Plastering over expanding foam
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Plastering over expanding foam
Dear All,
I’ve a plasterer coming on Wednesday to sort out a small room but I’ve got some prep work to do. I need this hole filling in. I was going to use cement and old bricks but it’s angling down and will be hard for me to get anything to stick.
If I fill the hole with expanding foam will plaster stick to it? And if so, will I need to hack it back so he can attach some dob and dabbed plasterboard?
Thanks,
Andy
I’ve a plasterer coming on Wednesday to sort out a small room but I’ve got some prep work to do. I need this hole filling in. I was going to use cement and old bricks but it’s angling down and will be hard for me to get anything to stick.
If I fill the hole with expanding foam will plaster stick to it? And if so, will I need to hack it back so he can attach some dob and dabbed plasterboard?
Thanks,
Andy
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- wine~o
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Re: Plastering over expanding foam
No it won't ... you'll need some sand and cement in there followed by bonding...
Doubt you'll have time for that to set in that timescale.
Verwood Handyman
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Re: Plastering over expanding foam
Ohh dear. Thank you. I’m terrible at knocking up sand and cement.
- wine~o
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Re: Plastering over expanding foam
buy a small bag of ready mixed mortar (wickes/b and q etc.) just add water and mix up in a small bucket. Not too wet or it'll slump.
Verwood Handyman
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Re: Plastering over expanding foam
Thanks WineO. I’ve cement and sand in the shed. Am I to assume it’s a 4:1 ratio?
- wine~o
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Re: Plastering over expanding foam
4/1 is about right, but looking at that hole you'll need summat to slow down setting, plasticiser for instance else it'll dy out too quick and crack...
Verwood Handyman
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