help with wall for plastering

gaz2923 · 12 Aug 2010

right - i dont know how to link to my album where all my photos are but there are pics of the wall in there

the guy who plastered it last plastered over paint which had been applied to the bricks. there is a layer of yellow and then green over the top. the green paint became loose in places and the plater started to come with it.

The room is an old outhouse which is now a downstairs bathroom and the walls are not cavity ones so we get plenty of condensation.

i have started to remove the green paint but the yellow paint is stuck on pretty well.

my questions are:

1. what is the paint likely to be
2. am i ok plastering over the yellow paint (i was going to use a 9" grinder to score the wall so that it sticks better)
3. why are the bottom two rows of bricks black
4. why is it that the wall smells slightly damp (the bricks)

troweladdict · 12 Aug 2010

use photobucket m8

gaz2923 · 12 Aug 2010

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gaz2923
12 Aug 2010
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gaz2923 · 12 Aug 2010

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gaz2923
12 Aug 2010
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gaz2923
12 Aug 2010
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troweladdict · 12 Aug 2010

nice m8
id cleen it off then even just rake out some little bit of pointing as a key (WBA) or 2/3 coats of PVA strong 4:1 mix
then a tite coat of bonding devil float it
then two coat skim use muilti as it wil give you longer play time

troweladdict · 12 Aug 2010

dont hert too put a dob of pva in the bonding

gaz2923 · 12 Aug 2010

cheers, dont intend to plaster it myself lol just do the prep work and get someone in to do it lol

I just want some background so that I know what im talking about

roy c · 12 Aug 2010

You could also get an angle grinder and grind some "diamond" patterns (about 4" in size) all over the wall so it gives a "key" to whatever is used as the backing coat to the plaster. Or another alternative is to go over the area with a "scutchin'" hammer to give a "key". But I myself would use the grinder method....

troweladdict · 12 Aug 2010

grinder indoors love the dust man i can just tast it no lol if you getting a spread in too sort it he will do the lot for you make a key prime it and finish it why bust your balls over it your paying him for the job is ge gooner take you on as a lab to cut the cost

roy c · 12 Aug 2010

troweladdict said:
grinder indoors love the dust man i can just tast it no lol if you getting a spread in too sort it he will do the lot for you make a key prime it and finish it why bust your balls over it your paying him for the job is ge gooner take you on as a lab to cut the cost

This is where a water sprayer comes in handy mucka

gaz2923 · 12 Aug 2010

cus im tight and wanna save every penny i can lol

NickB_99 · 12 Aug 2010

gaz2923 said:
cus im tight and wanna save every penny i can lol

Always good to be careful with the cash, but if you prep the job and something goes wrong, there can be doubt who's fault.
You did say last time it was done wasn't successful.

If your chosen plasterer covers the lot you're ok.

An alternative maybe when he quotes, maybe he could guide your prep work to his requirement and adjust quote accordingly.

gaz2923 said:
The room is an old outhouse which is now a downstairs bathroom and the walls are not cavity ones so we get plenty of condensation.

In fact, does this mean a s/c render would be better?

roughcaster · 12 Aug 2010

DIYnewbee99 said:
gaz2923 said:

cus im tight and wanna save every penny i can lol

Click to expand...

Always good to be careful with the cash, but if you prep the job and something goes wrong, there can be doubt who's fault.
You did say last time it was done wasn't successful.

Click to expand...

How very true Newbee!!!! "preparation" is the key to any job, "especially plastering. Trying to save time and money on prep, can and will be expensive in the long run.

stevethespreader · 12 Aug 2010

if the wall is damp it looks like that the bottom 2 rows of bricks could be bitchumen paint where they have had a go at trying to cure the damp and if it still smells of damp you should sort that b4 any plastering takes place
edit
it wont let me say the word for what i want lol so another word for it is blackjack, the bottom two rows maybe blackjack

roughcaster · 12 Aug 2010

I "wouldn't even consider" putting gypsum plaster on the walls in that room, especially if the walls have no cavity, and is prone to heavy condensation. You're asking why the bricks smell of damp????,, because they are probably,,,,,,,, damp!!

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help with wall for plastering

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