Thermal Insulation

1. Why should I choose exterior thermal insulation?

All walls, columns, beams and curtain wall surfaces on the exterior are insulated. And since there will be no remaining heat bridge, heat loss will be minimized.

* Building’s exterior shells are protected from negative atmospheric conditions. They are not subject to extreme heating or cooling, heavy rain or frost.

And since the building’s elements will be unaffected by sudden changes in the temperature, there will be no cracks or bubbling resulting from expansion or contraction. Thus, maintenance costs can be minimized and the lifespan of the building increases.

Moreover, reinforced concrete building elements (such as columns, beams and curtain walls) preserve their original resistance against earthquakes for many years.

2. Why should I choose the "Exelans Energy thermal insulation systems"?

Reliable Brand:
Exelans Energy Thermal Insulation System is developed with Polisan Boya experience as a fully integrated system that provides the best solutions to all architectural needs and building structures.
The Exelans Energy thermal insulation systems had been applied to millions of square meters of buildings for the past 6 years in Turkey.
High Quality: 
Each product in Exelans Energy thermal insulation systems is produced and developed in line with European Quality Standards in order to display the highest performance in thermal insulation after numerous long studies conducted in laboratories, which have been proved in the market.
Lasting Superior Performance: 
Exelans Energy thermal insulation panels and package systems produced in line with Polisan Boya’s production and quality control standards offer lasting and superior performance since they do not lose their technical properties over time.
Superior Service: 
Exelans Energy expert sales and technical teams are always on hand to help you access superior quality for your buildings.
Expert Contractors: 
The application of thermal insulation systems requires knowledge, experience and attention to detail. Even small mistakes may reduce the efficiency of the system significantly. The only way to prevent such mistakes is to work with contractors that have an Exelans Energy Application Certificate. Exelans Energy contractors achieve Exelans Energy application standards by going through a certification program and gaining the authority to give an application guarantee.
Perfect Decorative Appearance Alternatives: 
Exelans Energy offers decorative alternatives to buildings with different profile types, topcoats and paint options, as well as unlimited solutions for architectural details. Moreover, with the help of the colorization department established within Polisan Boya, more value is added to your building. And thanks to the great appearance, the value and prestige of the building increase.

3. What thermal insulation materials are used?

Thermal insulation materials are special lightweight materials that resist heat transfer in order to minimize heat loss and gain. In Turkey, generally:
   - rock wool, EPS, XPS, carbon EPS and polyurethane panels for walls, floors and roofs
   - heat, sun and heat + sun control coated insulation glass units and insulated frames for windows 
   - fiberglass, rock wool, polyethylene foam, elastomeric rubber foam, polyolefin foam for installation elements such as air ducts, pipes and valves

4. What products are used in the Exelans Energy thermal insulation system packages?

* Exelans Energy thermal insulation panels (EPS, Neopor, Carbon Innova, XPS, rock wool)
Thermal insulation adhesive mortar
Fiber thermal insulation plaster
160 gr/m2 thermal insulation glass fiber mesh
Thermal insulation mechanic dowel varieties
Thermal insulation profiles (PVC, aluminum meshed or unmeshed corner profiles, sub-basement profile)
Thermal insulation special profiles (Windowsill extension, dilatation, woodwork end profiles, etc)
Thermal insulation decorative coating
Exterior paint primers
Exterior paints (smooth or coarse)
Exelans Energy Decor Profiles

5. Do Exelans Energy Panels have CE Certificates?

Exelans Energy EPS, Exelans Energy Neo and Carbon Innova Panels have CE certificates.

6. Do your products have TSE Certificates?

Our products have TSE certificates. We have TSE certificates for our Exelans Energy thermal insulation panels and Exterior Paints, and TSEK certificates for Exelans Energy Thermal Insulation Adhesive Mortar, Exelans Energy Thermal Insulation Plaster and Decorative Coats.

Moreover, Exelans Energy thermal insulation system is a thermal insulation system with elements working in harmony, from adhesive mortar to topcoat and paint. For the first time in Turkey, this product received the certificate for compliance with TS EN 134999 "Standard for Expanded Polystyrene Based External Composite thermal insulation systems Used in Buildings.”

