Has anyone else been warned that hard Portland cement can shatter century-old brick? I found https://automaticmasonry.com/heritage-restoration-masonry/ emphasizing breathable lime mortar matched for color and texture, plus heritage brick replacement with salvaged units when possible. Stone repair for limestone, sandstone, and granite is listed with architectural work on cornices and window hoods. Practical distinction if incompatible mortar has already caused freeze-thaw damage.
Has anyone else been warned that hard Portland cement can shatter century-old brick? I found https://automaticmasonry.com/heritage-restoration-masonry/ emphasizing breathable lime mortar matched for color and texture, plus heritage brick replacement with salvaged units when possible. Stone repair for limestone, sandstone, and granite is listed with architectural work on cornices and window hoods. Practical distinction if incompatible mortar has already caused freeze-thaw damage.