I have a basement that has walls made of structural clay blocks. More than a decade ago I chipped and scraped most of the paint off the walls. I even used a high pressure washer to get what I could off. Apart from sandblasting €“ which I am not going to do - getting virtually all the paint off is not going to happen.
I am going over the walls one last time and plan to cover them with either plaster or stucco. There is a little dampness to various places and some efflorescence here and there. It always comes back in time. I have read a lot and am more confused now than when I started. I've boiled my questions down to the following. (1a) Should I use an additive to make the material stick better? (1b) If so do I add it to the mix or paint it onto the bricks first? An additive is definitely going to add to the cost. (2a) Should I use stucco or plaster? (2b) If stucco, will the so-called brown coat alone be enough if I dont care about a smooth finish in the end? I plan to paint whatever I end up with. (2c) If I decide to add a finish coat should I €śscratch€ť the brown coat before it dries? (2d) Will the brown coat develop hairline cracks? (3) Should I pit the wall first by drilling a lot of little holes a short way into the blocks? (4) Should I go to the trouble and expense if reinforcing the material I use with fiberglass fibers or a mesh of any kind? |
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