I have a few chases to fill along with a few holes where back boxes have been removed so I am going to try a one coat plaster. The chases will require appprox. 16mm of thickness the other holes a little more but nothing exceeding the 25mm max. Thickness according to the British Gypsom White Book. I am planning to build up layers @8mm thickness.

Any Gotchas to be aware of such as drying times and finishing?

Richard

On 02/11/2021 12:59, Tricky Dicky wrote:
> I have a few chases to fill along with a few holes where back boxes have been removed so I am going to try a one coat plaster. The chases will require appprox. 16mm of thickness the other holes a little more but nothing exceeding the 25mm max. Thickness according to the British Gypsom White Book. I am planning to build up layers @8mm thickness.
>
> Any Gotchas to be aware of such as drying times and finishing?
>
> Richard
>
I would use bonding plaster (preferably, out of date) to get almost to
the top in one hit and then add a very thin skim layer. Don't forget to
use dilute PVA before each layer.

On Tuesday, November 2, 2021 at 2:14:48 PM UTC, noth...@aolbin.com wrote:
> On 02/11/2021 12:59, Tricky Dicky wrote:
> > I have a few chases to fill along with a few holes where back boxes have been removed so I am going to try a one coat plaster. The chases will require appprox. 16mm of thickness the other holes a little more but nothing exceeding the 25mm max. Thickness according to the British Gypsom White Book.. I am planning to build up layers @8mm thickness.
> >
> > Any Gotchas to be aware of such as drying times and finishing?
> >
> > Richard
> >
> I would use bonding plaster (preferably, out of date) to get almost to
> the top in one hit and then add a very thin skim layer. Don't forget to
> use dilute PVA before each layer.

I am really looking for a one bag solution what I have to do does not justify getting bonding and finish as I would normally do.

Richard

On 02/11/2021 14:50, Tricky Dicky wrote:
> On Tuesday, November 2, 2021 at 2:14:48 PM UTC, noth...@aolbin.com wrote:
>> On 02/11/2021 12:59, Tricky Dicky wrote:
>>> I have a few chases to fill along with a few holes where back boxes have been removed so I am going to try a one coat plaster. The chases will require appprox. 16mm of thickness the other holes a little more but nothing exceeding the 25mm max. Thickness according to the British Gypsom White Book. I am planning to build up layers @8mm thickness.
>>>
>>> Any Gotchas to be aware of such as drying times and finishing?
>>>
>>> Richard
>>>
>> I would use bonding plaster (preferably, out of date) to get almost to
>> the top in one hit and then add a very thin skim layer. Don't forget to
>> use dilute PVA before each layer.
>
> I am really looking for a one bag solution what I have to do does not justify getting bonding and finish as I would normally do.
>
> Richard
>
Even easier, I would use the ready mixed from Screwfix or Wickes. Less
effort that way to do more thinner layers.

On Tue, 2 Nov 2021 05:59:56 -0700 (PDT), Tricky Dicky
<tricky.dicky@sky.com> wrote:

>I have a few chases to fill along with a few holes where back boxes have been removed so I am going to try a one coat plaster. The chases will require appprox. 16mm of thickness the other holes a little more but nothing exceeding the 25mm max. Thickness according to the British Gypsom White Book. I am planning to build up layers @8mm thickness.
>
>Any Gotchas to be aware of such as drying times and finishing?
>
>Richard

Doesn't sound very ambitious. You could do more than just 8mm with a
decent one coat. You ought to be able to knock the job off in two hits
easy.
--

"There are, besides, eternal truths, such as Freedom, Justice, etc., that are
common to all states of society. But Communism abolishes eternal truths, it
abolishes all religion,and all morality, instead of constituting them on a new
basis; it therefore acts in contradiction to all historical experience."

- The Communist Manifesto, Marx & Engels.

On 02/11/2021 18:45, Cursitor Doom wrote:
> On Tue, 2 Nov 2021 05:59:56 -0700 (PDT), Tricky Dicky
> <tricky.dicky@sky.com> wrote:
>
>> I have a few chases to fill along with a few holes where back boxes have been removed so I am going to try a one coat plaster. The chases will require appprox. 16mm of thickness the other holes a little more but nothing exceeding the 25mm max. Thickness according to the British Gypsom White Book. I am planning to build up layers @8mm thickness.
>>
>> Any Gotchas to be aware of such as drying times and finishing?
>>
>> Richard
>
> Doesn't sound very ambitious.

:-)

> You could do more than just 8mm with a
> decent one coat. You ought to be able to knock the job off in two hits
> easy.

But wet the chase first.

--

Adam

On 02/11/2021 12:59, Tricky Dicky wrote:
> I have a few chases to fill along with a few holes where back boxes have been removed so I am going to try a one coat plaster. The chases will require appprox. 16mm of thickness the other holes a little more but nothing exceeding the 25mm max. Thickness according to the British Gypsom White Book. I am planning to build up layers @8mm thickness.
>
> Any Gotchas to be aware of such as drying times and finishing?
>
> Richard
>

If you have any scraps of plasterboard fill the majority of the hole
with this before using a thinner layer of filler.

Otherwise paint the inside of the hole with a PVA/water mix and let it
dry. Repeat with PVA/water mix and let it go tacky and fill the hole to
a couple of mm from the surface. The PVA/water mix will prevent the
water being immediately sucked out from the filler and should prevent it
cracking during curing/drying. Let this initial fill dry as you may find
that it shrinks back a bit when curing/drying. Paint again with
PVA/water before finally filling.

--
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