|“Lime bloom” or efflorescence is a naturally occurring phenomenon and does not require any treatment.
When water is added to cement it sparks a series of chemical reactions that cause the cement to harden or “set”. Lime, a natural material, is a byproduct of these chemical reactions. It is slightly soluble and may appear on the tile surface as a white film once the water has evaporated.
Efflorescence does not affect a cement roof tile’s durability, strength or original colour. While levels of efflorescence vary in accordance with the lime composition of the cement and local weather conditions, it eventually disappears by itself.