paint cracked

moneyistooshorttomention

Some freshly-painted wall has got bits of paint flaking off, revealing the paint that was previously there. Also corners in that room have started to look damp, when they looked dry just after the paint had been put on.

Any thoughts on:

a. What happened?

b. How to deal with?

moneyistooshorttomention

Further thoughts that may be relevant on this are that the walls had been replastered with Easi-Fill prior to the paint being applied (as the wall surface was painted, but not good enough condition walls imo).

moneyistooshorttomention

Anyone got any thoughts?

goodmorningsunshine

moneyistooshorttomention wrote: »

Further thoughts that may be relevant on this are that the walls had been replastered with Easi-Fill prior to the paint being applied (as the wall surface was painted, but not good enough condition walls imo).

Easi-fill thats the culprit, but the best "stuff" I've worked with.
I have just nearly finished a 3 bed house (renovation, of couse, not building it, although I might have been quicker to build it) and I used easi-fill a lot.

You really need to seal the easy-fil/new plaster after it dries with watered down pva.

Well that's what I done anyway and had no problems.

goodmorningsunshine

moneyistooshorttomention wrote: »

Some freshly-painted wall has got bits of paint flaking off, revealing the paint that was previously there. Also corners in that room have started to look damp, when they looked dry just after the paint had been put on.

Any thoughts on:

a. What happened?

When you painted the wall the new plaster would be soaking in the paint which is why it would look dry - new plaster just soaks in.

b. How to deal with?

Lightly sand down, removing the flaking paint,
prepare pva glue watered down, there will be instructions on the container, and seal the new plaster with this,
I would recommend covering all of the walls that have new plaster on it with the pva glue, once dry you will be able to paint the walls again, which may take more than one coat.

Just a thought when you say paint, do you mean emulsion or gloss?
When I say paint I mean emulsion
When my mum says paint she means gloss. ???

moneyistooshorttomention

goodmorningsunshine wrote: »

Lightly sand down, removing the flaking paint,
prepare pva glue watered down, there will be instructions on the container, and seal the new plaster with this,
I would recommend covering all of the walls that have new plaster on it with the pva glue, once dry you will be able to paint the walls again, which may take more than one coat.

Just a thought when you say paint, do you mean emulsion or gloss?
When I say paint I mean emulsion
When my mum says paint she means gloss. ???

Thank you.

I've read varying comments about pva glue. Some people swear by it on top of new plaster, others swear by watered-down coat of paint instead. I really couldn't make up my mind and think that there may be a personal preference for people.

My builder had used ordinary Thistle plaster on the other walls, but then decided to use Easi-Fill in this room. In both cases, he used watered-down paint on top of the new plaster and then painted. It's been okay with the Thistle plaster, but in this case...:(.

"Paint" is both...but when I refer to paint on walls I mean matt or vinyl silk. In this case, it's matt (a decent quality brand). The watered-down paint was an own brand trade one (Leyland I think?).

EDIT;

More specifically, when you say its the Easi-Fill that's at fault, do you mean that Easi-Fill is a bad idea of itself and shouldn't have been used OR that it was okay to use Easi-Fill but there was something wrong with the way it was applied (eg not had enough time to dry properly)?

moneyistooshorttomention

A related query I have is that, having had both types of plaster used so far, I seem to recall that the reason given for using Easi-Fill instead this time was the walls being in better condition than in the other rooms (where Thistle plaster was used) and that Thistle plaster wouldn't adhere properly to walls that had, in this case, been painted.

Is that the case? What is the position on that? I am wondering rather, as a very small area of wall that has had Thistle plaster applied was painted and not in too bad condition and the plaster seems to have adhered okay.

What are the different circumstances in which Thistle plaster would be used on a wall on the one hand OR Easi-Fill on the other hand?

goodmorningsunshine

moneyistooshorttomention wrote: »

Thank you.

I've read varying comments about pva glue. Some people swear by it on top of new plaster, others swear by watered-down coat of paint instead. I really couldn't make up my mind and think that there may be a personal preference for people.

