ᐅ Mold behind radiator on exterior wall

Created on: 13 Nov 2023 21:51
K
Kirschkugel
Good evening everyone,
I’m new to the forum.

We are currently renovating a 200-year-old house (completely refurbished about 30 years ago). We have recently discovered the following and, even after extensive online research, we are unsure whether this is mold or not.

Close-up of two white pipes along a dirty wall with mold and rust stains.


Mold growth on a painted wooden surface next to a white pipe.

The affected area is just above the floor behind the radiator on the exterior wall. The wall is 40cm (15.7 inches) thick, double-walled solid construction and uninsulated. The house has hardly been occupied in the last six months and has not been properly heated since around February.

What do the experts say—is this mold? If so, how can we deal with it? Thank you in advance!
Winniefred15 Nov 2023 11:09
I wouldn’t suspect the basement either. A damp basement floor is normal and usually not a problem. It’s the same in our house, which has been working fine for 102 years. If it’s a niche that hasn’t been heated, then—assuming it’s mold at all—it’s probably not a big issue. If you want to be completely sure, you could send in a sample for testing. What are the further plans? If you’re renovating anyway, the niches will probably be filled in and new radiators installed or underfloor heating added.
K
Kirschkugel
15 Nov 2023 11:19
It’s reassuring to hear that your basement is similar.

There is still some debate about whether to close off the recesses or leave them as they are. There are two radiator recesses in the room, which obviously keep the radiators out of the way and free up space. If anything is done, the radiators will be replaced with new ones, as we don’t want to install underfloor heating.