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depiction:

SD 02a: Steildach saniert (Holzfaser)

 Ceiling, roof, 25°: Flat or pitched roof exposed to outside air – back-ventilated – heat flow ascending (BG1) – IBO benchmarks 2012 project: Althaussanierung - Variante client: Energieinstitut
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A++
RL6
0,127 W/m²K
A++
A+
A
B
C
D
E
F
G
OI-Class (BG1)4
A
mass 115,0 kg/m²
PENRT 916 MJ/m²
GWP total -26,5 kg CO2/m²
AP 0,257 kg SO2/m²
no. type layer d
cm		 λ
W/mK		 R
m²K/W		 ΔOI3
pts/m²
1 homogene Schichthomogene Schicht Clay roof tiles (2000 kg/m³) 2,00 ¹ ¹ ² 11
2 inhomogene Schichtinhomogene Schicht inhomogeneous (parts parallel to the eaves) 3,00      
    26 cm (87%) Vertical air layer, horizontal heat flow 25 < 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) 5,00      
    62,5 cm (93%) Vertical air layer, heat flow up 46 < d <= 50 mm 5,00 ¹ ¹ ² 0
    5 cm (7%) Timber (475 kg/m³ - e.g. spruce/fir) - rough, technically dried 5,00 ¹ ¹ ² 0
4 homogene Schichthomogene Schicht Polyethylene (PE) roof underlay - open to diffusion 0,10 0,500 0,00 ² 5
5 homogene Schichthomogene Schicht Wood fibre WF-WD (250 kg/m³) 1,80 0,057 0,32 4
6 inhomogene Schichtinhomogene Schicht inhomogeneous (parts parallel to the eaves) 12,00      
    56,5 cm (88%) Rock wool MW(SW)-WL (28 kg/m³) 12,00 0,044 2,73 9
    8 cm (12%) Timber (475 kg/m³ - e.g. spruce/fir) - planed, technically dried 12,00 0,120 1,00 0
7 inhomogene Schichtinhomogene Schicht inhomogeneous (parts normal to the eaves) 20,00      
    56,5 cm (82%) Rock wool MW(SW)-WL (28 kg/m³) 20,00 0,044 4,55 13
    12 cm (18%) Timber (475 kg/m³ - e.g. spruce/fir) - rough, technically dried 20,00 0,120 1,67 -1
8 homogene Schichthomogene Schicht External chipboard (650 kg/m³) 1,90 0,130 0,15 6
9 homogene Schichthomogene Schicht Polyethylene (PE) vapour brake 0,10 0,500 0,00 ² 3
10 inhomogene Schichtinhomogene Schicht inhomogeneous (parts parallel to the eaves) 6,00      
    62,5 cm (91%) Rock wool MW(SW)-WL (28 kg/m³) 6,00 0,044 1,36 4
    6 cm (9%) Timber (475 kg/m³ - e.g. spruce/fir) - planed, technically dried 6,00 0,120 0,50 0
11 homogene Schichthomogene Schicht Gypsum plasterboard (700 kg/m³) 1,25 0,210 0,06 3
12 homogene Schichthomogene Schicht Gypsum plasterboard (700 kg/m³) 1,25 0,210 0,06 3
    Rsi / Rse = 0,100 / 0,100  
    R' / R'' (max. relative error: 4,4%) = 8,250 / 7,553  
    building element 54,40   7,902 60
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