White Mould within Loft Space

10 Mar 2021
Reaction score
United Kingdom
Noticed some white mould within my loft space and was wondering a few things:

1. Is this due to lack of ventilation, condensation, or both?
2. Within the pictures attached you can see felt only. I believe this is due to a window being removed (as there seems to be an old single pane window in the loft that would fit this) - what should I do about this?
3. What would you recommend doing to resolve this? I've read up on vacuuming the white mould, and then applying acrylic based mould paint - does this work?
4. I would be looking to floor the loft - any useful tips?

Note - there is no wetness on any of the panels - my thought is that it is dry rot - would this be accurate?

Thanks in advance,
Loft 1.jpg
Loft 2.jpg
Loft 3.jpg
Loft 4.jpg
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