Case 2

Introduction

Localised Formation Of Efflorescence

Type of Building: Commercial

On this part of the external facade, localised formation of whitish streaks of deposit were spotted. The deposit was present on the part of the wall above which no efflorescence was spotted which is being divided by a distinguished horizontal streak of whitish deposit.

The efflorescence deposit also reduced the aesthetic value of the building.

Efflorescence is a harmless defect that is considered to be only a temporary disfigurement on new buildings that is removed by weathering agents within a year or so of construction. Even where it does return in cycles following wetter weather, unless there is a supply of salts from another source, the deposits will gradually reduce in intensity until it disappears altogether.

In new work, the extent is often related to the amount of rainwater that enters the structure during the construction process. Post construction efflorescence will always occur where percolating water affects the materials. Salts will be taken into solution and deposited on the edge of the damp-affected area.