Damp, with a sprinkling of mould

Funny really, as my parents house was built in 1985, there's no extractor fans, and they've never had mould issues. No vents on windows either. Maybe my parents just mop a lot and heat it all the time.
 
It's not impossible for black mould to grow on other types of damp but it particularly enjoys pure water so 85% of the time it is condensation. For first floor ceilings you should check insulation in the void above. Make sure it is continuous. As JohnD has outlined, control of internal environment is important to avoid excessive moisture building up. You could also consider structural insulation of walls or positive input ventilation. Look up Drimaster
 
jeds said:
It's not impossible for black mould to grow on other types of damp but it particularly enjoys pure water so 85% of the time it is condensation. For first floor ceilings you should check insulation in the void above. Make sure it is continuous. As JohnD has outlined, control of internal environment is important to avoid excessive moisture building up. You could also consider structural insulation of walls or positive input ventilation. Look up Drimaster
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As of today I have noticed rat droppings in the loft space above, got the council coming in a week but reckon they could've made holes in the insulation making it not continuous and therefore causing condensation?
 
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