I am really stuck and after googling, I'm finding varying answers... I want to skim coat this wall but there are some cracks in corners and blown plaster. I want to fill the deep cracks with bonding and use corner tape and multifinish for the cracks in the corners followed by a skim coat. I will need to do the bonding a few days before the corners and skim coat. Also I want to work hard angles not wet as it's my first time.... so I plan to do the bonding then the next day do the corners with multifinish and corner tape followed by doing a skim coat on 2 opposite large walls. Would 1 coat of pva after bonding dries, and then 1 more coat the next day and wait till it's tacky before doing corners followed by the skim coat sound okay? Then do pva on the other 2 walls and 1 more pva next day, wait till it's tacky and apply multifinish over the wall with bonding? Not sure if this has made any sense. Just trying to find a way to fix the corners but also work hard angles not wet angles.
DIY plastering my house...
- Thread starter Leahjayne
- Start date
Does it sound like it would work and not cause any problems?
Strength ox PVA should be varied.
Seal bonding and walls initially with pissy coat 4 or 5 to 1, including the first sealer coat over the bonding out
Then when ready depending on the quality of PVA - strengthen up.
Decent PVA 2 water 1 glue (poss even 3 if very good high concentrate)
Slightly cheaper stuff 50-50
Very cheap stuff - not for plastering.
Seal bonding and walls initially with pissy coat 4 or 5 to 1, including the first sealer coat over the bonding out
Then when ready depending on the quality of PVA - strengthen up.
Decent PVA 2 water 1 glue (poss even 3 if very good high concentrate)
Slightly cheaper stuff 50-50
Very cheap stuff - not for plastering.
Thank you! Very helpful! I got this glue. Would you say 2nd tacky coat should be 2:1 or 1:1 with this one?
How long after bonding do you do the first coat of PVA?
Also, I have some smaller cracks I'm going to scrim and plaster over with multifinish but was just wondering should I do it the day before skimming and let dry first or just do it say half an hour/ before skimming?
Thanks again. Feeling the fear before starting this job so want to have the process super clear.
How long after bonding do you do the first coat of PVA?
Also, I have some smaller cracks I'm going to scrim and plaster over with multifinish but was just wondering should I do it the day before skimming and let dry first or just do it say half an hour/ before skimming?
Thanks again. Feeling the fear before starting this job so want to have the process super clear.
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ChrispyUK
Well-Known Member
Pissy coat or 2 of pva to prime as Bobski says, then thicken up. You’ll know when there is enough on as the wall will stop drinking it and it will sit on the top and stay wet for longer.
As a rough rule of thumb, bonding in morning and skim afternoon. Once bonding starts to darken up it’s generally getting ready for skimming. Too early with the skim and you’ll get blisters (blebs). You can just wet it up before skimming, but in your case (no offence), would give it a couple of pissy coats of pva to be sure.
I generally tend to let pva dry before plastering, but it depends on how much time is available.
Also consider just using a bit of bonding topped off with fine filler like easifil or Toupret if you’re just patching in a few small areas. Multi doesn’t blend and feather out well unless you know what you’re doing and you’ll end up trying to fill and sand the edges to blend in anyway.
And if you really want to go town and the background is a bit suspect and you’re not hacking the lot off, you could get some render mesh and embed it in the first coat of bonding to tighten everything up. 50 x 1m roll on Amazon, it’s usually pink in colour. Pre-cut it to length first and put on a wetish coat, align and hold at top and smooth it down with your trowel. Overlap the next run and keep repeating before flattening if all off. Lovely to skim over tbf, as it’s now the equivalent of a dry ski slope
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That's Bostik
It's ok - pretty good
I'd say 2-1
But totally depends on substrate suction and you and your speed.
Tacky or dry shouldn't matter
(Ideally glued on the day for me)
Don't like next day jobbies
Cockney
Well-Known Member
Not reading all that waffle.Pissy coat or 2 of pva to prime as Bobski says, then thicken up. You’ll know when there is enough on as the wall will stop drinking it and it will sit on the top and stay wet for longer.
As a rough rule of thumb, bonding in morning and skim afternoon. Once bonding starts to darken up it’s generally getting ready for skimming. Too early with the skim and you’ll get blisters (blebs). You can just wet it up before skimming, but in your case (no offence), would give it a couple of pissy coats of pva to be sure.
I generally tend to let pva dry before plastering, but it depends on how much time is available.
Also consider just using a bit of bonding topped off with fine filler like easifil or Toupret if you’re just patching in a few small areas. Multi doesn’t blend and feather out well unless you know what you’re doing and you’ll end up trying to fill and sand the edges to blend in anyway.
And if you really want to go town and the background is a bit suspect and you’re not hacking the lot off, you could get some render mesh and embed it in the first coat of bonding to tighten everything up. 50 x 1m roll on Amazon, it’s usually pink in colour. Pre-cut it to length first and put on a wetish coat, align and hold at top and smooth it down with your trowel. Overlap the next run and keep repeating before flattening if all off. Lovely to skim over tbf, as it’s now the equivalent of a dry ski slope
Thanks for all the advice! Sorry to sound like an idiot but just to double check, with smaller cracks easifill is better than multifinish? And do i need to let the easifill dry out before skimming? Then do the pissy coats of pva? I know all this is very basic but I've only just made my first set of shelves.Pissy coat or 2 of pva to prime as Bobski says, then thicken up. You’ll know when there is enough on as the wall will stop drinking it and it will sit on the top and stay wet for longer.
As a rough rule of thumb, bonding in morning and skim afternoon. Once bonding starts to darken up it’s generally getting ready for skimming. Too early with the skim and you’ll get blisters (blebs). You can just wet it up before skimming, but in your case (no offence), would give it a couple of pissy coats of pva to be sure.
I generally tend to let pva dry before plastering, but it depends on how much time is available.
Also consider just using a bit of bonding topped off with fine filler like easifil or Toupret if you’re just patching in a few small areas. Multi doesn’t blend and feather out well unless you know what you’re doing and you’ll end up trying to fill and sand the edges to blend in anyway.
And if you really want to go town and the background is a bit suspect and you’re not hacking the lot off, you could get some render mesh and embed it in the first coat of bonding to tighten everything up. 50 x 1m roll on Amazon, it’s usually pink in colour. Pre-cut it to length first and put on a wetish coat, align and hold at top and smooth it down with your trowel. Overlap the next run and keep repeating before flattening if all off. Lovely to skim over tbf, as it’s now the equivalent of a dry ski slope
Ooh and should I use easfill on he corners with the corner tape instead of multifinish because it's harder to feather out with it?
Stewie03
Well-Known Member
I think this isn’t going to go well for you the most basic tasks of preparation you are asking 101 questions which is fair enough but this isn’t like your first set of shelves you just made,I’m all for somebody doing diy and saving a few quid but your on borrowed time with plaster especially as a diy goer
ChrispyUK
Well-Known Member
I meant if you’d got a couple of cracks of holes in the middle of a wall that you weren’t planning on skimming the whole of it. Just a patch in job.