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depiction:


SD 01: Steildach

Ceiling, roof, 45°: Flat or pitched roof exposed to outside air – back-ventilated – heat flow ascending (BG1) – IBO benchmarks 2012 project: Althaussanierung - Bestand client: Energieinstitut
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A++
RL6
2,468 W/m²K
A++
A+
A
B
C
D
E
F
G
OI-Class (BG1)4
G
mass 95,1 kg/m²
PENRT 373 MJ/m²
GWP total -34,4 kg CO2/m²
AP 0,0796 kg SO2/m²
no. type layer d
cm
λ
W/mK
R
m²K/W
ΔOI3
pts/m²
1 homogene Schichthomogene Schicht Dacheindeckung (Clay roof tiles (2000 kg/m³)) 3,00 ¹ ¹ ² 17
2 inhomogene Schichtinhomogene Schicht inhomogeneous (parts parallel to the eaves) 3,00      
    26 cm (87%) Vertical air layer, heat flow up 26 < d <= 30 mm 3,00 ¹ ¹ ² 0
    4 cm (13%) Timber (475 kg/m³ - e.g. spruce/fir) - rough, technically dried 3,00 ¹ ¹ ² 0
3 inhomogene Schichtinhomogene Schicht inhomogeneous (parts normal to the eaves) 3,00      
    76 cm (95%) Vertical air layer, heat flow up 26 < d <= 30 mm 3,00 ¹ ¹ ² 0
    4 cm (5%) Timber (475 kg/m³ - e.g. spruce/fir) - rough, technically dried 3,00 ¹ ¹ ² 0
4 homogene Schichthomogene Schicht Unterdachbahn (Building paper) 0,02 0,170 0,00 ² 0
5 homogene Schichthomogene Schicht Holzschalung (Timber (475 kg/m³ - e.g. spruce/fir) - rough, air-dried) 2,00 0,120 0,17 -1
6 inhomogene Schichtinhomogene Schicht inhomogeneous (parts normal to the eaves) 24,00      
    56,5 cm (80%) Vertical air layer, heat flow up d > 200 mm 24,00 ¹ ¹ ² 0
    14 cm (20%) Timber (475 kg/m³ - e.g. spruce/fir) - planed, technically dried 24,00 0,120 2,00 1
    Rsi / Rse = 0,100 / 0,100  
    R' / R'' (max. relative error: 9,2%) = 0,442 / 0,368  
    building element 35,02   0,405 17

¹ not relevant
² layer is OI-relevant from BG1
³ U value (Heat transfer coefficient) calculated according to ÖNORM EN ISO 6946. A++: U-Werte im Bereich der Markierung A++ (0,12 W/m²K) sind notwendig, um derartige Gebäude zu errichten. RL6: OIB Richtlinie 6 (April 2007); In ganz Österreich seit 1.1.08 verbindlich festgelegter max. U-Wert (0,20 W/m²K) für alle Neubauten sowie instandgesetzte bzw. erneuerte Bauteile.
4 For the OI class, the U-value of the component is taken into account in addition to the ecological key figures