I live in a Victorian gable end terrace which is classed as 'hard to heat' and sufferers from mould/ condensation . I have taken all the insulation measures I can afford & treated all obvious sources of damp and leaks. In winter I have no choice but to close off some rooms as I cannot afford to heat them - not ideal I know but I check them daily for damp and mould & clean off if necessary .
My question is on a typical wet winter day in England ie currently 9 degrees centigrade with a Relative Humidity of 70 % , dew point 2degrees, and an internal room temperature in an unheated room typically a 3 -4 degrees higher , is following advice to open windows likely to help or create even more condensation? Also , same question but is it better to constantly leave windows opened just a crack , bearing in mind temperature drop to 0 degrees and even higher relative humidity during the night - or just open once or twice during the day?
I have tried to research this myself but cannot find a straightforward answer ( least one that I can understand ). I do understand that this is good advice for kitchen and bathroom whilst cooking / showering etc.
Any advice appreciated