My back porch floor has a odd problem. It looks like a chemical
reaction. In spots the concrete looks like it is dissolving and
turning to a fine powder. I took pictures of it just a few weeks after
a thorough cleaning with soap and water.
The porch was painted before I bought the house 2 years ago. The paint
is peeling pretty badly. Before it was painted it was covered with
Also there used to be a hot tub out there. I was wondering if
chemicals from the spa might have caused this.
I made a web page with the pictures:
I would certainly appreciate any advise