What are the Right and Wrong in Thermal Insulation?
Wrong : Only as the thickness increases in thermal insulation, the savings increase at the same rate.
True: Walls are not the only places with heat loss in buildings. If other heat losses such as windows, roof and basement are not prevented, the savings will not increase at the same rate as the thickness.
Wrong : Adhesion can be done directly with cement-based product on surfaces that are polluted by environmental conditions in renovation works, without any further processing.
Correct: Before applying to such surfaces, weak surfaces should be removed from the surface with a water jet and then the application should be made.
False : Heat insulation can be made with plaster or paints without using heat insulation material .
Correct : Insulation is made with materials with a low heat transfer coefficient and a certain thickness. In this way, a certain heat resistance is provided.
Wrong : Renovations can be manufactured without technical inspection.
Correct: In order to avoid any problems in the future, before starting the application, the roof, floor, etc. Problems should be identified by making technical examinations at the points and necessary repairs should be made.
Myth : The condensation (darkening, mold or fungus) problem on the inner surface of the buildings can be solved with waterproofing materials.
True : Condensation is a thermal insulation problem and can only be solved with adequately thick thermal insulation materials to be applied outside the building.
Wrong: Sheathing is done for decorative purposes in buildings.
Correct: Sheathing is done for the purpose of thermal insulation. It also contributes to the beautification of the buildings due to the renovation.
Wrong : The same thickness of thermal insulation board is used for every building in the same climate zone for exterior cladding .
Correct : The thickness of the thermal insulation board to be used should be calculated considering the climate zone where the building is located, the building exterior materials and other criteria determined by TS 825, and the Building Energy Identity Class requirement.
Wrong : The only thing that matters in exterior thermal insulation applications is the quality of workmanship, all materials have the same properties.
Correct: The life of the exterior thermal insulation application is proportional to the correct application, and the compatibility of the system products to be used is directly proportional to the compliance of the products and the system with the quality standards.
Wrong : Renovation works can be done without dismantling the rain down pipes, air conditioners, iron joinery on the façade.
Correct: These units should be removed and moved to the sheathing surface for the application to be healthy and to intervene later.
Wrong: The cost of sheathing in buildings is quite high.
Correct: The exterior cladding system is economical. It pays for itself in 2 to 4 years with the savings it provides in heating and cooling costs and building maintenance and repair costs.
False : In all circumstances, triple insulating glasses provide better thermal insulation.
Correct: In order for triple insulating glasses formed in flat glasses to provide better thermal insulation than double insulating glasses, some conditions are required. For this reason, the properties of the glasses used in double or triple insulating glasses play a decisive role in providing better thermal insulation for these two uses.
Wrong : It is sufficient to insulate only the northern facade of the buildings in exterior thermal insulation / sheathing, or thicker sheets should be used on the northern facades and thinner sheets on the other facades.
Correct : Thermal insulation should be calculated as a whole. Thermal bridges are formed in places where building materials with different thermal conductivity are connected to each other, intersecting and intertwining with each other. For this reason, jacketing is required in all building components.
Wrong : Standard insulating glasses should be preferred because Low-E coated insulating glasses are expensive.
Correct: Choosing Low-E coated insulating glasses is a kind of investment for future earnings. The additional expenditure for these glasses, which is low compared to the benefit it will provide at the initial investment stage, is recovered in 1-2 years with the savings in energy costs, and it continues to provide profit for the remaining life of the building.
False: The density of the material is important in thermal insulation boards. With high density material, less thickness board can be used.
Correct: The properties that thermal insulation materials should have are not only the density of the material. When choosing the material, the type of material should be selected according to the details to be used.
Wrong: In the application made with 32kg/m3 sheathing plate, the building cannot breathe.
Correct : The water vapor diffusion resistance coefficient value is a necessary condition for determining whether the sheathing boards breathe or not. While this value is between 20 and 40 in EPS systems, this value is 80 in XPS systems. Sd (Water vapor diffusion resistance) = μ X d (thickness). It is clear that the values such as 1000 m and 1500 m specified in the standards cannot be reached when calculations are made according to the desired thickness and the " sheathing materials " used and their type. For this reason, XPS, EPS and mineral wool (glasswool, rockwool) materials breathe and there is no problem in terms of breathing when using all these materials in thermal insulation.
False : There is no need for thermal insulation in hot regions.
True: thermal insulation saves energy and fuel for heating in winter and cooling in summer. The energy consumed for cooling a building is more than the energy spent for heating. Therefore, the need for thermal insulation is higher in hot climate regions compared to cold climate regions.
Wrong : The quality of sheathing depends only on the quality of the material.
Correct: The quality and efficiency of sheathing depends not only on the materials, but also on the experience and practice of the master. High efficiency can be obtained from properly applied jacketing.
Wrong : I can have any team apply thermal insulation or I can apply it myself.
True : The building to be insulated must be examined by experts and the application for the solution of the problem must be done by companies that are experts in their field. Thermal insulation is an application that consists of many layers and each layer consists of important details. However, the company that will perform the application must be an authorized application dealer authorized by the manufacturer.
False : The performance of thermal insulation depends only on the thickness of the board.
