Above all, we know that the ceramic roof tile is, by definition, a product that has some degree of permeability. International standards require, as is expected, that the values of permeability are sufficiently small so no difficulties in the deck may occur.
The roof tiles certified and guaranteed by Tejas Borja fulfil all standards broadly required. Therefore, when a filtration problem occurs is just unlikely any product liability on the tile.
In this sense, it is impossible to say what the reasons are unless a test by technical specialists is issued.
In general, the implementation problems or faulty installation of constructive encounters and the slopes are too low are the most common factors that affect the tightness of the roof. There may be several reasons for damp in the roof: Some moisture may show underside of the roof tiles at the time of the first rains specially if the roof is recently set.
Inappropriate ventilation is the factor with risk damp. Because of the lack of conservation of the roof by the accumulation of organic waste in the lace of the tile (accumulated dirt, leaves, debris from trees ...). In waterproof cover (fire exits, roof window, encounters with vertical walls or any other pop on the roof ...) bad joint encounters with lateral ridges, hips and valley.
Because of an incorrect pitch setting. Finally, an incorrect use of mortar, not allowing ventilation of the bottom of the tiles leads to accumulation of condensation.
It is recommended the roof to be checked and supervised by a roof specialist.