Airtightness of an old house

Question

Will improving the airtightness of an old house cause damp? We're trying to make our cold and draughty home warmer but we're worried about air flow and ventilation.

Mohbin · Answer

Hi there,

Airtightness is certainly great for saving money on your energy bills however if not done correctly can cause high levels of created airborne moisture settling on cold surfaces resulting in increased moisture levels within the structure and mould formation.

Julian · Answer

You have to make sure there's ventilations in the kitchen and in the bathroom then you shouldn't get any dampness as long as the building can breathe

Luke · Answer

Houses do need to breath but insulation loft

Between floors if you can 

And sealing round windows and doors Will definitely help

Adam · Answer

You can always do a 200 m roll out insulation top up just don’t block eaves for air flow

Airtightness of an old house

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