PVA on outer wall Plaster to get rid of mould

[yashyashm]

Hi All,

I am in a semi detached house and the wall which is exposed to air and no sun got problem of mold. The walls are not plastered. One builder told me to plaster the outer wall with PVA added in mortar. This will fix the mold issues. can someone please advise on this ?

Thanks

Regards

 

[kbdiy]

That all sounds a bit Jackanory to me

 

[AronSearle]

Mould is likely caused by condensation.

Condensation occurs when air containing moisture hits a cold surface.

You either fix the issue by increasing the wall surface temperature (cavity insulation, or insulated plasterboard) or lowering the humidity through ventillation/other.

Or a bit of both.

I don't understand why the builder has suggested what he has, unless he thinks it is an issue of moisture penetration and is thinking of waterproofing.

 

[r896neo]

is this on the interior of the building or the outside?

The pva and plaster nonsense will not solve either.