My sister who lives in the Houston area, which is normally high humidity,
but has experienced a lot of rain the last couple months, making the mold
situation dramatically worse. (I live a couple hundred miles west of her,
and we are in our third year of a serious draught).
Anyway, my sister has black mold growing on her sidewalks, patio, and
driveway concrete. I suggested she use a garden sprayer (the kind that fits
on a hose and has a jar to hold the plant medicine) to spray the concrete
with bleach. It would possibly take several applications about a week a
part to get rid of all the mold, but it would be easy to do.
The thing I don't know is how heavy the mixture of bleach to water should
be. My guess would be about 10% bleach, but that is certainly an uneducated
I hope someone here has had experience with killing mold on concrete, and
will advise us on whether bleach is the right approach and what percent, and
if not, what the best treatment, then what is.
Thanks in advance.