This house used to have a minor basement water problem due to bad gutters,
fixed that, but I'd like to paint the walls to cover the black mildew stains
in a couple of the corners. Concrete block walls. What would cover these
stains with an absolute minimum of surface prep?
Drylock is great for painting concrete (poured or block) but you will have
to clean the stains first. The can will tell you how to clean it and the
cleaning product is usually right near it on the shelves at the store.
The paint is about $17/gallon or $55 per 5 gallon bucket.
I am actually in the middle of such a process right now except that my
walls are only a year old and just need a good sweeping to get the
concrete dust off of them. It looks great and is a ton easier and cheaper
than finishing the basement. My basement is about 1600 sq. ft and I will
need about 12 gallons by the time I'm done.
After a coat of Killz, Zinsser Mildew-Proof PermaWhite interior paint works
great, really does resist mildew for at least a few years as far as we can
tell, and can be tinted to light colors. And you can get it in a satin, I
Clean the walls with a household bleach solution, 1 cup of bleach in a
gallon of warm water. Probably a garden sprayer would make it
easier. If you use soap, you'll need to rinse it. Allow it to
completely dry before you paint, about a week.
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