Since moving in our build, I have noticed in the loft on the inside of the roof felt there is major condensation, so bad it's starting to drip.
The house is traditional brick and block and has 300mm loft insulation (insulation company said any more is pointless)
The house had nearly a year to dry out before moving in due to doing most the inside work ourselves in spare time.
We have core drilled about four 100mm holes on each gable end to get more air flow in there but the same thing is happening!
I've checked the seal on the loft hatch and even around the extraction fans and all seems fine.
What else could I do?
Thanks