Help.. Plaster over old rendering

Ciara

New Member
Hi,
Not sure if this is the right place to post this question?
I am having a very small extension to a 1950s house. The rendering is old and discoloured.
The extension had been built on the side of the house and the builder has not removed the render on what is now an inner wall. He is going to plaster over.

Is this likely to be OK over time?
Thanks
 
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