Yes its that old wet chestnut, condensation in a loft.
We moved into this 1960s bungalow in May this year. All well until we had a problem with condensation last month, specifically windows streaming with water, a smell of mildew in the bedrooms and newly hung wallpaper that wouldn't dry. So I bought a dehumidifier which solved the problem in our living areas very quickly. However, during the current cold snap the breathable lining in our roof space has visible water droplets on the underside across most of the roof. There was no obvious ventilation in the loft so I installed soffit vents and put some lap vents in, but it doesn't seem to have made any difference. We have a good 250mm of insulation on the loft floor and the loft hatch is well sealed. The roof was replaced by a previous owner about 15 years ago.
I read somewhere that installing insulation boards between the rafters can help by limiting the cold areas where condensation can form. Would that help or might it cause other problems?
We moved into this 1960s bungalow in May this year. All well until we had a problem with condensation last month, specifically windows streaming with water, a smell of mildew in the bedrooms and newly hung wallpaper that wouldn't dry. So I bought a dehumidifier which solved the problem in our living areas very quickly. However, during the current cold snap the breathable lining in our roof space has visible water droplets on the underside across most of the roof. There was no obvious ventilation in the loft so I installed soffit vents and put some lap vents in, but it doesn't seem to have made any difference. We have a good 250mm of insulation on the loft floor and the loft hatch is well sealed. The roof was replaced by a previous owner about 15 years ago.
I read somewhere that installing insulation boards between the rafters can help by limiting the cold areas where condensation can form. Would that help or might it cause other problems?