7. What does the coefficient of thermal conductivity λ (W/mK) mean?

It indicates how much a material conducts heat based on its physical and chemical structure. Below are the thermal conductivity coefficients of different product groups:


λ=0.45 W/mK

EPS (16 kg/m³)

λ=0.040 W/mK

Exelans Energy Neopor / Carbon Innova

λ=0.032 W/mK

Exelans Energy XPS

λ=0.030 W/mK


λ=58.00 W/mK

Reinforced concrete

λ=  2.10 W/mK

Rock wool

λ=0.040 W/mK


λ=  0.20 W/mK

As value λ gets smaller, thermal conductivity decreases.


8. Which materials are accepted as thermal insulators?

Materials whose thermal conductivity coefficient is less than λ=0.065 W/mK are defined as thermal insulation materials. Others are defined as construction materials. 

9. How do the insulation values of materials at different thicknesses compare?

The thermal resistance (R) value is the criterion that gives us the most accurate information about the performance of an insulation material and its comparison with other materials. Thermal resistance is defined as the resistance of a material against the heat transfer between two mediums. As this value gets higher, the materials resist heat transfer more. The product with a higher R value has a higher insulation value.
R=d/ λ d is the thickness of the material in meters.
λ is the thermal conductivity coefficient of the material in terms of W/mK.
R is the thermal resistance of the material in terms of m²K/W.
You can get an idea about the insulation performance of various products on offer by comparing their thermal insulation based on this property.


10. What does the heat transmission coefficient U (W/m²K) mean?

This is the heat transmission resistance of the construction element composed of different elements used one after the other on walls to be insulated. U depends on the thermal conductivity coefficient (λ) and thickness on the heat transmission side. As U gets smaller, heat loss reduces.

U=1/R U: Heat Transmission Coefficient

11. What are the dimensions of Exelans Energy Panels?

Exelans Energy EPS (white), Neopor (gray) and Carbon Innova (gray) panels produced between the densities of 16-30 kg/m³ are offered as 50 x 100 cm with thickness options from 2 to 10 centimeters.

Exelans Energy XPS Panels produced in densities of 22 kg/m³, 26 kg/m³ are offered as 60 x 130 cm with thickness options of 3 to 8 centimeters.  

Exelans Energy XPS Panels produced in densities of 28-30 kg/m³, 30-32 kg/m³ are offered as 60 x 130 cm with thickness options of 3 to 8 cm centimeters.
And Exelans Energy Rock wool Panel is offered as 50 x 100 cm with thickness options of 3 to 8 centimeters.

12. Are these polystyrene-derivative thermal insulation panels disappear?

Since Exelans Energy Panels are derived from petroleum, it is not possible for them to disappear or melt away by themselves. Thermal insulation systems have been and are still successfully applied to millions of square meters in Europe and many countries around the world for the past 50 years.  

As long as your building stands still, Exelans Energy thermal insulation system will do the job.

13. Why are Exelans EPS and CARBON EPS more flexible?

Among Exelans Energy thermal insulation panels, EPS and carbon EPS are produced at a minimum density of 16-kg/m3, which is a highly recommended European Standards and the most suitable solution in terms of engineering. Based on this density, the panels gain the ideal flexibility. For exterior applications, the flexible insulation panels are preferred rather than rigid panels on upper floors.

14. Why is “water vapor permeability” is in thermal insulation panels?

The water vapor produced inside a structure at a specific amount every day is discharged through the exterior surface by diffusion. If the water vapor permeability of the panels used for insulation is low, this naturally discharged water vapor goes elsewhere and causes the formation of moisture and mold on interior walls, increasing the risk of sweating and condensation. Buildings insulated with Exelans Energy EPS, carbon EPS and rock wool breathe much more comfortably, which facilitates the discharge of water vapor from the building.

15. Do Exelans Energy thermal insulation panels absorb water?

Exelans Energy Polystyrene Panels have a water absorption capacity way below limit values, such as maximum 3% in EPS derivatives and 0.5% in XPS, when they are fully submerged in water and kept in water for 28 days, according to TSE standards When the fact that the water on a building’s surface flows down because of gravity (since such high exposure to water is not possible on the building surface), Exelans Energy Panels will not absorb any water in real life situations.

16. What is the fire resistance of Exelans Energy thermal insulation systems?

Exelans Energy EPS, Neopor, Carbon Innova and XPS thermal insulation panels ability to resist fire is Class E, according to TS EN 13501-1 standard (according to the old regulation DIN 4102, Class B1 Fire Resistance). The heat resistance of Exelans Energy Rock Wall thermal insulation panels is Class A, according to the same standard.

