"condo owner" wrote in message
...
The tiles were made by Multy Home (in Canada).

I've sent them several e-mails and I've used the "Contact Us"
form on their website -- http://www.multyhome.com/contact-us
-- but they don't respond.

Looks suspiciously like its a known problem
if its been weeks since you asked them and
they are hoping you will give up and go away.

The tiles looked the same before pressure-washing.