DIYbanter - View Single Post

wrote:

Hi all, recently I got an underground leaking pipe fixed in the
kitchen, removed the lino and been drying out the cement since, it was
very wet.
I have noticed a number of small patches of white mould on the cement.
Should the whole floor be treated before I get it tiled.

It has been a week drying out and probably has another week to go, but
will this disappear when fully dried?

Its almost certainly not mold,but efflorescence - salts carried out of
cement by water moving through.

If you are tiling, brush it off and tile away.

BUT i'd wait a few weeks to get the floor really dry beforehand.

Thanks for any help.