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Ventilated facades


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2015-10-07

Ventilated facades play an important role in the aesthetic expression of the building and its integration into the surrounding landscape, the proceedings of which must comply with safety standards and environmental protection should not influence on nature.

The outside cladding of buildings plays a main role in shaping the urban landscape, but also has important functions for the protection of supporting structures of weathering the impact of atmospheric precipitation, solar radiation and create an enabling environment within the building (temperature, natural light, humidity, insulation and tightness).

It should be remembered that the design and aesthetic requirements of cladding should not get at the expense of durability, environmental and economic feasibility of using a ventilated facade system during the period of exploitation.

All kinds of exterior surfaces of buildings are tested in many ways: mechanical, chemical, thermal, and direct operation - a wind load behavior in atmospheric conditions at different humidity, air quality and strength of the wind.

Ventilated facades play an important role in the aesthetic expression of the building and its integration into the surrounding landscape, the proceedings of which must comply with safety standards and environmental protection should not influence on nature.

If you want to do right choice of subsystems and cladding you need to know the device of ventilated facade.

The air gap of ventilated facades

Ventilated facade systems should provide comfort inside space of the building and protect it from weathering and especially from the water infiltration into the walls of the building, which is the main reason of the deterioration and destruction of the bearing capacity of the frame.

Between layer of the cladding and the wall emerges a vented air gap, which, in combination with an insulating layer gets better the thermal efficiency of the entire system. The concept of developing a ventilated facade is to create a working system of exhaust steam and heat from the building's walls and put out it outside. Nothing should prevent the movement of air and vapor. The space should be free of any obstacles that may limit the maximization of the flow (bung, caused by the presence of structural or fasteners, surface irregularities insulation layer or facing material, and others.). That for making an upward movement of the air inside must be made of a suitable size of the ventilation holes on the upper and lower part of the front, optionally with protective gratings to prevent alien bodies.

The optimal size of the air gap is 40 - 70 mm, it was found scientific method and in practice.

The clearance less than 40 mm will not remove moisture effectively, particularly at high building frames; a small gap may create problems during installation, if the plane of the wall varies greatly. Especially negatively manifests itself no air gap and the installation of cladding close to the heater and the wall.

The clearance more than 70 mm will affect on the economic part of the project, because of long reach surface of facade requires heavier kinds of support. A part of facade construction will be ineffective; because of the increase the air gap impairs the circulation of air and vapor.Design ventilated facade system Nowadays the system of ventilated facades is the complex design which is supplemented by developments of manufacturing companies. Today it is not only a metal rail, wind insulation and cladding; it is a complex system combining a great number of elements and materials. Only structure can be divided into several parts: the subsystem (brackets, section (rails), anchoring elements, and clamps), fire protection devices (cutoff), insulation and vapor barrier, facing material.

The construction is going as follows, at first, the wall is marked for bracing brackets that are attached to the wall over asbestos fabric or other thermal pads which reduce friction between the elements and break the "thermal bridge". Insulation is fastened on the topof surface . Most of them are basaltic mineral wadding which passes through vapor itself. Everything is covered with vapor breathable membrane, which prevents the heat from the weathering of the building, ingress of vapor into the building insulation and swelling due to slanting rain. Further, the direction sections are installed. The facing material holds on them by dint to clamp, corners and etc.

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