Edwardian houses - improving insulation & Maintenance issues

[Yazar]

andy43 said:

Covering 200 year old walls ...won't allow the walls to expel the moisture enough long term I reckon.

Had the people who built the house seen my centrifugal bathroom extractor fan, they would have dropped to their knees and started praying to the wonderous alien god before them

But yes airflow needs to be maintained via keeping the airbricks clear and common sense applied when fitting insulation and vapour barriers.