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depiction:


DA01k_

Ceiling, roof, 25°: flat or pitched roof exposed to outside air – back-ventilated – heat flow ascending (BG1) – IBO benchmarks 2020
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0,117 W/m²K
A++
A+
A
B
C
D
E
F
G
OI-Class (BG1)4
A
mass 149,6 kg/m²
PENRT 1091 MJ/m²
GWP total -62,9 kg CO2/m²
AP 0,255 kg SO2/m²
no. type layer d
cm
λ
W/mK
R
m²K/W
ΔOI3
pts/m²
1 homogene Schichthomogene Schicht Betondachsteine (Cement roofing tile / concrete roofing tile (2100 kg/m³)) 2,61 ¹ ¹ ² 9
2 inhomogene Schichtinhomogene Schicht inhomogeneous (parts normal to the eaves) 3,00      
    57,5 cm (92%) Vertical air layer, heat flow up 26 < d <= 30 mm 3,00 ¹ ¹ ² 0
    5 cm (8%) Timber (475 kg/m³ - e.g. spruce/fir) - rough, technically dried 3,00 ¹ ¹ ² 0
3 inhomogene Schichtinhomogene Schicht inhomogeneous (parts parallel to the eaves) 5,00      
    57,5 cm (92%) Vertical air layer, horizontal heat flow 45 < d <= 50 mm 5,00 ¹ ¹ ² 0
    5 cm (8%) Timber (475 kg/m³ - e.g. spruce/fir) - rough, technically dried 5,00 ¹ ¹ ² 0
4 homogene Schichthomogene Schicht Unterdeckplatte Holzfaser (Wood fibre WF-WD (250 kg/m³)) 2,20 0,057 0,39 5
5 homogene Schichthomogene Schicht Holzfaserdämmplatte (GUTEX Thermosafe-homogen) 24,00 0,043 5,58 22
6 homogene Schichthomogene Schicht Abdichtungsbahn (BauderTOP DIFUPLUS) 0,06 0,500 0,00 ² 3
7 homogene Schichthomogene Schicht Brettsperrholz BBS (5-lagig) (binderholz Brettsperrholz BBS (Fichte)) 10,00 0,120 0,83 16
8 inhomogene Schichtinhomogene Schicht inhomogeneous (parts parallel to the eaves) 6,00      
    56,5 cm (90%) ISOVER ULTIMATE UKF-034 twin Untersparren-Klemmfilz, vlieskaschiert 6,00 0,034 1,76 5
    6 cm (10%) Timber (475 kg/m³ - e.g. spruce/fir) - rough, air-dried 6,00 0,120 0,50 0
9 homogene Schichthomogene Schicht Rigips Feuerschutzplatte 1,25 0,250 0,05 2
    Rsi / Rse = 0,100 / 0,100  
    R' / R'' (max. relative error: 1,2%) = 8,677 / 8,472  
    building element 54,12   8,574 60

¹ not relevant
² layer is OI-relevant from BG1
³ U value (Heat transfer coefficient) calculated according to ÖNORM EN ISO 6946.
4 For the OI class, the U-value of the component is taken into account in addition to the ecological key figures