My basement walls in my 1960 home were painted over masonry. Things looked fine when we moved in 3 years ago, but for the past two summers we tend to get a lot of effervescence and paint peeling. This seems to stop throughout winter and spring despite snow and spring rains.
So I'm wondering if our problem is more due to inside moisture in summer than seepage from outside which we would be able to fix by a dehumidifier. Can this result in effervescence?
I would also like to fix up the walls but it will be near impossible and certainly a major pain in the back to scrape the walls to bare masonry. I was hoping to just paint over but have heard conflicting reports how to do this. Being that the majority of the wall surface, approx 90 percent has paint, I plan to scrape the peeled areas and they cover with primer and they latex paint. However I heard that you don't need to prime masonry first?
Any help is appreciated.