All statements without guarantee

Perete balcon Exterior wall

created on 5.12.2021

Thermal protection Moisture proofing Heat protection

No condensate Temperature amplitude damping: 63
U = 0,58 W/(m²K) phase shift: 8,7 h
Thermal capacity inside: 460 kJ/m²K
GEG 2020 Bestand*: U<0,24 W/(m²K)

excellent insufficient excellent insufficient excellent insufficient

outside
10 4
50 3
320

250
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2

10 1

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inside
1 Cement screed (10 mm) 3 Extruded polystyrene (50 mm)
2 Reinforced concrete (250 mm) 4 Cement screed (10 mm)

Impact of each layer and comparison to reference values

For the following figure, the thermal resistances of the individual layers were converted in millimeters insulation. The scale
refers to an insulation of thermal conductivity 0,035 W/mK.

Reinforced concrete (2%)

Extruded polystyrene (XPS 035) Equivalent
insulation thickness
(WLS 035)

0 20 40 60 80 100 120 140 160 180 200 220 mm

08 95 Ti ba
u 5 5
41 O ige 0,2 nd 0,1
tzV dr eu =
U sta =
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är
m sta En En Bes 16 N bau V U= . ite au
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Be 20 EV eu M ßn 3-L eub
EnE 20 En 20 N San lma N
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Inside air : 22,0°C / 60% Thickness: 32,0 cm

Outside air: -21,0°C / 50% sd-value: 24,5 m Weight: 642 kg/m²
Surface temperature.: 16,1°C / -20,1°C Heat capacity: 571 kJ/m²K

*Vergleich mit dem Höchstwert gemäß GEG 2020 für erstmaligen Einbau, Ersatz oder Erneuerung von Außenwänden (Anlage 7, Zeile 1a,1b). Page 1
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Perete balcon, U=0,58 W/(m²K)

Temperature profile
Temperature profile
Temperature
20
1 2 3 4 Dew point
15
10
1 Cement screed (10 mm)
Temperature [°C]

5
2 Reinforced concrete (250 mm)
0 3 Extruded polystyrene (50 mm)
-5 4 Cement screed (10 mm)
-10
-15
-20
-25

0 50 100 150 200 250 300 350

Inside 0°C [mm]

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www.ubakus.de Outside

Temperature and dew-point temperature in the component. The dew-point indicates the temperature, at which water vapour
condensates. As long as the temperature of the component is everywhere above the dew-point temperature, no
condensation occurs. If the curves have contact, condensation occurs at the corresponding position.

Layers (from inside to outside)

# Material λ R Temperatur [°C] Weight
[W/mK] [m²K/W] min max [kg/m²]
Thermal contact resistance* 0,130 16,1 22,0
1 1 cm Cement screed 1,400 0,007 16,0 16,1 20,0
2 25 cm Reinforced concrete (2%) 2,500 0,100 13,6 16,0 600,0
3 5 cm Extruded polystyrene (XPS 035) 0,035 1,429 -19,9 13,6 1,8
4 1 cm Cement screed 1,400 0,007 -20,1 -19,9 20,0
Thermal contact resistance* 0,040 -21,0 -20,1
32 cm Whole component 1,713 641,8
*Thermal contact resistances according to DIN 6946 for the U-value calculation. Rsi=0,25 and Rse=0,04 according to DIN
4108-3 were used for moisture proofing and temperature profile.

Surface temperature inside (min / average / max): 16,1°C 16,1°C 16,1°C

Surface temperature outside (min / average / max): -20,1°C -20,1°C -20,1°C

Page 2
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Perete balcon, U=0,58 W/(m²K)

Moisture proofing
For the calculation of the amount of condensation water, the component was exposed to the following constant climate for
90 days: inside: 22°C und 60% Humidity; outside: -21°C und 50% Humidity (Climate according to user input).
This component is free of condensate under the given climate conditions.

# Material sd-value Condensate Weight

[m] [kg/m²] [Gew.-%] [kg/m²]
1 1 cm Cement screed 0,15 - 20,0
2 25 cm Reinforced concrete (2%) 20,00 - 600,0
3 5 cm Extruded polystyrene (XPS 035) 4,00 - 1,8
4 1 cm Cement screed 0,35 - 20,0
32 cm Whole component 24,50 641,8

Humidity
The temperature of the inside surface is 16,1 °C leading to a relative humidity on the surface of 87%.Most kinds of moulds
start to grow at relative air humidities of 80% or more. Mould grow is expected! To avoid mould formation, the surface

Commercial use only with Plus-, PDF- or Profi-Option (from 2.99 € / month plus VAT).
temperature should be increased by (additional) insulation.
The following figure shows the relative humidity inside the component.

100 Relative humidity (%)

1 2 3 4 saturation point
90
80
Relative humidity (%)

1 Cement screed (10 mm)

70
2 Reinforced concrete (250 mm)
60
3 Extruded polystyrene (50 mm)
50 4 Cement screed (10 mm)
40
30
20
10
0
0 50 100 150 200 250 300 350
Inside [mm]
0°C Outside
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Notes: Calculation using the Ubakus 2D-FE method. Convection and the capillarity of the building materials
were not considered. The drying time may take longer under unfavorable conditions (shading, damp / cool
summers) than calculated here.

Page 3
 All statements without guarantee

Perete balcon, U=0,58 W/(m²K)

Heat protection
The following results are properties of the tested component alone and do not make any statement about the heat protection
of the entire room:

Temperature profile
This document has been generated by the U-value calculator on www.ubakus.de. If you are harmed by the free use of these contents, the service provider is only liable in case of

36 Temperature at 3pm, 11am and 7am

34 1 2 3 4 Temperature at 7pm, 11pm and 3am
intent and gross negligence on the part of the service provider. For further information, please refer to the terms and conditions at https://www.ubakus.de/agb

32
30 1 Cement screed (10 mm)
Temperature [°C]

28 2 Reinforced concrete (250 mm)

26 3 Extruded polystyrene (50 mm)
24 4 Cement screed (10 mm)

22
20
18

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16
14
0 50 100 150 200 250 300 350
Inside [mm]
www.ubakus.de Outside

[°C] The surface temperature during the day

36 Outside
34 Inside
32
30
28
26
24
22
20
18
16
14 Phase shift: 8.7h
12 14 16 18 20 22 24 2 4 6 8 10 12
[time of day]
Top:Temperature profile within the component at different times. From top to bottom, brown lines: at 3 pm, 11 am and 7 am
and red lines at 7 pm , 11 pm and 3 am.
Bottom:Temperature on the outer ( red ) and inner ( blue ) surface in the course of a day. The arrows indicate the location of
the temperature maximum values . The maximum of the inner surface temperature should preferably occur during the
second half of the night.

Phase shift* 8,7 h Heat storage capacity (whole component): 571 kJ/m²K
Amplitude attenuation ** 62,9 Thermal capacity of inner layers: 460 kJ/m²K
TAV *** 0,016
* The phase shift is the time in hours after which the temperature peak of the afternoon reaches the component interior.
** The amplitude attenuation describes the attenuation of the temperature wave when passing through the component. A value of 10
means that the temperature on the outside varies 10x stronger than on the inside, e.g. outside 15-35 °C, inside 24-26 °C.
*** The temperature amplitude ratio TAV is the reciprocal of the attenuation: TAV = 1 / amplitude attenuation
Note: The heat protection of a room is influenced by several factors, but essentially by the direct solar radiation through windows and the
total amount of heat storage capacity (including floor, interior walls and furniture). A single component usually has only a very small
influence on the heat protection of the room.

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