The main factor that may weaken the stability of the roof structure is dampness. On its negative impact it is particularly exposed rafter framing, which deform under impact of water. Therefore is important roof protection against getting in water into its internal structure.
The importance of the angle of the roof for leaks construction
Stacked on steep roofs, ceramic tiles (angle of inclination should not exceed 22 °), provide the free flow of water after covering the roof by gravity, not getting into the inner layers of the structure. It is very important here professional and stable attachment of the tiles using special clamps. If the tile is not properly attached, stronger wind can cause tearing of one or more tiles, which in turn can lead to the destruction of entire hipped roof end. Fundamentally tiles clamping every third, however, depending on the so-called. wind zone in which our house is located, you may need clipping greater numbers, and even all the tiles.
Roof tightness is also influenced by the proper execution of the initial roof covering. Choosing a project with a roof inclination angle of less than 22 °, it is necessary to apply additional security elements, in the form of a full boarding and roofing paper. This design of structure allows for stacking, tiles even on a roof with 10 ° angle, while ensuring optimum tightness.
How to protect the roof from dampness
It is important to pay attention to the seal those places that somehow protrude beyond the plane of the roof or interrupt the regularity of laying tiles. These include roof windows and chimneys. In their case, it is necessary to apply flashings draining rainwater off the roof window and skylight additional warming above patches, as well as materials for adhesives membranes. Additional protection is to be applied also in the ridge, which also has an important function in the ventilation of the roofing. Her treatment must be made with regard to an optimum balance between tightness and freedom of movement of air. The recommended solution is the use of ventilation in weather strip made of water-impermeable material, but at the same time having a small louvers, to support ventilation.
The important role of ventilation
High, and at the same tight ventilation helps to avoid or minimize the need for renovation of the roofing. Dampness can evaluate in a weakening of the rafter framing and reduce heat-insulating properties of roof, and excess of vapor constitutes a serious threat to the stability of the rafter framing. In addition, the impact can lead to growth of mold and fungi. Saturated wet mineral wool loses its optimum properties and no longer serve as an effective thermal insulation layer.