What is a Thermal Bridge? Why Does a Thermal Bridge Occur?
Thermal bridges are areas that insulate less heat than the surrounding of the building elements. In this case, the share of the air boundary layer on the heat transmission resistance increases in this section, so the surface temperature of the inner surface of the thermal bridge decreases and condensation occurs there. The effects of the thermal bridge on the fuel cost are not significant forthe process in which the thermal bridge is relativelyThe situation is the opposite for single windows, which are only considered asthermal bridges . The temperature of the inner surface of the thermal bridge should be increased in order to prevent condensation on the upper surface of the building elements and consequently mold formation
This too; Reducing the heat escaping from the thermal bridge by insulating against the outside temperature (increasing the thermal insulation reduces the percentage of the heat transfer resistance of the air boundary layer above 1/k)
Increasing the hot air entering the thermal bridging; Enlargement of the inner surface of the thermal bridge , good conduction of the surrounding of the thermal bridge, hot air blowing is done.
Thus , the heat transfer resistance based on the thermal bridge decreases by 1α and the share of the air boundary layer above the heat transfer resistance 1/k decreases.
The outer corner of a normal building creates a thermal bridge, as a small inner surface that gives off heat is faced with a large outer surface that receives heat. For this reason, condensation and mold will occur at the corners of the walls with the least thermal insulation .
What is Heat Transfer? How to Prevent Heat Transfer?
Heat transfer is from the high-energy (hot) side to the low-energy (cold) side. For this purpose, cold room insulations are designed and carried out in such a way that no heat enters from the outside, not so that the cold inside does not escape, contrary to what is known.
Heat transfer is defined as the transfer of energy between two or more objects with different temperatures by means of conduction, convection or radiation (or the combination of these paths with each other). Heat transfer by convection is mainly caused by the movement of molecules in masses. The fluid in motion between two surfaces at different temperatures provides heat convection during this movement.
Conduction heat transfer takes place in a stationary region, with the help of vibrations in the lattice structure of the molecules in contact with each other, the heat is transferred to a forward molecule. The quality of the thermal bridge related to the cold room doors is "heat transfer by conduction". What is sheathing in buildings ? We recommend that you read our article.
How Does a Heat Bridge Form? How to act on the thermal bridge?
A thermal bridge is formed when there is a gap between materials and structural surfaces. The main thermal bridges in a building are found at the joints of pavements and floors, claddings and cross walls; coatings and roofs, coverings and low floors. They also appear whenever there is a hole (door, window). These are structural thermal bridges. These thermal bridges are important depending on the type of wall or roof (insulated or non-insulated).
Thermal bridges represent low comparative losses (usually below 20%) as the total losses on the walls and roof are very high (approximately > 1W/m2K) if the exterior cladding is not applied correctly in buildings .
However, when the walls and roof are very well insulated, the percentage of loss from thermal bridges increases (more than 30%), but the overall losses are very low (less than 0.3 W/m2K).
Therefore in low energy buildings it is important to have very high thermal resistances for walls and roofs to have low heat losses from junctions.
Conduction heat transfer occurs with materials or sheathing materials with different jacketing qualities and heat absorption capacities . As a technical term, these exterior cladding materials , which reveal a " heat bridge ", are for a heat energy transfer that cannot be noticed with the naked eye. Thermal bridges can only be noticed with the help of thermal cameras. Thermal cameras capture infrared rays at a level that our eyes cannot detect and convert them into values that we can see on the screen. We also recommend you to review our article named Tricks of Sheathing .
Thermal bridges increase our energy costs by transferring heat to the low temperature region we are trying to protect. Because of the hard work of our cooling devices, we incur these costs in electricity bills (unknowingly).
At the design level, it is imperative to choose construction processes and components that reduce surface losses as much as possible and incorporate the smallest possible losses at the junctions of these surfaces. Whatever insulation system is used, there are relevant thermal, acoustic and/or fire safety solutions.
Generally speaking, when it comes to individual homes, very good floor insulation is needed and depending on the wall insulation , the floor should be covered with a floating floor or a brick system with built-in insulation .
Less fuel consumption is required for a cleaner nature and environment. Insulation It has been calculated that the CO2 (carbon dioxide) gases emitted to the atmosphere when a building is heated is 45% more than those emitted from a building that is not insulated with a thermal insulation plate . So far , we have simply answered the question " What is Eps jacketing? "
Extruded polystyrene rigid foam (XPS styrofoam), made of polystyrene material, are thermal insulation plates with homogeneous cell structure, produced for " insulation in buildings ". Extruded polystyrene " building sheathing materials" (XPS) are perfect jacketing materials with high compressive strength, excellent thermal conductivity metrics, in the B1 fire category, which do not absorb water and are not affected by moisture.
The places where XPS styrofoam sheathing foams are applied; It is among the " sheathing models " used in the insulation of building interior and exterior walls, floor insulations, basement levels, and roofs. "Metpor Dekor SheathingXPS sheathing plates as facade plates on the building surface. not recommend. Xps insulation panels are not used as exterior sheathing material on the building surface due to their chemical and physical structure .