17. Will there be any change in the angles and dimensions after the application of Exelans Energy Polystyrene Panels?

Exelans Energy polystyrene panels are rested according to standards after production. There is no change in their dimensions or angles during or after application.

18. What are the required properties for the meshes used in thermal insulation?

The quality of the glass fiber mesh used in thermal insulation is key to the long-term resistance of the entire thermal insulation system. Thus, meshes used in thermal insulation should be produced from alkali-resistant glass fiber and weigh 160 g/m2. All meshes found in Exelans Energy thermal insulation system are produced with special coatings that are resistant to alkalis.

19. What is the difference between Exelans Energy Decorative Coat and Polisan Rough (Exelans, Natura A1) paint? Which one should I choose?

Exelans Energy Decorative Coats are cement based and are in powder form in the packaging. They are applied after mixing with a specific amount of water. Exelans Energy Decorative Coat must be applied with Polisan External Paints in two coats.

Exelans or Natura A1 Rough paints have hydron technology and silicon additives. They are ready to use and the leftovers can be preserved and used later. In addition to 24 vivid stock color options, they can also be produced in the color of your choice in the minimum order amount.

20. What is the majority needed to take a thermal insulation decision based on the property law?

In cases that a 51% majority is constituted in the complex or apartment, thermal insulation can be applied by authorizing the apartment and/or complex manager.

21. What are the standards and regulations that need to be followed in buildings regarding thermal insulation?

The 2008 Regulation TS 825 on Building Thermal Insulation Rules and Building Energy Performance (BEP) need to be followed while applying thermal insulation.

22. What buildings are covered by the TS 825 Standard?

Existing building: In the entire building or independent sections of the building, the standard should be followed in terms of ensuring given or recommended thermal conductivity coefficients or lower values.

New constructions: Covers the rules for the calculation of the heating energy need of the building that will be constructed by the engineering company that prepared the project, the highest heat loss value that will be allowed and the method of presenting the information about these calculations.

23. What should be the thickness of the thermal insulation on walls according to TS 825?

In TS 825, cities and some districts are classified under four different degree-day regions according to the climate conditions of their geographical location. And for each degree-day region, acceptance criteria such as monthly temperature averages and magnitudes of solar energy radiation used in calculations are determined. Below, degree-day regions and their insulation thicknesses according to TS 825 are given.

U values recommended by TS 825:




Panel Thickness

Region 1


4 cm

Region 2


5 cm

Region 3


6 cm

Region 4


8 cm

24. How is Exelans Energy thermal insulation system applied?

Exelans Energy thermal insulation panels are firmly affixed to the exterior surface using Exelans Energy Thermal Insulation Adhesive and after a minimum of 24 hours they are fixed with Exelans Energy Dowels. The surfaces of the panels are plastered in 4mm thick Exelans Energy Thermal Insulation Plaster with a layer of Exelans Energy Glass Fiber Mesh in between. On top of this plaster coat is applied Exelans Energy Mineral Coat and then two coats of one of the Polisan paint alternatives. The application is then complete.

25. What is the cost of Exelans Energy thermal insulation systems per square meter? What is the cost of labor?

The Exelans Energy thermal insulation system is composed of four different system packages (EPS, XPS, rock wool and carbon EPS). The cost varies based on which package and which products you will use within the system. The labor costs differ based on the region and the size of the job.

For a net price offer for your apartment, your building must be inspected by Polisan Boya’s recommended contractors and for you to select the suitable insulation thickness and topcoat decorative material.

26. Who can I ask to apply Exelans Energy thermal insulation systems? Can I apply the system myself or with a workman that I know?

Experts must examine your building and thermal insulation applications that will solve your problem must be made by insulation companies experienced in their field. The quality of the application directly affects the performance and lifespan of the thermal insulation system. Thus, when you contact Polisan Boya, we can arrange you to meet with a contractor closest to you.

27. Should we choose exterior or interior thermal insulation for our building?

On walls, choose an exterior thermal insulation application. In this way, both the thermal storage capacity of the facade material is used and the risk of condensation is eliminated within the wall cross section, as well as the interior surface of the wall. Moreover, heat bridges will not occur since the entire exterior surface is protected with insulation materials. However, for areas that require heating in the short term, internal insulation systems should be chosen.

