Latex caulking cracking?

[Rabbithole]

Could it be that the joint can handle more movement than the paint and that's why it's cracking? Or are they just drying cracks from the paint?

 

[JohanVSF]

Could it be that the joint can handle more movement than the paint and that's why it's cracking? Or are they just drying cracks from the paint?

I think it might actually just be drying cracks. It seemed that way when I had sanded down the cracks. I don't think the house is actually moving that much. The joint probably shrank a bit more than what the paint could handle.

What I'm wondering is if it's safe to just apply another layer of ceiling paint after sanding down the cracks, or if I should apply another layer of joint on the joint, so to speak, first?

 

[Rabbithole]

If you are satisfied with the shape of the joint, I would have tried just painting an extra coat.

 

[JohanVSF]

If you are satisfied with the shape of the joint, I would have just tried painting an extra coat

I'll go with that!

 

[snowjim]

No matter what type of material meets another, it will likely move unless it's a very stable concrete/brick structure at its core. I've applied various types of grout in our house with a wooden frame, and it looks nice for the first few months, but then it cracks. Tec3 holds up better, but if it's a thin layer, it also cracks.

As mentioned, if it's not a stable concrete/brick foundation, I would install trim directly.

However, I am only a hobby carpenter and speak only from my experience of the 5-6 years we've been renovating the house we live in.

 

[boohoo]

I have not had any problems with Essve acrylic flex 25%. However, I do not use it in either inner corners or ceiling/wall joints. I embed tape and so far I haven't had any cracks at all, and this in a wooden house from -64.

 

[JohanVSF]

This is a 50s apartment in a solidly built house from '52. But as Heraclitus said: Panta Rei ("Everything flows")..

 

[snowjim]

Essve acrylic flex 25% has not given me any problems. However, I don't use it in either inner corners or ceiling/wall joints. I tape and joint compound, and so far I haven't had any cracks at all, and this in a wooden house from -64

Aha, with tape it sounds like you mean between drywall panels? There we have used regular joint compound with tape and it has held surprisingly well actually. The main movement seems to be in the inner corners and between the ceiling and wall. Also between door frame and wall, the sealant holds poorly, probably that's why generally we use moldings here.

The kitchen was one of the rooms we renovated first, and unfortunately, I was so dumb that I tried to cover all cracks between the tiles in the ceiling with branded sealant. It looked fine for 1 year, now it looks far worse than if I hadn't sealed it at all. Probably have to remove the sealant and repaint, which is quite a bit of work, so it will have to wait for a few more years.

 

[boohoo]

Also installing joint strips in the ceiling/wall angle and in the inner corners of the walls. This way, you avoid having to deal with latex/acrylic sealant.