Valor R Isolamento

L/k.
Created by
Renato Passos, Eng. de Software
Reviewed by
Renato Passos, Eng. de Software

Last updated: Apr 18, 2026

m²·K/W
2,50

About this calculator

The Thermal Isolation R-Value calculator helps determine the thermal resistance of a material or isolation system. The R-Value is a measure of a material's ability to resist heat transfer, essential for evaluating isolation efficiency in buildings and air conditioning systems. The higher the R-Value, the greater the resistance to heat flow.

The R-Value is calculated as the ratio of the material's thickness (L) to its thermal conductivity (k). The formula is R = L/k, where L is expressed in meters and k in Watts per meter per Kelvin (W/m·K). By inputting the thickness and thermal conductivity values into the calculator, you obtain the R-Value, crucial for efficient thermal isolation projects.

The use of R-Value is fundamental in various applications, such as in civil construction, to evaluate the efficiency of isolation materials in walls, ceilings, and floors. It is also used in refrigeration and heating systems, where the goal is to minimize heat loss or gain. Knowing the R-Value helps select the most suitable materials for each application, optimizing energy performance and reducing operational costs.

When working with R-Values, it's essential to consider factors like humidity, temperature, and material durability, as these can affect isolation performance over time. Additionally, local regulations may specify minimum R-Values for different types of constructions, making it crucial to consult these guidelines when designing or evaluating thermal isolation systems.

Frequently asked questions

What is the thermal isolation R-Value?

The R-Value measures a material's thermal resistance, indicating its ability to resist heat transfer.

How to calculate the R-Value?

The R-Value is calculated by the formula R = L/k, where L is the material's thickness in meters and k is the thermal conductivity in W/m·K.

Why is the R-Value important?

It's crucial for evaluating isolation efficiency in buildings and air conditioning systems, aiding in material selection and energy performance optimization.

What factors can influence the R-Value?

Factors like humidity, temperature, and material durability can affect isolation performance.

Are there regulations for R-Values?

Yes, local regulations may specify minimum R-Values for different types of constructions.

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