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Lime Bloom & Efflorescence

Lime Bloom

BS 5262 Code of practice for the design, preparation and application of external rendering Part 1 clauses 34.1 and 47 confirm that lime bloom is a phenomenon that sometimes affects cementitious products.

Most substrate types contain water soluble salts and with the water used in construction these salts will pass into solution and subsequently reappear at, or near the surface as the building dries out.