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We use a 4 inch grinder with a diamond blade and grind out the masonry joints surrounding the block. Use a hammer to remove the block by striking the hollow cores. Once the block is removed spread mortar on the all sides surfaces of the hole (top will only be able to be smeared). Grab your new block and spread mortar on both sides and the top. Place your trowel on the underside of the block to help guide back into the hole. Tuck point and strike your joints and you are done.

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