Looks like saltpetre which is leaching through the brick. You may hae waterproofed the outside but what about water leaching from the roof. Water will find a way.... Here is an interesting link... http://www.arcane-industries.co.uk/l1/p281-dampness-saltpetre-condensation.html

Sur, There are multiple options, get a real brick wall made and paint it white. Use white brick tiles to make a wall panelling. Use tiles with brick patterns. Use wall papers with brick patterns are some of the widely used options.

Hi, The exterior of my home is brick cladded (real, clay brick). The living room walls are also brick cladded (3 sides of the wall). What types of paints/finishes can be applied to accentuate the brick wall feeling? I just want to elevate the naturalness of the brick, to give a fresh look, but at the same time do not want the walls to look too red or artificial. Leaving the walls as they are is not an option, as they look unkempt and uneven in color. Appreciate detailed suggestions (including the paint brands, color codes etc). Thanks,

These are authentic bricks in the construct. You can buy brick cladding from almost any tiles shop or use brick texture, but let me give you a headsup, they wont come anywhere close to original bricks, unless you go for a high end one