I had my kitchen plaster boarded and replastered and a new kitchen fitted and then hired a decorator to paint it all white. For a few months I've had what I thought was a patch of penetrating damp on the kitchen wall (that might still be the case, back wall could do with repointing that's for sure but £££) that's gotten steadily bigger. Today, after reading another post on here suggesting it might have been that there was no mist coat I sanded off the flaking paint around the patch and basically what I've got underneath is bone dry but totally bare plaster. In retrospect, I thought he got the job done pretty fast but I was at work for most of it. Anyway, I suppose my question is - I'm guessing it's too late to get all of the paint off the kitchen walls, most of the solutions I've found involve scraping off all the paint and starting over but I'm assuming that's if it was just done not over a year later. What can I do to fix the patch? Could I just mist coat it and then repaint? Is the rest of it all going to go at some point? Already got a smaller bit forming on another wall and from knocking on it I think it's on the bits of the wall where the boards aren't flush to the brick work because it was all a bit wonky and that's why the plasterer went with the boards in the first place so maybe those are cold patches? Lots of theories about how various people have done bodge jobs but that isn't going to help me fix it...
Are you a tradesperson and able to answer this question?
Hi , from what I can read from your description. If that back wall get a lot of rain ? Some sides of a house doesn't all ways get as much rain as others but if this is the case the I suggest getting the area repointed as there is obviously moisture getting through to the back of the plasterboard and pulling through the plasterboard adhesive and then messing up your paint there could be issue we here it’s actually coming from a leaking gutter down the wall ? Possible coming down the cavity or could it be possible if rising damp however I would have to be there and look to see more I’m just give you experiences I’ve come across
So
1)Leaking roof or gutting
2)Re- point
3)cut out plasterboard 1 meter high all around and paint the brickwork with bitumen and then re board and plaster
Hope this could be any help
Stockport Renovations
Yes,the fault could be caused by the dry lining adhesive! drying out via the front of the plasterboard, this is now becoming common with high speed finishing.
The actual damp can be monitored via a damp meter with prongs.keeping a record of the areas on both sides of the walling
I suggest you buy a damp metre around £10 and see if it is dry, if it is then a mist coat may not have been applied. The correct procedure is to remove the paint back to plaster. If this isn’t an option the sand all the surfaces with an orbital sander the loose should come off, then apply Zinsser Peel stop followed by two coats of emulsion, if it bubbles after the Zinsser scrape these off and skim fill. Of course if your damp metre registers damp then fix the cause,
Cheers Ian
Answered19 June 2022
0
Anonymous user
there are 2 big problems in your description mate. 1 Fresh plasterBOARD you dont mist coat it. Mist coat is a water based paint diluated with water. You may think of PVA That is another matter but both will fail if you have dump problems and wet walls. If you dont use mist coat on new PLASTER. YOU WOULD KNOWN he didn do a myst coat. You just cant paint a freshly made plaster unless you brush it. On a roller .. you will die doing it.. all the paint from layer 1 will come off on the roller on coat 2.