TRUE : Thermal insulation is not only dependent on the thickness of the board, but is directly proportional to the heat permeability resistance. The thermal conductivity resistance is directly proportional to the plate thickness and inversely proportional to the thermal conductivity coefficient. The structures with the highest thermal insulation resistance are the ones created with materials with high material thickness and low thermal conductivity coefficient.
Wrong : Adequate and effective thermal insulation can be achieved with thin layers by considering only that the thermal conductivity is below a certain value, regardless of the application thickness.
Correct: The thermal conductivity property known as lambda in thermal insulation is not sufficient on its own, and it is very important that the product used is of the right thickness.
False : In our building, gas concrete, pumice block, brick and so on. used and there is no need for thermal insulation.
Correct: These types of building materials are non-bearing building materials for filling purposes and only contribute to the thermal insulation. Regardless of the material the building is made of, the need for thermal insulation material should be determined according to TS 825. All facades, roofs, ceilings and floors, including columns and beams, should be insulated with materials of appropriate thickness according to TS 825, and special coated insulating glass units and insulated joinery should be used in windows.
Wrong : Mineral wools (glass wool and rock wool) absorb water and cannot insulate.
Correct: exteriorThe fibrous materials used in thermal insulation are resolved with the right detail, and of course, it can be used if the application is finished so that it is not exposed to water. Thanks to the production technology of mineral wool, water absorbency can be reduced. In addition, since the sheathing system is a composite system, the water coming to the surface cannot reach the rockwool unless there is cracking in the last layer, thanks to the thin plaster applied on the rock wool and the last layer of water-repellent paint-plaster.
Wrong: External sheathing prevents the building from breathing. It is better to do it from the inside.
Correct: External insulation in buildings also prevents reinforcement corrosion, since it also insulates columns and beams. Thermal bridges can only be provided with external thermal insulation. All thermal insulation materials are products with vapor diffusion.
Wrong : After the application of XPS and EPS, it produces gas and adversely affects our health.
Correct : Both XPS and EPS use gas as a blowing agent and this gas is removed from the thermal insulation board by diffusion. There is no situation that will adversely affect human health. The fact that these products have a CE certificate means that they cause minimal or no harm to the environment and humans, and are in compliance with the building materials regulation and CE regulation.
Wrong: XPS styrofoam is no longer used in exterior thermal insulation .
TRUE : Product choice in exterior sheathing should be made by considering the type of building to be applied, quality, standard compliance and thickness. There is no harm in using thermal insulation materials such as XPS, EPS and mineral wool if they are produced in accordance with the system standards.
Wrong: 50% savings cannot be achieved in thermal insulation.
Correct: It is possible to achieve 50% or more savings when thermal insulation is applied in appropriate thickness and detail according to TS 825, according to the energy usage values of buildings with or without thermal insulation. If the thickness is increased, this ratio increases even more.
False : The insulation value of each gray or white EPS board is the same.
TRUE : The insulation values of both gray and white EPS vary depending on the raw material used and the production processes.
Wrong: By choosing one by one, heat insulation package can be created. It will be of better quality and reasonable price.
Correct: It is important to ensure the quality of the products in the system and their compatibility with each other. ETAG 004, TS EN 13499, TS EN 13500 sheathing system quality certificates are given to the products forming the system and to the whole system, it is recommended to use thermal insulation packages with these certificates. In this way, the life of the system is extended.
Wrong : Only the thermal insulation on the outer walls is sufficient.
TRUE: In a building, thermal insulation should be applied to the floor and roof along with all the facades. Contrary to popular belief, heat losses and gains are caused not only by the façade, but also by the heat transmitted from the roof and floor. When the floor of the building is a reinforced concrete element, the floor acts as a thermal bridge and causes heat loss by quickly transmitting the heat drawn from the building columns to the ground. On the other hand, since the heated air inside the building rises physically higher, to the attic, heat losses from the roof are also higher.
Wrong : BTB, PVC, aluminum etc. to the facade. There is no need for thermal insulation after coating materials are made.
Correct: The materials in question are " heat insulation materials "."It is not, these are materials with high conductivity, they do not have any insulating properties, thermal insulation cannot be made with these materials.
Wrong: To provide better thermal insulation with glass, it is necessary to increase the glass thickness.
Correct: The increase in glass thickness alone and under all conditions does not contribute to thermal insulation. However, as the glass area grows, the thickness of the glass must be increased. On the other hand, thermal insulation is provided by insulating glasses.
Wrong: XPS thermal insulation material is carcinogenic, it should not be used in buildings.
Correct: All insulation materials such as XPS, EPS, PU, mineral wool, etc. are harmful to health. The presence of the CE certificate on these products means that there is minimal or no harm to the environment and humans
.When making thermal insulation, the company that gives the cheapest offer should be selected.
Correct: While making thermal insulation, the quality of the material and company references , other privileges of both the implementer and the manufacturer should be taken into account, and the most suitable company should be selected among the companies that meet these conditions.
False : Only fuel savings can be achieved with thermal insulation.
Correct: Thermal insulation not only saves fuel, but also protects the building against external effects and corrosion, increases the value of the building and creates healthy environments.