Burst pipe caused water damage to ceiling, been drying out for last 4
days and the ceiling appears to be intact apart from water mark staining.
I have ordered some stain block which I will use before repainting.
Should i just go with that or should I give the ceiling a clean first
possibly with a mild bleach solution.

On Wednesday, 5 February 2020 11:18:37 UTC, ss wrote:
Burst pipe caused water damage to ceiling, been drying out for last 4
days and the ceiling appears to be intact apart from water mark staining.
I have ordered some stain block which I will use before repainting.
Should i just go with that or should I give the ceiling a clean first
possibly with a mild bleach solution.

Doesn't much matter, unless it's really caked with dirt. Bleach would add salts, not a plus really. Regular alkyd undercoat is enough to block stains in the majority of cases, use satan blocker for when it doesn't.


NT

I'd clean it but be warned, the stain will eventually come back anyway, they
seem to always do that.
I'm sure some chemist might know why this is.
Brian

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"ss" wrote in message
...
Burst pipe caused water damage to ceiling, been drying out for last 4 days
and the ceiling appears to be intact apart from water mark staining.
I have ordered some stain block which I will use before repainting.
Should i just go with that or should I give the ceiling a clean first
possibly with a mild bleach solution.

Brian Gaff (Sofa 2) wrote

I'd clean it but be warned, the stain will eventually come back anyway,
they seem to always do that.

I'm sure some chemist might know why this is.

It migrates thru the paint itself.

"ss" wrote in message
...
Burst pipe caused water damage to ceiling, been drying out for last 4
days and the ceiling appears to be intact apart from water mark staining.
I have ordered some stain block which I will use before repainting.
Should i just go with that or should I give the ceiling a clean first
possibly with a mild bleach solution.

"Rod Speed" Wrote in message:
Brian Gaff (Sofa 2) wrote

I'd clean it but be warned, the stain will eventually come back anyway,
they seem to always do that.

I'm sure some chemist might know why this is.

It migrates thru the paint itself.

No **** Sherlock!

--
Jimk


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"Jimk" wrote in message
o.uk...
"Rod Speed" Wrote in message:
Brian Gaff (Sofa 2) wrote

I'd clean it but be warned, the stain will eventually come back anyway,
they seem to always do that.

I'm sure some chemist might know why this is.

It migrates thru the paint itself.

No **** Sherlock!

He clearly didn't realise that, ****wit.

On Thu, 6 Feb 2020 08:29:53 +1100, cantankerous trolling geezer Rodent
Speed, the auto-contradicting senile sociopath, blabbered, again:

FLUSH Arsetralian asshole's latest troll****

08:28 already??? And STILL not bedtime for you, you miserable lonely
sleepless senile pest? ROTFLOL

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On Thu, 6 Feb 2020 04:58:43 +1100, cantankerous trolling geezer Rodent
Speed, the auto-contradicting senile sociopath, blabbered, again:

FLUSH the sleepless senile trolling swine's latest troll****

04:58 already? And you STILL can't go to sleep? Admit it, it's because this
here is the ONLY place in the world where you can talk to people without
them being in a position to get away from you as quickly as possible, you
obnoxious sociopathic senile idiot from Oz!

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On 05/02/2020 11:18, ss wrote:
Burst pipe caused water damage to ceiling, been drying out for last 4
days and the ceiling appears to be intact apart from water mark staining.
I have ordered some stain block which I will use before repainting.
Should i just go with that or should I give the ceiling a clean first
possibly with a mild bleach solution.

At this time of year you need to leave plaster much longer to fully dry
out before you try to seal it or you will be storing up trouble.
Overpainting with a dense white emulsion will usually cover it.

--
Regards,
Martin Brown

On 05/02/2020 17:57, Martin Brown wrote:
At this time of year you need to leave plaster much longer to fully dry
out before you try to seal it or you will be storing up trouble.
Overpainting with a dense white emulsion will usually cover it.

It will be about 2 weeks after the flood before I attempt to sort the
ceiling, have had a dehumidifier running for the last 5 days and will
keep it going on a lower setting for a few days more.
Its a shower room so not a big room.

On Wednesday, 5 February 2020 18:54:28 UTC, ss wrote:
On 05/02/2020 17:57, Martin Brown wrote:
At this time of year you need to leave plaster much longer to fully dry
out before you try to seal it or you will be storing up trouble.
Overpainting with a dense white emulsion will usually cover it.

It will be about 2 weeks after the flood before I attempt to sort the
ceiling, have had a dehumidifier running for the last 5 days and will
keep it going on a lower setting for a few days more.
Its a shower room so not a big room.

FWIW I'd leave it longer. 8 days might do but I'd not be confident.


NT

On 06/02/2020 07:26, Chris Hogg wrote:
On Wed, 5 Feb 2020 22:12:17 -0800 (PST), wrote:

On Wednesday, 5 February 2020 18:54:28 UTC, ss wrote:
On 05/02/2020 17:57, Martin Brown wrote:
At this time of year you need to leave plaster much longer to fully dry
out before you try to seal it or you will be storing up trouble.
Overpainting with a dense white emulsion will usually cover it.

It will be about 2 weeks after the flood before I attempt to sort the
ceiling, have had a dehumidifier running for the last 5 days and will
keep it going on a lower setting for a few days more.
Its a shower room so not a big room.

FWIW I'd leave it longer. 8 days might do but I'd not be confident.


NT
I'm leaving mine for months. I check it occasionally with a moisture
meter, and it is drying, slowly, but it's on the ceiling, not exactly
'in your face', and I'm in no hurry. I'll probably repaint it after a
lengthy spell of dry weather.

I have generally found it better to repplace plasterboard and reskim.

Or if it is plaster over lath, just replaster anyway




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Dennis Miller

A decent stain blocker should do it. At the last house we had a bad water leak below the bathroom which because the water was mixing with half a century of accumulated dust above the PB produced some very dark stains. I went to a decent decorators supplier and got a stain blocker which required a few coats, two if I remember correctly. After two coats of emulsion we never saw the stains again. Previously we applied many coats of emulsion just to find the stains reappear. Unfortunately I cannot remember the make having had a purge of old paint tins a while back but that would my first port of call.

Richard

On Wed, 05 Feb 2020 12:30:15 +0000, Chris Hogg wrote:

I have ordered some stain block which I will use before
repainting.
Should i just go with that or should I give the ceiling a clean
first
possibly with a mild bleach solution.

Only need to clean to remove dust or flaking paint (edges will then
need sanding or filling). Stain block will do the job or any oil
based paint, though gloss might make the emulsion a little harder to
apply evenly.

... when it's fully dried out I shall just paint over it with ordinary
emulsion, using as many coats as it takes to hide it.

Which be a lot. Even if you get it covered it come through after
time.
--
Cheers
Dave.

On Wednesday, 5 February 2020 15:24:33 UTC, Dave Liquorice wrote:
On Wed, 05 Feb 2020 12:30:15 +0000, Chris Hogg wrote:

I have ordered some stain block which I will use before
repainting.
Should i just go with that or should I give the ceiling a clean
first
possibly with a mild bleach solution.

Only need to clean to remove dust or flaking paint (edges will then
need sanding or filling). Stain block will do the job or any oil
based paint, though gloss might make the emulsion a little harder to
apply evenly.

... when it's fully dried out I shall just paint over it with ordinary
emulsion, using as many coats as it takes to hide it.

Which be a lot. Even if you get it covered it come through after
time.
--
Cheers
Dave.

Oil based undercoat is the answer

Jonathan