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Regional validity

Scope

exposed rafter
Cross-section of standard configuration

exposed rafter
Standard configuration

Note

The design of the under-roof construction and of the counter-battens have to be specified according to the roof pitch and the national requirements.

Register of building materials used for this application, cross-section (from top to bottom)

Thickness [mm] Building material Thermal performance Reaction to fire­
λ μ min – max ρ c
A concrete roof tile or tiled roof 2100 A1
B 30,0 spruce wood battens (30/50) 0,120 50 450 1,600 D
C 50,0 spruce wood counter battens (Austria: minimum height 50 mm), Germany 30 mm 0,120 50 450 1,600 D
D 22,0 softboard [045; 250] - rigid underlay 0,045 5 250 2,100 E
E - variable insulation material - insulation placed on top of the rafters
F vapour barrier sd≥ 1m 1000
G 40,0 spruce wood tongue and groove, fire protection cladding (Germany minimum 50 mm) 0,120 50 450 1,600 D
H construction timber in acc. with structural design 0,120 50 450 1,600 D

Variations of building components

Thickness of layer Fire performance Thermal performance Acoustic performance Eco Sustainability Mass
Thickness [mm] Building material Σ REI U [W/(m²K)] Diffusion Rw (C,Ctr) ΔOI3 m [kg/m²]
sdshzx01-00 E 180,0 mineral wool [040; 180; ≥1000°C] 322,0 30 0,18 adequate 42 (-3,-8) 93,78 121,9
sdshzx01-01 E 180,0 wood-fibre insulation board [0,040; R=200] 322,0 30 0,18 adequate 42 (-3,-8) 43,48 125,5
sdshzx01-02 E 260,0 mineral wool [040; 180; ≥1000°C] 402,0 30 0,13 adequate 44 (-3,-8) 128,79 72,4
sdshzx01-03 E 260,0 wood-fibre insulation board [0,040; R=200] 402,0 30 0,13 adequate 44 (-2,-8) 56,14 77,6
sdshzx01-04 E 240,0 mineral wool [040; 180; ≥1000°C] 382,0 30 0,14 adequate 44 (-3,-8) 120,04 132,7
sdshzx01-05 E 240,0 wood-fibre insulation board [0,040; R=200] 382,0 30 0,14 adequate 44 (-3,-8) 52,97 137,5

Last update 07.05.2020/hfa.plb