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depiction:

DA11a_

 Ceiling, roof: flat or pitched roof exposed to outside air – not back-ventilated – heat flow ascending (BG1) – IBO benchmarks 2020
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0,147 W/m²K
A++
A+
A
B
C
D
E
F
G
OI-Class (BG1)³
F
mass 90,5 kg/m²
PENRT 1679 MJ/m²
GWP total 7,84 kg CO2/m²
AP 0,722 kg SO2/m²
no. type layer d
cm		 λ
W/mK		 R
m²K/W		 ΔOI3
pts/m²
1 homogene Schichthomogene Schicht gewebearmierte Kunststoff-Schweißbahn (>1,7 kg/m2) (Polyethylene (PE) sealing sheeting) 0,25 0,500 0,01 ¹ 9
2 homogene Schichthomogene Schicht Mineralwolle Flachdachdämmung (Gefälledämmung) (ISOVER Metac FLP 1 Duratec Flachdach-Dämmplatte Großformat) 12,00 0,039 3,08 66
3 homogene Schichthomogene Schicht Mineralwolle Flachdachdämmung (ISOVER Metac FLP 1 Duratec Flachdach-Dämmplatte Großformat) 10,00 0,039 2,56 55
4 homogene Schichthomogene Schicht Abdichtungsbahn (sd=220m) (Bauder TEC KSD, Bauder TEC KSD DUO) 0,15 0,170 0,01 ¹ 4
5 homogene Schichthomogene Schicht Brettsperrholz BBS (5-lagig) (binderholz Brettsperrholz BBS (Fichte)) 12,00 0,120 1,00 19
    Rsi / Rse = 0,100 / 0,040  
    R' / R'' (max. relative error: 0,0%) = 6,795 / 6,795  
    building element 34,40   6,795 153
¹ layer is OI-relevant from BG1
² U value (Heat transfer coefficient) calculated according to ÖNORM EN ISO 6946.
³ For the OI class, the U-value of the component is taken into account in addition to the ecological key figures