hi im new to the forum.
i have been plastering for 6yrs. firstly on new builds subbing to a contractor and more recently renovation work mainly damp proofing and cellar conversions.
so that's my background outta the way. now to the problem ive had today.
On my 4th gauge i had an artex ceiling to skim. The ceiling was in good condition none of it was blown or sagging so instead of pulling it down or over boarding it i decided to skim it. i prepared it by scraping off the high points.
And then with a 1 part pva to 1 part water gave the ceiling 2 coats left it 10 mins until it went tacky then started the mix. then i gave it the 1st coat then straight after gave it the 2nd coat blah blah blah. anyway on the 2nd wet trowel an area of about 1 sqm started to sag and split so i quickly sliced a square around the split and down it came.... i checked the rest of the ceiling for fear of that coming down as well but it was tight. even the area what i cut was tight. so i gave the rest of the ceiling a dry trowel n relay put some pressure on to see if it would do it anywhere else but it didn't.
so the problem ive got is this. the 1sqm that came down had the paint on the under side of the plaster here is a photo
and another one
so the pva did the job it was the paint coating the artex that was the problem. but now there's no paint in that area its left a very chalky damp artex. cant scrape it off cos it will still be chalky, don't want to chop it back to the lats because it could risk blowing the rest of the ceiling cant pva it would be better off pva'ing a sand pit it would lift straight off. what im thinking of doing tomorrow is getting it 1 mill into the render underneath the artex
and using that as a key.... any ideas have anyone else had this problem. thanks for taking time to read this.
i have been plastering for 6yrs. firstly on new builds subbing to a contractor and more recently renovation work mainly damp proofing and cellar conversions.
so that's my background outta the way. now to the problem ive had today.
On my 4th gauge i had an artex ceiling to skim. The ceiling was in good condition none of it was blown or sagging so instead of pulling it down or over boarding it i decided to skim it. i prepared it by scraping off the high points.
And then with a 1 part pva to 1 part water gave the ceiling 2 coats left it 10 mins until it went tacky then started the mix. then i gave it the 1st coat then straight after gave it the 2nd coat blah blah blah. anyway on the 2nd wet trowel an area of about 1 sqm started to sag and split so i quickly sliced a square around the split and down it came.... i checked the rest of the ceiling for fear of that coming down as well but it was tight. even the area what i cut was tight. so i gave the rest of the ceiling a dry trowel n relay put some pressure on to see if it would do it anywhere else but it didn't.
so the problem ive got is this. the 1sqm that came down had the paint on the under side of the plaster here is a photo
and another one
so the pva did the job it was the paint coating the artex that was the problem. but now there's no paint in that area its left a very chalky damp artex. cant scrape it off cos it will still be chalky, don't want to chop it back to the lats because it could risk blowing the rest of the ceiling cant pva it would be better off pva'ing a sand pit it would lift straight off. what im thinking of doing tomorrow is getting it 1 mill into the render underneath the artex
and using that as a key.... any ideas have anyone else had this problem. thanks for taking time to read this.
