Best process to fix and plaster this wall

Dboy1988

New Member
Hi all, I am looking for some advice on how to fix and plaster this room / wall, pictures attached.

I have just purchased a 1960's ex-council property, removed the wallpaper and found that the plaster behind it was blown and needed removing, behind the blown plaster looks like a cement render.

Ive had a little experience skimming before but just want to make sure and have confirmed, I fully understand what I am doing to make the right approach before I start.

Firstly, can I please get confirmed that the render behind is indeed a sand & cement render? its clearly been keyed ready for skimming. It's not lime right? I plan to remove the rest of the plaster on the wall fyi

I plan to PVA and cover the wall with a thin coat of bonding coat to level it out and make it that little bit easier to skim.

Ive found that the cement is cracked in some areas.

Where the cement is cracked, around the external walls such as the window wall, I plan to knock the cement back to the brick and replace it with weber OCR one coat render and key, I intend to use the OCR product because Ive not done rendering before and I just need to patch a gap in the cement about 1m long x 40cm in height, above the window, below the ceiling.

From what I understand using a hardwall or bonding coat can potentially cause damp issues on external walls, drawing in moisture? please let me know if I am wrong.

When using bonding coat, I will allow it to dry for 24 hours until it has turned darker brown and then I can skim, no PVA needed.

Another option, from what I understand, I could PVA and skim straight onto this cement render if I wanted to?

My main questions here are mainly about the cement render and if thats indeed what it is and also if its ok to use the weber OCR one coat render to replace the missing cement, but also any advice is appreciated.

It might be worth adding that in this house, the old plaster that was skimmed on the wall has a grey colour to it, not sure that is important?

Thanks in advance.
 

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Last edited:

ChrispyUK

Well-Known Member
Hi all, I am looking for some advice on how to fix and plaster this room / wall, pictures attached.

I have just purchased a 1960's ex-council property, removed the wallpaper and found that the plaster behind it was blown and needed removing, behind the blown plaster looks like a cement render.

Ive had a little experience skimming before but just want to make sure and have confirmed, I fully understand what I am doing to make the right approach before I start.

Firstly, can I please get confirmed that the render behind is indeed a sand & cement render? its clearly been keyed ready for skimming. It's not lime right? I plan to remove the rest of the plaster on the wall fyi

I plan to PVA and cover the wall with a thin coat of bonding coat to level it out and make it that little bit easier to skim.

Ive found that the cement is cracked in some areas.

Where the cement is cracked, around the external walls such as the window wall, I plan to knock the cement back to the brick and replace it with weber OCR one coat render and key, I intend to use the OCR product because Ive not done rendering before and I just need to patch a gap in the cement about 1m long x 40cm in height, above the window, below the ceiling.

From what I understand using a hardwall or bonding coat can potentially cause damp issues on external walls, drawing in moisture? please let me know if I am wrong.

When using bonding coat, I will allow it to dry for 24 hours until it has turned darker brown and then I can skim, no PVA needed.

Another option, from what I understand, I could PVA and skim straight onto this cement render if I wanted to?

My main questions here are mainly about the cement render and if thats indeed what it is and also if its ok to use the weber OCR one coat render to replace the missing cement, but also any advice is appreciated.

It might be worth adding that in this house, the old plaster that was skimmed on the wall has a grey colour to it, not sure that is important?

Thanks in advance.

Crack on
 
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