28. Is it possible to apply thermal insulation to window systems without changing the existing frames?

If the existing frame has the adequate properties, it is possible to use heat control or heat and sun control coated insulation windows with superior insulation properties besides wider intervals (12mm or 16mm) by only making small adjustments on the glass mounting holes. And it is possible to make single-glazed wood frames suitable for insulation by adding a lath.

29. Can Exelans Energy thermal insulation systems be applied to wood and concrete?

Exelans Energy Thermal Insulation Systems can be applied on concrete boards. Exelans Energy thermal insulation systems can be applied to concrete boards with Exelans Energy F1 Acrylic Thermal Installation Adhesive and Exelans Energy F1 Polyurethane Adhesive. It is possible to make application on wood with Exelans Energy OSB Dowel.

30. Which surfaces should the Exelans Energy thermal insulation systems be applied to?

Regardless of the surface properties, we recommend thermal insulation is always applied to roughly plastered surface on new buildings. Applications to such surfaces will provide advantages both in terms of labor and materials consumption.
If the building surface to be insulated is not roughly plastered and it is made of hollow brick or cinder block, for example, more thermal insulation adhesive will be used.

Similarly, if the building surface is made of aerated concrete without rough plaster, the absorbent surface of the aerated concrete should be humidified based on weather conditions. Moreover, Exelans Energy Aerated Concrete Dowel must be used.

If the surfaces to be insulated are made of concrete board, OSB or wood, Exelans Energy Acrylic Thermal Insulation Adhesive and Exelans Energy OSB Dowel should be used.

31. How should Exelans Energy Thermal Insulation Adhesive be applied?

During application, 40% of the panel surface should contact the adhesive. Ensure that there is no space without adhesive on the corners and there is no adhesive at the joints of the insulation panels.

32. Is the application of rock wool thermal insulation panels different?

General adhesive bonding methods are used for Exelans Energy rock wool thermal insulation panels. The only difference is to use a dowel washer in order to improve fastening.

33. The building receives cold northerly air. Is it enough to insulate only the north face of the building?

Insulation should definitely be applied to the entire building. Insulation on a single side will cause formation of heat bridges and thus heat loss on the other faces without insulation will continue. All building components (roof, wall, floor, projection, window and frame) should be insulated.

34. Our building takes in water from outside. Would be a permanent solution to apply plaster or tar to the surface?

First of all, the factors behind the influx of water should be examined and precautions should be taken against them. If water influx is seen only on rainy days, then the cracks and holes in your building should be repaired by using water insulation materials.
If there is no visibly deep crack or hole in your wall and there are plaster bubbles, dark spots, mold and similar formations on the interior surfaces, then there is a thermal insulation problem.

35. Can thermal insulation be achieved with paint and plaster?

Thermal insulation can only be achieved with thermal insulation materials with low thermal conductivity coefficient and thickness in line with the standards. With materials applied in low thicknesses, such as thick paint or plaster, high performance cannot be obtained. As the thickness of a thermal insulation material increases, its insulation performance increases.

36. Do we need to apply a separate thermal insulation coating if the walls of our building are made of materials such as aerated concrete, brick or cinder block?

Materials such as aerated concrete, all bricks and cinder blocks are each construction materials, not thermal insulation materials, according to Regulation TS825 even though their thermal insulation values are low. Regardless of the materials used in the building, all surfaces including columns and beams, roofs and floors, should be insulated with thermal insulation materials, and special coated insulation glass units and insulated frames should be used on windows.

37. Do I need thermal insulation if I use coating materials such as mosaic glass, PVC or aluminum on my exterior surface?

Sidings do not provide thermal insulation. Generally these materials only change the outer appearance of the exterior and only sometimes resist impacts at heights that people can reach. The energy efficiency of the buildings is obtained through the use of thermal insulation materials behind these materials.

38. Is thermal insulation required for energy saving in installations?

Thermal insulation in installations can be precautions required in order to prevent heat loss at hot lines and heat gain at cold lines. With such installations, corrosion of pipes due to condensation is also prevented besides heat loss or gain.

39. Can thermal insulation be achieved by increasing the thickness of the glass?

Increasing the thickness of glass will make no contribution to thermal insulation and thus it is not possible to achieve thermal insulation with this method. The first solution for thermal insulation in glass is double–glazing, which traps dry air between the two panes and decreases heat loss by 50% compared with single glass.

