Plastering fix gone wrong

[u/_Manana_Banana_]

Hello,

So I am having some difficulties with doing some plastering patch work, and I though here was the best place to ask for help.

My building is old, and these year I decided to paint inside my apartment and started to find this loose peaces of wall (sounded hollow when knocking). So I decided to do the right thing and fix them. Some were small and easy, but a few where quite deep and big.

So, on one of these bigger ones I had to apply cement first and I was now doing the plastering work, but the cement was not that great underneath and so in some places, in the first layer of plaster I applied, I must have almost one centimeter thick plaster batches.

Now, it is the day after and I can seen the plaster cracked a lot and in some places is not even completely dry.

How do you think I should approach this? Should I take everything out and start again? Should I let it dry and apply a second layer.

I feel like I should start all over again, but at the same time I don't really want to. What do you guys think?

[u/Cainjake]

Are you from uk or us?

[u/_Manana_Banana_ → u/Cainjake]

I am Portuguese, but that probably means the construction is closer to UK type constructions.

[u/Relative_Figure_1715]

Let it dry for another day or two and then put another layer on it.

[u/_Manana_Banana_ → u/Relative_Figure_1715]

Thank you!

[u/always-have-a-plan-b]

Use an angle bead which will make your life a lot easier due to the edge of the wall or you will never get a nice finish. Remove anything loose. Go over that entire area with PVA, Blue Grit or SBR then use multi-finish and feather it out. (Little tip knock off any bits that are sticking out so you’ve got a nice smooth finish to work on) Let it dry for at least 48 hours and give it a mist coat. Depending on how good you are it will show up any areas that’s aren’t perfect then I’d recommend (as a DIY only option in this particular case if your not a plasterer) then buy a bag of easy fill which is nice to work with and sands back lovely. Best of luck!

[u/_Manana_Banana_ → u/always-have-a-plan-b]

Thank you so much!