Same issues with our house, installation in 2004 severe dampness ever since. After a lot of hassle to get them to call out they finally arrives last week and confirmed the house had not been filled correctly, the rockwool installed had been done with an extreme number of voids causing damp spots. They have refilled our cavity and I am now going to chase them for compensation and damage to my interior walls over the last 7 years. Very bad workmanship, would never recommend.