what is heat?

heat transfer methods

Fourier's law for heat transfer

thermal conductivuty of materials
units (W/m°C or W/mK) for A=1 sqm

When ∆20 K. Which is the amount of transfered heat through a wall of 0,2 m thickness made of : 1) Concrete

2) Expanded polystyrene

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thermal resistance of materials
R= E/K
units (mK/W)

U-value or transmitance
U= 1/R
units (W/m2·K)

measure of the heat that flows per unit of time and surface, transferred through a building system, formed by one or more layers of material, with parallel flat faces, when there is a thermal gradient of 1°C (1 K) of temperature between the two environments that it separates.

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building envelope parts

01 Building envelope. Basis
02 Building envelope. Thermal inertia
03 Building envelope. Insulation and free thermal bridges design

index

here you can find examples for your envelope

02 Building envelope. Thermal mass

03 Building envelope. Insulation and
free thermal bridges design

pen test for free thermal bridges

01 Building envelope. Basis

Optimal U-value of envelope depending on climate zone according to Passivhaus standard