In order to identify the appropriate insulating solution, it is necessary to analyze how heat and  cold flows operate.  
Heat moves from hotter to colder zones. This process occurs due to different heat transfer  mechanisms. It is important to reduce and restrict heat conduction, convection and radiation  transfer in order to reduce and insulate it.  

It is process by which heat or electricity is directly transmitted through the material of a  substance when there is a difference of temperature or of electrical potential between  adjoining regions, without movement of the material. Conduction is a natural property of  materials.  
Heat conductive transmission is measured by Lambda coefficient.  
A low heat transmission coefficient means that the insulating material reduces conductive heat  leaks. The lower the lambda value, the more efficient in terms of reducing loss of heat by  conduction.  

Why is it said heat usually goes up?  
When the molecules in a liquid or gas get warm enough, their density changes and the hot air  (which is lighter) goes up. This process in known as natural convection.  
When this natural movement is accelerated by wind or other artificial elements, we call it  forced convection.  
When we insulate a closed cell with small cell sizes, convection is inhibited within the cell.  Therefore, the cell becomes less likely to affect the surrounding cells and we can control heat  transmission.  

Radiation is energy that comes from a source and travels through space at the speed of light.  This energy has an electric field and a magnetic field associated with it, and has wave-like  properties.  
La radiación es la forma en que el calor se transfiere a través del espacio de un cuerpo a otro  como energía.  
The rate of heat transfer through radiation is controlled by:  

  • The difference in temperature between the surface that is radiating heat and the  surface that is receiving it. 
  • The distance between each surface. 
  • The emissivity of each surface. A low emissivity material repels radiation heat and  eliminates “furnace effect”.  

An efficient insulating solution also depends on the capacity to reduce heat transmission.

Lambda Value  
Lambda Value or Thermal Conductivity is used to measure the ability of a material to conduct  heat in an efficient way. Thermal conductivity is measured in W/K*m.  
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An efficient insulating material must have a low Lambda value which reduces heat leaks.  
Lambda values are usually considered as general. In order to know how a specific value and  thickness affect heat transmission, it is necessary to identify R Value.  

R Value  
R Value (or Thermal Resistance) is a measure of how well a specific material resists heat  transmission. R Value is measured in m²*K/W.  
The lower the Lambda value, the thinner the insulating solution and the higher the R Value. 

U Value  
U Value (or Thermal Transmittance) is the result of all R Values of the whole construction  system including fixation setting and air chambers. Thermal Transmittance is measured in  
In this way we can discover the ability of all the elements (construction system) to transmit  heat and cold between different spaces.  
The lower the U Value, the more thermally efficient the construction element is.  

Building Envelope  
The building envelope includes all the building components that separate the indoors from the  outdoors. Building envelopes include the exterior walls, foundations, roof, windows and doors.  
So that a building can have good thermal insulation and reduce heat loss, in addition to having  low values, it must have the least possible number of thermal bridges and at the same time  contain the transmission of heat, either by conduction, convection or radiation.  
Once you have described how an insulation works and its most characteristic values, we may  think that thermal insulating efficiency highly depends on layer thickness. 
However, the insulating systems manufactured by RTS can help to control the heat transfer at  the same time you reduce thickness because  

  • All ReveCork and Zeramic Extrem products have low Lambda Values which reduces  thermal conductivity. ReveCork products and made from vaporized natural cork being  based on thousands of closed, watertight and occluded air cells that achieve a very low  heat transfer by convection. 
  • Zeramic Cells products (based on entrained air microcapsules and low emissivity, with  very good SRI rates) control radiation heat transfer. 
  • This is how RTS insulating products work.  

As a conclusion, you will see that there is no need for extremely expensive insulating  solutions based on high thickness which mean a lot of money/square meter.  On the contrary, RTS products are the low thickness insulating solution and value for  money.