Why is roof ventilation important?
Excess moisture and condensation can have detrimental effects on a building, causing damp, mould, and mildew as well as structural damage. This is particularly a problem in roof spaces which is why adequate roof ventilation is so important.
Since warm air rises and carries moisture with it, its only natural for it to end up in the roof space. When the warm air hits a cooler surface, such as a cold roof, it turns to condensation, which can sit on the surface or drip back down into the building. The solution is to ensure effective roof ventilation, so the moisture can easily pass out of the building envelope before condensation has a chance to occur.