I am getting frustrated trying to find remedies for painting over "chalk based paint" used in the early 1970's. Some called it builders paint. I have only found one response in google which was an old blog here 9 yrs ago referring to someone who had problems in his bathroom with new paint falling off with old paint and then peeling. I have had this problem in the past and is now haunting me again. 20 years ago we bought a home and decided to paint bedroom. Bought great Benjamin Moore Paint, prpped and proceeded to roll on the first wall only to have it literally strip off the old paint to the sheet rock as I got halfway done! I immediately stopped to catch the falling partially scrolled up mess! I couldn't believe my eyes!! I called my Aboff's store rep and told him what was happening. He said I had "chalk base builders paint" on the wall that was never covered for 10+ years. I would have to try and scrape off all of the latex paint off as well as I could. Then, use oil base primer on all walls, let it cure for 3 weeks to ensure it adhered, then proceed with any painting. What a mess! Some of the old & new paint adhered in small spots. Sanding & scraping was difficult and the thought of skim coating the whole wall was undaunting. After priming with oil base primer, I decided to sponge paint to cover the numerous small flaws.
It worked until about 7 years later we had small & large pieces of dried paint cracking, and peeling off the wall down to the sheetrock! We're talking pieces 5-12"s. I guess the oil base only lasts a few years. Consulting with many paint dealers the only fix was to sheet rock over the mess with thin sheets. My other rooms were saved because of wallpaper was used originally.
Now we want to refresh the whole house with paint to put it on the market. My husband hired a painter. He started with ceilings. I reminded my husband and warned the painter of my experience years ago and they needed to get professional advice regarding " chlak based paint" from the 70's. They ignored me and you know what happened. He painted one bedroom ceiling: looked at it and said its OK!! Whats the problem? He wasn't even 10 minutes into the next ceiling when my son started yelling that the wet paint was falling down in large pieces on his bed, curtains furniture etc. The painter and my husband were frantically covering evrything and trying to catch the falling paint strips. Then another yell from the 2nd. room the painter had started. Yep! All the wet area was beginning to peel in areas and dropping on the rug. Now I have 2 ceilings a mess!!
I cannot find anything online. It just keeps going to the new fad chalk paint, not "chalk based paint" I have 3 more bedrooms to paint.