The problem of thermal bridges

thermal bridgesAn important component of heat loss occurring in a building you register through walls, the walls, the foundations and thermal bridges.
Altogether these heat loss can reach and exceed the 40% mass disturbances in a building.
The insulation of the walls is essential to reduce thermal dispersion, get great exercise and sensitive economies benefits in terms of living comfort.
The sound design of wall insulation of buildings must be made according to the thermal and mechanical resistance of insulating material that is used, proper placement and the ability to control the flow of water vapor.

thermal bridgesIn general a good thermal insulation of the walls is essential for many reasons:

Thermo-hygrometric well-being
And humidity issues (the right moisture and right temperature) are among those that most affect the level of comfort within the home.
If there are problems in masonry are detectable both visually (then easily found), and thermal sensations (feeling hot or cold).
The economical operation and environmental comfort largely depend on thermal and hygrometric behavior of the outer casing of the building. In particular the behavior of external walls depends on the materials that compose it and the position of the insulating layer over other layers. The insulation can be placed on the inner surface, outside, in jacket or as a barrier to any thermal bridges.
The Thermo-hygrometric well-being in an environment that is related to the termofluidodinamici in the same environment.
The position of the jets and the air output speed may give rise to air distributions that govern situations of poor thermal comfort.

Elimination of formation of condensation
The surface temperature of the walls can be, in the absence of an adequate thermal insulation, less than that necessary to ensure an adequate comfort and this could cause the formation of condensation.
In general the condensation on the walls of the buildings are classified into two main types:
to) the Interstitial condensation that occurs within the masonry.
(b)) the surface condensation that occurs when, for reasons of various kinds, the temperature on the inner surface of the wall falls below the dew point temperature in conjunction with high relative humidity of indoor air.

The main cause of condensation is determined by thermal bridges.
This is determined by the different thermal behaviour of walls and building structures. One poor thermal insulation therefore leads to an increase of heat losses and may cause the temperature decrease of the inner surface of the building so as to cause a high risk of condensation superficial.

pontiTermiciThermal bridges are found at House, pillars, window sills, balconies and even in the presence of diffuse structure heterogeneity (Joint type Malta between blocks of termolaterizi).
In summary the main causes of a thermal bridge are:
– the presence of different materials in the section of the building (es. infill masonry with brick reinforced concrete).
– geometric discontinuities in the shape of the structure (es. corners).
– disruption of the thermal insulation layer (es. pillars, watertable beams, doors and Windows, etc.).
To accurately identify these weaknesses you can use an infrared thermography ’.
termocamerairThis instrumental survey can help locate areas prone to condensate, thermal bridges, disturbances, plant losses and also allows better monitoring over time of housing of ’ building ’ and technological network.
Thermography allows you to measure and represent the infrared radiation emitted by an object. Radiation is a function of the temperature of the surface of the object and the camera is able to calculate and display this temperature.
Today the IR thermography is a well-established technique for verification of heat loss in buildings and for finding the critical points of the housing may condense and mold.

In summary then, the main adverse effects of thermal bridges are:

Heat loss
Thermal bridges are impacting significantly on the heat loss of the whole building. Their effects can also triple the heat transmission in a section of the building, While representing only a fraction of the surface.

Condensation
Surface condensation is one of the most common effects of thermal bridges. Occurs when the normal relative humidity levels of indoor thermal comfort conditions are combined with a surface temperature of the shell of the building that has the lowest value of the dew point.

Formation of mould
The formation of mold occurs when you have a particular combination of temperature, steam and favourable substrate. The most common types of fungi (mold) ripen in the presence of high humidity and low temperatures (0 – 15°(C)). A bridge heating supplies, due to the simultaneous presence of high relative humidity and low temperature, creates ideal conditions for mold growth.

Damage to the surface
The cyclic variations of the surface temperature will cause a Powdering of structure materials. And’ as was observed in 44% of cases these superficial damage are due to the presence of thermal bridges.

Reduction of thermal comfort
When the inner surface temperature of a part of (Wall, floor, etc.) is at least two or three degrees relative to ambient temperature, there is a feeling of discomfort in the vicinity of this surface.
This effect is particularly evident when large areas are involved. A typical example is the area between a non-insulated floor and the outer wall.
Usually, to limit such discomfort, It raises the ambient temperature, thus causing an additional loss of energy.

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When you have a chance to solve the problem of a structural thermal bridges, IgroDry 2301 will be able to resolve the problems of condensation, breathability and molds with ease, efficacy and rapidity of intervention, that's why.

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