05:23PM | 05/06/03
Member Since: 05/05/03
1 lifetime posts
My house is 50 years old. My basement has a newer poured cement floor and now were the new cement meets the old walls there is some kind of reaction going on. It is eating away and causing it to have a white powder. I think if this goes on for long it will eat right through the foundation. What is this and what can i do??


06:39PM | 05/08/03
Member Since: 01/28/03
693 lifetime posts
What you are seeing is called "effloresence".

Effloresence is caused when water travels thru porous masonry products, first dissolving, then redepositing, minerals contained on the inside of the masonry on the outside.

Effloresence will NOT "eat thru" your concrete.

Effloresence can easily be stopped by eliminating any water intrusion into your basement.

[This message has been edited by homebild (edited May 08, 2003).]


12:18PM | 12/29/07
Member Since: 12/28/07
1 lifetime posts
I built a new home 9 years ago. Everytime the floor in my garqage gets wet, the spot that is wet gets the white powdery flakey looking stuff around the perimeter of the wet spot. Im not sure if it does it in the summer, cant remember, but does in the winter. Since I park in the garage, and come home from work with snow or ice and rain, the floor gets wet and the white stuff starts. Is there something i should be doing to the floor to stop it?


10:18AM | 01/18/08
Member Since: 11/13/07
20 lifetime posts
pressure wash the floor, let it dry, & apply a silicone siloxane again at any const supply house.

in theory, there's no difference 'tween theory & practice,,, in practice, there is !
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