Condensation in loft

[Johannes]

We had cavity wall insulation fitted this summer. Noticed that there is condensation on the underside of the (partially) boarded loft floor, this has never occurred previously.
Is there a connection or should I be looking for another cause?

 

[bathjobby]

Condensation (where none existed before) in a cold zone = loss of ventilation. Check that the cavity wall insulation they blew in hasn't blocked the vents in your soffits. I bet it has and you will need to clear it to open up the vents in them.

 

[mointainwalker]

Just look Dec/Jan posts - many queries/replies on this topic.