What is this stuff on my painted walls and how should I treat it?

dulcificum · 18 Nov 2020 at 12:31

This is about three years growth but it must have been pretty slow because we didn't really notice it until now.

What is this? It's not damp or cold to the touch.

dulcificum · 18 Nov 2020 at 12:46

Thanks both. It looks kinda oily almost. But no it wasn't behind any furniture and I don't think there's that much humidity in the room.

Just found this in another room too. Also seems like mould but a different type?

dulcificum · 18 Nov 2020 at 13:44

Yeah all outside facing. Is Zinsser better than HG? HG seems to get better reviews especially for on paint. Also Cillit Bang seems good.

dulcificum · 18 Nov 2020 at 15:54

bloodiedathame said:
H+G is a mould spray and Zinsser is a paint. Clean up with the spray and repaint with the Zinsser and try to get a bit more airflow in the room (eg trickle vents) or dehumidifier.

Oh I thought they were talking about Zinsser Mould Killer. We will need to use a different paint to match the rest of the room.

dulcificum · 18 Nov 2020 at 15:55

koolpc said:
Condensation issue. Cold, outside wall. Warm air inside condensing on cold surface.

To be fair, there hasn't been any noticeable condensation at all on the walls. But will look into it.

dulcificum · 18 Nov 2020 at 16:09

Yeah but I can't use their paint as it won't match.