Stop using store-bought spackle on old plaster walls

I fixed up three rooms in my 1920s house last winter and kept getting cracks reappearing after two weeks. Turns out modern spackle is too rigid for old lime-based plaster that still moves with humidity. I switched to a mix of joint compound and a little bit of white glue and the repairs have held for 6 months now in my Denver place. Has anyone else had better luck with a custom mix for old walls?

2 comments

2 Comments

theabarnes1mo ago

Have you tried adding a bit of fine sand for texture match?

gavin_knight391mo ago

Start by grabbing a tiny pinch of sand from your kid's sandbox and mix it in with your spackle. Honestly, this whole sand trick works way better than people expect, I've been doing it for years on old plaster walls. It's kind of funny how the small stuff we ignore all the time, like sand at the beach or gravel on the driveway, actually solves these random home problems. You'd think it'd just make a mess, but it blends in perfectly for that slightly gritty, old school finish. Probably why builders back in the day used sand in their plaster mixes too, some things just never go out of style.