I used watered down pva on all the new plaster in the house AND used watered down paint for the first coat of paint, then needed another two coats of normal paint after that. (we sure went through a lot of paint)

My builder had used ordinary Thistle plaster on the other walls, but then decided to use Easi-Fill in this room. In both cases, he used watered-down paint on top of the new plaster and then painted. It's been okay with the Thistle plaster, but in this case...:(.

"Paint" is both...but when I refer to paint on walls I mean matt or vinyl silk. In this case, it's matt (a decent quality brand). The watered-down paint was an own brand trade one (Leyland I think?).

Yeah, thats what I took it to be.

EDIT;

More specifically, when you say its the Easi-Fill that's at fault, do you mean that Easi-Fill is a bad idea of itself and shouldn't have been used OR that it was okay to use Easi-Fill but there was something wrong with the way it was applied (eg not had enough time to dry properly)?

Easi-Fill is not a bad idea in itself, although personally we just used it to fill in gaps, smooth out rough edges and fill some cracks etc, we did not use it for a full wall.

Much easier to use and work with, drys in a couple of hours, and can be sanded down, although it is not recommended to paint it until at least 24-48 hours drying time.

How long did your builder leave it to dry before painting it?

Can I just add I am not a plasterer to trade so there may be variations of opinion of this.

goodmorningsunshine

moneyistooshorttomention wrote: »

A related query I have is that, having had both types of plaster used so far, I seem to recall that the reason given for using Easi-Fill instead this time was the walls being in better condition than in the other rooms (where Thistle plaster was used) and that Thistle plaster wouldn't adhere properly to walls that had, in this case, been painted.

Yeah, as I stated we would just use easy-fill for filling in, lumps, bumps and cracks, not a full wall, although someone else would need to advise you on that.

Is that the case? What is the position on that? I am wondering rather, as a very small area of wall that has had Thistle plaster applied was painted and not in too bad condition and the plaster seems to have adhered okay.

Hmmm, sounds a bit odd to me, if I wanted a full room or wall plastered then it would be Thistle plaster.

What are the different circumstances in which Thistle plaster would be used on a wall on the one hand OR Easi-Fill on the other hand?

Thistle plaster in my opinion would be full walls and ceiling
(we bought this for the hall and stairs to cover over that horrid stuff called artex).

Easi-Fill we used to cover the cracks in the ceiling (very small)
where the joins of the plasterboard were, the picture rails we took down, and some holes that were made by nails/picture hooks in the wall.

The previous owners must have had kids as well as there looked as if there had been a dart board on two walls at one time - full of little dart holes - easi fill was the answer to all these problems, and levelling off where someone had taken out a fireplace.

Hope this helps a little.

Mind_the_Gap

Under no circumstances should you use PVA on plastered walls before painting them. it is a recipe for disaster. I don't know whayt people persist in dishing out this unhelpful advice.

If paint is peeling off, it could be due to:

(i) an unsound substrate, in which case sand down to bare plaster to remove all loose/flaking paint and bits, apply two coats of Zinsser Gardz, then paint as usual.

(ii) incorrectly treated plaster (e.g. PVA'd!!!)- large areas of new plaster need mist-coating with watered down (30%) non-vinyl contract matt emulsion (70%)

(iii) penetrating damp from outside/through a chimney breast. You can mask this for a while with products like Dampseal but the the damp will come back in the end. You have to tackle to cause of the damp at source.

(iv) condensation forming on the affected area - is it a cold spot on an outside wall, or an area behind an item of furniture with poor circulation of air?

Pipkin

We have an issue with cracked, peeling paint. All the paint in our bathroom ceiling cracked and curled up, and some of it fell off. we reported it to the HA who sent someone out to scrape of the paint, replaster the ceiling. When dry he then gave it two coats of a special anti mould paint..5 or 6 months down the line the paint is tarting to crack in the same way again..could it be because he hasn't treated the plaster properly? it is a very small and poorly designed bathroom, but we do ventilate it to the best of our ability (leave the fan on for extended periods, have the window open as much as possible)..our neighbours who have exactly the same set up as us do not have this problem.