Second coat of multi finish weak and poorly adhered to 1st coat

MakeItSmooth

Well-Known Member
So you used pva several months before plastering then gave it another neat coat 1 week before it was actually plastered

Yeah, something like that. Bad move?

Put it this way:

Did you ever see anyone recommending to wait a week after putting on your PVA, before starting your plastering..?

Youtube is full of bad advice, but I've never seen anyone recommend letting the PVA dry first, for a whole week.
 

RJW91

New Member
Put it this way:

Did you ever see anyone recommending to wait a week after putting on your PVA, before starting your plastering..?

Youtube is full of bad advice, but I've never seen anyone recommend letting the PVA dry first, for a whole week.
In all fairness, no.

My view was that, as it’s there to kill the suction and re-emulsify when the plastering begun it wouldn’t matter if it had been left for a week, bit like the pre grit products.

I got all the PVA/blue grit on one weekend, on with the plastering the next. In some places it took a few days for the PVA to fully dry as well and I didn’t want to skim onto it until it had dried.

Is there a chance that the walls could have become contaminated or something between putting on the PVA and plastering?
 

RJW91

New Member
I'm not the one asking for advice though am i daft c**t
What’s your point? I asked you for advice, you’ve clearly got no intention of giving me any and now you’re getting all arsey at me? Is this how you always spend your free time? If this is where your 35 years of experience has lead you I doubt it’s worth hearing anyway.
 

MakeItSmooth

Well-Known Member
In all fairness, no.

My view was that, as it’s there to kill the suction and re-emulsify when the plastering begun it wouldn’t matter if it had been left for a week, bit like the pre grit products.

I got all the PVA/blue grit on one weekend, on with the plastering the next. In some places it took a few days for the PVA to fully dry as well and I didn’t want to skim onto it until it had dried.

Is there a chance that the walls could have become contaminated or something between putting on the PVA and plastering?

When a minority of spreads talk about PVA re-emulsifying (which is an assumption which may or may not be correct, and which may also depend, to some extent, on how much suction the underlying substrate has), they're generally referring to the PVA having been dry for 20-60 mins, not for a whole week.

The majority of spreads plaster onto tacky PVA.
 

RJW91

New Member
When a minority of spreads talk about PVA re-emulsifying (which is an assumption which may or may not be correct), they're generally referring to the PVA having been dry for 20-60 mins, not for a whole week.

The majority of spreads plaster onto tacky PVA.
Do you think that’s the cause of my problem then?
 

carl-the-plasterer

Well-Known Member
What’s your point? I asked you for advice, you’ve clearly got no intention of giving me any and now you’re getting all arsey at me? Is this how you always spend your free time? If this is where your 35 years of experience has lead you I doubt it’s worth hearing anyway.
fk me all you had to do was say please pal one fkin word....youtubes this way >>>>>>>>>>>
 

MakeItSmooth

Well-Known Member
I think you must know that you didn't really go about it in exactly the same way you've seen others doing it.

Aside from trowel technique, to a large extent, plastering is all about correct preparation and correct timings.
 

newmannewy

New Member
Sounds like you let the 1st coat dry too much before applying the 2nd, hence it didnt adhere to it properly. If the 1st coat stuck, theres no reason why the 2nd wouldnt stick, unless the 1st dried out too much. In any case, fill the patch with gyroc 60 and paint the f**k*r.
 

BryanJ

Well-Known Member
Those plasterers giving 1 thick coat instead of 2 coat work were doing it right all along..
It stops it shelling between coats
I have wasted all that time doing two coat work.
 

BryanJ

Well-Known Member
Most Youtube videos on plastering are sh*t, but I use them myself when doing some car maintenance.
It goes from remove the battery to removing wheel arch cover just to get access to change a light bulb
So I can forgive some who is short of cash, trying to do their own home repairs.
 
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