drhex wrote:
What happened? It isn‘t that old iirc?
It isn't new anymore....2007 I think. Depending who you ask plaster is good for 10-15 years or 15-25 but 'er probably in the window and honestly it wasn't a very good plaster job from the get go. By the 3 year mark there were a bunch of little under 3" surface pops mostly all on the north wall were the surface plaster separated from the rest of the plaster. the pool company blamed me for water chemistry but everything I read says its cause be over troweling and moving the top surface once the base has set.
The chemistry has been a bugger over the winter, the ph goes stupid high and I need to add 4-8 gallons of acid come spring....that's not normal. It means something very caustic in the plaster or maybe concrete mix is dissolving into the water....if seems to have final worked itself out as I only needed 1 gallon this year and last year was 2 iirc. The ph going way high over the winter means dissolved calcium drops out and bonds to the plaster surface making really sharp stalagmites/tites. I sanded it a little (nothing like what I just did) about 3-4 years ago and fixed the little pops on the north wall and a couple larger ones but the repair plaster was brown not white as labeled so part of this project was to grind all that out since Lana HATED seeing it. There seemed to be very odd etching going on too, low ph will cause etching but not like this, I had like a leather surface, probably poorly mixed plaster.
The pops on the floor? Well it was about a year concrete to plaster as I worked to finish the work on the pool area so no doubt the floor was dirty and need a wash and etch before plaster....yeah, they didn't do that as normally they plaster 30 days or so after concrete and can get away without the extra steps so there are areas that didn't bond very well.
So it was never a good plaster job but hopefully this work will stretch the need need to replaster and the $7k-10k bill that comes with it out another 3-5 years.