40. What precautions can be taken on glass for insulation?

Insulation precautions on windows can be grouped into two based on different purposes. Solutions for heat insulation: Use heat-control coated insulation glass in buildings that are only heated. In winter, there is a significant heat flow from the interior to the exterior. Thus, in heated buildings, heat control coated windows limit this heat flow and energy is used more efficiently.

Solutions for heat insulation and sun control: Use heat- and sun-control coated insulation glass on building that are both heated and cooled.

Sun control limits unwanted solar heat during summer months. Thus, in buildings that are both heated and cooled, use heat- and sun-control coated insulation glass to ensure the desired comfort level, decrease the amount of energy spent cooling with air conditioners and limit heat gains through the windows.

41. We are living in a hot region. Is thermal insulation still required?

Thermal insulation offers savings on both the energy and fuel you consume to warm your home during winter and cool it during summer to create a comfortable living space. Since cooling requires more energy than warming, thermal insulation is also necessary in hot regions.

42. Can I use Exelans Energy thermal insulation panels for interior insulation?

Our company does not recommend such applications since the capacity of interior insulations' to fully prevent heat bridges (floors and cross sections of walls facing outside) brings numerous disadvantages such as condensation and sweating. You can get assistance from our technical personnel for spaces that definitely require such applications.

43. Can we get sandwich walls using Exelans Energy Panel between two walls?

Our company does not recommend sandwich walls due their inability to prevent heat bridges.

44. Do Exelans Energy thermal insulation panels also offer sound insulation?

Exelans Energy polystyrene thermal insulation panels provide minimal sound insulation. However, as known, mineral products such as rock wool and fiberglass panels offer definite sound insulation.

45. What is an Energy ID Card?

Energy ID Card includes basic information about the energy needs, consumption class, building’s insulation properties and the efficiency of heating and/or cooling systems.

Energy ID Card includes at minimum the information about the energy need, energy consumption class, insulation properties of the building and the efficiency of its heating and/or cooling systems. The Energy ID Card will also include a building’s annual energy consumption and greenhouse gas emission data per area of use, which is classified based on a reference scale ranging from "A" to "G".

Based on the Regulation on Energy Performance in Buildings published on December 5, 2009, it is mandatory to prepare an energy ID card for buildings that apply for a new building license as of 01 January 2011. And it is mandatory for old buildings to get an Energy ID Card until 2017.

Energy ID Cards are valid for 10 years from the date of issue. And at the end of the valid period, the card will be reissued based on a new report.

46. Who issues the Energy ID Card?

An Energy ID Card is issued by an engineering or consulting company for new buildings in the project phase. For existing buildings, an Energy ID Card is issued by energy efficiency consulting companies, established as of 2011.

47. Is Energy ID Card mandatory?

Yes. With the Regulation on Energy Performance in Buildings published in the Official Gazette No. 27050 on December 5, 2008, it is mandatory for old and existing buildings to have an Energy ID Card.

Your building must get an Energy ID Card by 2017. As of 2017, it will not be possible to rent or sell a building without this Energy ID Card. If you construct a new building, you cannot get a construction permit without this card.

48. What can we do to increase a building’s energy class?

Increasing the thickness of the Exelans Energy panel applied to the exterior of your building and applying insulation to the roof and floor is the best and easiest solution for improving your building’s energy class.

49. What are the advantages of a high-energy class?

It would be a major advantage in terms of selling or renting your building, since the amount of energy consumed for warming, cooling and ventilating a building in Class A is much less than a building in Class G. A high energy class means reduced energy costs.

Moreover, in the coming years, there is speculation that the government will take positive steps towards increasing the energy class of building with a revised taxing system based on energy class and the regulation of natural gas and electricity prices.

50. What is BEP-TR?

BEP-TR is Internet-based software that can calculate a building’s energy consumption per square meter and the subsequent CO2 emission based on this consumption.

The energy performance and emission class of a building can be determined according to the results of a BEP-TR calculation and the program generates the suitable Energy ID Card.

51. What would be the saving and investment redemption period with Exelans Energy?

Savings of 35-65% can be achieved based on the thickness of the panel and the sections of the building where they are used. The investment redemption period of insulation systems can be two to five years based on the amount and type of fuel consumed for heating and cooling.

52. Where can I buy Exelans Energy thermal insulation systems?

You can buy the system from Polisan Authorized Dealers, but if you want to benefit from the application service and our experienced contractors, we recommend you to contact Polisan Headquarters and let our experienced personnel guide you.