The most important task of roofs is to resist all kinds of precipitation and the harmful effects of precipitation. All kinds of rainfall from outside are the most important factors that roofs are directly exposed to. It can damage the structure due to the condensation (moisture) that occurs in the water vapour formed in the kitchen, bathroom, etc. areas of our house. Moisture accumulation affects our house as much as natural rainfall from outside. Since the harmful effects of moisture affect not only on the roof but also on the whole of the building, removing it from the environment is important for a long life of the building and a comfortable life. When choosing the materials used for waterproofing on the roof, it is extremely important that they are vapour-permeable, i.e. breathing products for ventilation under the roof. The fact that the material to be used is not vapour-permeable may cause structural damage in the roof structure, i.e. the carrier over time, and will negatively affect the health of the users.
Using non-breathable products also negatively affects the materials used for thermal insulation. In case the thermal insulation material is exposed to condensation, its absorption of water formed as a result of condensation will reduce its insulation properties and the material will deform over time.
In order to minimize the damage caused by condensation on the roofs, the roof should be allowed to breathe. Allowing roofs to breathe is realized by throwing out the water vapour accumulated in the roof and the still hot air. Roof ventilation should be done by replacing the cold air coming from outside with hot, still humid air accumulating in the roof section or roof space.
The materials used under the ridge tiles used at the top junction of the roof are of great importance for the ventilation of the roof. Condensation under the roof can be prevented by providing air circulation with the dry ridge system (Mahyaser) used under the ridge tiles. In addition, it is necessary to use a ventilation tile on the roof. One ventilation tile to be used in 10 square meters plays an important role for the ventilation of the roof. In addition to these, eaves ventilation elements (eaves ventilation comb) to be used along the eaves under the first tile row can also be applied for ventilation under the roof.
It is also very important to apply the materials used for ventilation under the roof to create an air gap. In roof application, laying the tiles on the double lath system will create a ventilation area on the roof and in this way, the condensation we mentioned will be prevented.