Table 4 Minimum “s” distances in scenario SH1

From: Microclimate numerical simulation to obtain the minimum safe distances between a painted wood panel and the inner face of an exterior wall

Panel height

Minimum Channel width

 

Distance from panel to ceiling

Room wall height

Minimum temperature

RH at minimum Temp. in scenario SH1 (52% RH in the room)

 

s

s/h

h1

ht

Wall

Back

Front

Wall

Back

Front

m

mm

ratio

m

m

 °C

°C

 °C

%

%

%

2

25

0.013

0.5

3

5.0

16.3

16.6

100

64.3

63.1

1

20

0.020

1.0

3

6.0

17.4

18.1

100

59.9

57.2

0.5

20

0.040

1.25

3

7.6

17.5

18.1

100

59.5

57.2

2

40

0.020

3.50

6

6.5

16.5

16.8

100

63.5

62.2

1

30

0.030

4.00

6

6.5

16.8

17.3

100

62.3

60.3

2

90*

0.045

3.50

6

5.1

16.2

16.3

100

64.7

64.3

Isolated wall 2 m height with 60 mm EPS

2

20

0.010

0.50

3

13.7

17.2

18

76.2

60.7

57.6

Back protected with Aluminium layer 0.5 mm width

2

20

0.010

0.5

3

5.3

19.4

18.9

100

52.0

54.4

  1. If there is condensation in the wall (100% RH), the minimum required gap between the Wall and the painting to avoid damages is 20 mm
  2. Room width 3 m. Outside wall: limestone (1.8 W/m * K), width 40 cm
  3. SH = 7.5 g water/kg air; Dew Point = 9.7 °C; Room at 19.6 °C and 52% RH; Outside at − 3 °C
  4. *In this case there is a 15 × 5 cm cornice, 30 cm above the panel
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