A powdery substance called efflorescence will sometimes appear on stone, concrete or tile surfaces. This shows up as irregular, whitish blotches and is especially frequent around joints and grout ...

It can be quite frustrating when that white, chalky substance known as efflorescence or "new building bloom" shows up on your freshly poured surface. Luckily, efflorescence can be treated and removed, ...

White deposits on the exterior of a home are almost certainly efflorescence. They're just salt crystals that are left behind when water evaporates from the masonry surfaces around a house. The problem ...