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Thermal imaging inspection of building and structures is an effective method of enclosing structuresdiagnostic upon construction works completion and during operational cycle, namely:
1. Determination of partial and general heat leakage.
2. Finding out the concealed construction defects.
3. Specification (evaluation) of enclosing structures resistance to the heat transfer.
Thermal imaging survey the apartment.
Thermal imaging survey of private house to one floor.
Thermal imaging survey of private house two or more floors.
Quite often air infiltration and exfiltration, i.e. uncontrollable air passage through hidden defects of windows, doors, wirings, pipes, coverings and steam insulation, is the reason for cold inside the house, condensate formation and subsequent growth of a mould, lowered humidity (over-dry air). While thermal losses through limiting structures, as a rule, are several times lower than the owner thinks.
There are special installations for determination of the leakage of air (BLOWER DOOR) - allowing to carry out the test for tightness. The Blower Door technology is a globally accepted methodology to examine tightness of a building allowing to measure air permeability and to identify places of latent defects in a structure.
The tightness test is a very effective decision to:
determine places of loss of heat of airflows inside a building;
check the quality of construction of a building before its purchase;
exert control over quality of the construction operations performed in the course of building construction.
The Blower Door system includes a powerful fan having several speeds. Speeds are regulated by means of the panel of settings, which is temporarily mounted in the external doorway. Some manometers are applied to determine the difference in pressure.
Tightness tests are made by the method of creation of the difference in pressure when by means of a fan mounted in the house door or window, in the building a "mini-vacuum" of 50 Pa is created. Thus air streams will flow inside through flaws of an insulating layer.
Test for tightness requires no special weather or temperature conditions and can be performed at any time of the year under any weather conditions.
When carrying out such an inspection some hours are required depending on the size of a building and complexity of its form.
The most effective performance of the test for tightness and the heat vision inspection is at a stage of construction and renovation as there is a possibility of correction of the found faults before completion of finishing works. At the same time quality of installation of windows, doors and a steam barrier is checked.
The heat vision inspection.
Performance of the heat vision inspection allows to diagnose:
faulty double-glazed windows, defects of installation of double-glazed windows;
faulty heat insulation of the limiting structures;
thermal bridges in the limiting structures;
faulty heating systems;
faulty sections of the heated floor systems;
location of heating elements of the heated floor systems;
faulty ventilation systems;
hidden defects, overheated electrical power network and supply elements;
places of formation of a condensate (dew-points), et al.
Application of one Test for tightness is restricted. In particular, by means of it a degree of tightness, as well as location of leak section can be determined, however it is difficult to establish an exact source. The leakage trajectory can pass through the entire building block (crossing all not tight sections). Such type of leak allows for a sufficiently large volume of air to get inside. Movement of air streams depends on the wind strength and direction, the form of a building and especially its roof etc. When the Test for tightness and infra-red heat vision filming is performed together, you can achieve the maximum reliability of control of air permeability of the building structure. Moreover, heat visors allow to record graphically the air infiltration and ex-filtration sections.
Thermal imager is an easy-to-use instrument for finding and checking the location of pipes and leaking location. Even when water pipes are encased in the floor or under a plaster. The heat of pipes emanates through a surface and they can be easily located with the help of thermal imager.
The typical example of thermal imager usage is the localization of leaking in the pipes of the heater systems "Warm Floor".
Leaks in the systems of the heating plant can also be quickly located and registered with the help of thermal imager.
Determining the exact location of the leak will allow to avoid the unnecessary digging and will cut expenses.
Thermal imager is the best and fastest device forstructural faults detection. By using thermal imager it is possible to prove easily that construction works were incorrect or poorly executed. Thermal imager shows heat leakage and air losses (points of draughts) that take place in building, in a form of high-quality colorful thermal pictures. By using thermal imager it is possible to prove easily that construction works were incorrect or poorly executed. Thermal imager shows heat leakage and air losses (points of draughts) that take place in building, in a form of high-quality colorful thermal pictures. Single piece glass among double. Flaw is not visible by the naked eye.
The complete drying-out of walls and other surfaces is frequently required in construction works. With the help of thermal imager it is possible to define areas where humidity is still present. They appear on an infra-red image as a "cold spot".
Visualization of energy losses is an improvement of heat-insulation.
Heat bridges not only specify the areas in building, where the energy is spent for nothing. These spots can also lead to condensation or deposition of moisture from the surrounding air. Mould later grows in these places, thus creating a risk for the health of the house inhabitants. Thermal imager easily determines the locations of the defects.
Thermal imager is very useful during reconstruction planning and for a quality evaluation upon new building inspection. During the process of building dehumidification, thermal imager allows to define the grade of drying-out and optimize this process. If this process can be quickened and if it can be well-proven with the help of infra-red image, that the building is fully dry – this building can be handed to the client quicker. It often means a bonus for the building contractor.
Thermal imager also gives valuable information during buildings and monuments reconstruction. Buildings covered by a mineral plaster become clearly visible in an infra-red image. By seeing load carrying structures it is possible to make a decision about expedience of their reconstruction. Separation of plaster from walls can also be recognized and prevented on the early stage that will allow minimizing the expenses.
Thermal imager is also used for finding out the air losses through determination of air exchange level of ventilation. During this process decreased pressure is frequently created. Because air pressure outside of the building is higher than the pressure inside of the building, air will try to enter through untightened areas. Airflow can be easily visualized by thermal imager.
After such areas are identified, they can be removed, right before sheathings and details will make it expensive and it will become hard to remove this potential building defect.
The roof coating leakages evaluation is also possible with the help of thermal imager. Water keeps a high temperature longer than the rest of the roof coating material and can be easily discovered by thermal imager at night, after the rest of the roof has cooled down. Instead of all roof replacement only moist areas of the roof can be recovered or replaced.
An internal climate in the apartment exerts an enormous influence on our well-being and working ability. The level of morbidity in companies can rise because of a bad and unhealthy climate in the building. Thermal imager can give useful information about functioning of the conditioning systems and air ventilation, and also about the radiators functioning. The location of workplaces (for example, in relation to draughts) can be optimized with the help of information received from thermal imager.
Fire safety. Existent cracks, locations of leakage and damaged brick in flues and exhaust channels of the heater systems can be easily revealed using thermal imager. Overheated areas, which are created in a flue, are easily visible by thermal imager. Flammable areas that are located too close to a heater and exhaust parts of the system also can be easily discovered.
Not only a building construction suffers from the mould, but also a health and allergy development hazard occurs in dwelling zones and offices. Fungus spores propagate preferably in moist areas. Mineral substances of walls, wallpapers and paint provide an excellent soil for fungi grow. Thermal imagers with special functions of the software for dew-point visualization specify the imperiled areas and automatically mark an image with a color. Thus a potential danger is revealed in time.