With the colder weather upon us there is the risk of a common problem with 1st floor domestic bathroom extractors. The roof spaces are often cold but the damp air in the bathroom fan extractor tubes will be warm. The result can be condensation forms into puddles in the vent tube which can be quite considerable. This water then either drips onto the electrics of the fan or can leak out onto the plaster board ceiling. The solution is to ensure the extractor fan installer/electrician insulates the ventilation tubing and takes due consideration of where any water puddle forming will end up. This unfortunately does add to the cost of an extractor installation.