Patch Repair (photos included)

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Smudge01

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Following a leaky pipe under the floor I now have to patch repair some plaster where the water has sucked into the wall. The background is like mud with straw and small stones in it.

Should I let this dry out naturally, or use a dehumidifier? It's in a cold tucked away corner and will take a long time to dry out. Does it need to dry out?

I'm not too fussy about getting the perfect finish as a wardrobe goes into this corner and hides it anyway.

I guess it needs some sort of stabilizer. I was thinking of sticking some plasterboard over, then easifill. Is this okay, or what is the best approach.

Thank you.

upload_2021-2-7_13-55-37.png


upload_2021-2-7_13-56-8.png
 
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Smudge01. good evening.

Can I suggest you get a fan, do not bother with any heat just a fan that will move the air past and over the affected area? hy? because if you put a washing outside on the line in a flat calm it takes an age to dry, but if it is a breeze or good going wind the washing dries fast.

As for what the "mud" is ??? nearest I can think is a material called "Wattle and Daub" a primitive method of using mud to construct a wall, the Wattle as I recall was thin strips of timber made into a frame.

Ken.
 
Thank you.

Do you think gluing some plasterboard on that will be okay?
 
Can I suggest you see what happens after the wall dries out? if solid then Yes to P/Board and skim.

Ken.
 
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The 'Wattle and Daub' will definitely be solid but it's a bit bumpy with highs and lows. Can I use bonding and then skim?
 
That should work, the bonding, probably best if the "Wattle and Daub" is badly uneven?

As an aside? what is this Wattle and Daub attached to ? IE what is behind this material? seems somewhat unusual?

Ken.
 
Maybe stramit board, I've only ever seen wattle and daub on historic buildings.
 
Alastair, from what this image shows, there is [IMO] not enough straw??

Agree totally W&D is very historic, indeed I am not ashamed to say I cannot recall seeing it [OK I am old, but not that old?o_Oo_Oo_O]

Ken.
 
Just an amateur diyer here...

It is cob. It is not wattle and daub (there is no wattle)
What I do in that situation is stabilise it with NHL 2 hydraulic lime plaster, build it up, then finish with lime putty plaster.
A more purist approach would be just to use lime putty plaster.

I'd be nervous about trying to glue anything to cob, or using modern gypsum plaster.

I also wouldn't want to use a dehumidifier or fan to dry it before I'd stabilised the surface with plaster - hydraulic lime or better still, lime putty plaster will let it dry out naturally.
 
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