Thermal transmittance U-value
LIGNATUR elements can be used in pitched roof as well as flat roof constructions. With sloping roofs the elements span from gable wall to gable wall or conventionally from eaves to ridge. LIGNATUR elements are ideal for widely spanned flat roof structures with perfect thermal properties. For projecting roofs or balconies we offer developed solutions without thermal bridges.
On the following pages we have calculated some structural-physical values for various element heights and insulation thicknesses.
Thermal transmittance U-value (W/(m²K)
Calculation of the thermal transmittance is based on the numeric method according to EN ISO 10211 and EN ISO 10077-2.
- heat transmission resistance at the inner surface Rsi = 0.13 m2K/W
- heat transmission resistance at the outer surface Rse = 0.04 m2K/W
The installation of insulation in the LIGNATUR element is not recommended. If insulation is required in the element due to the limited space, a special certificate from a specialist is required.
Surface element (LFE)
Heat conductivity:
- coniferous wood λ = 0.130 W/(mK)
- polyurethane λ = 0.030 W/(mK)
Calculated heat conductivity of the still air in the LIGNATUR element according to EN ISO 10077-2
- coniferous wood λ = 0.130 W/(mK)
- polyurethane λ = 0.030 W/(mK)
Calculated heat conductivity of the still air in the LIGNATUR element according to EN ISO 10077-2
- coniferous wood λ = 0.130 W/(mK)
- polyurethane λ = 0.030 W/(mK)
Calculated heat conductivity of the still air in the LIGNATUR element according to EN ISO 10077-2
- coniferous wood λ = 0.130 W/(mK)
- polyurethane λ = 0.030 W/(mK)
Calculated heat conductivity of the still air in the LIGNATUR element according to EN ISO 10077-2
- coniferous wood λ = 0.130 W/(mK)
- polyurethane λ = 0.030 W/(mK)
Calculated heat conductivity of the still air in the LIGNATUR element according to EN ISO 10077-2
- coniferous wood λ = 0.130 W/(mK)
- polyurethane λ = 0.030 W/(mK)
Calculated heat conductivity of the still air in the LIGNATUR element according to EN ISO 10077-2
- coniferous wood λ = 0.130 W/(mK)
- polyurethane λ = 0.030 W/(mK)
Calculated heat conductivity of the still air in the LIGNATUR element according to EN ISO 10077-2
- coniferous wood λ = 0.130 W/(mK)
- polyurethane λ = 0.030 W/(mK)
Calculated heat conductivity of the still air in the LIGNATUR element according to EN ISO 10077-2
- coniferous wood λ = 0.130 W/(mK)
- polyurethane λ = 0.030 W/(mK)
Calculated heat conductivity of the still air in the LIGNATUR element according to EN ISO 10077-2
- coniferous wood λ = 0.130 W/(mK)
- polyurethane λ = 0.030 W/(mK)
Calculated heat conductivity of the still air in the LIGNATUR element according to EN ISO 10077-2
LFE (mineral fibre)
Heat conductivity:
- coniferous wood λ = 0.130 W/(mK)
- mineral fibre λ = 0.035 W/(mK)
- polyurethane λ = 0.030 W/(mK)
- coniferous wood λ = 0.130 W/(mK)
- mineral fibre λ = 0.035 W/(mK)
- polyurethane λ = 0.030 W/(mK)
- coniferous wood λ = 0.130 W/(mK)
- mineral fibre λ = 0.035 W/(mK)
- polyurethane λ = 0.030 W/(mK)
- coniferous wood λ = 0.130 W/(mK)
- mineral fibre λ = 0.035 W/(mK)
- polyurethane λ = 0.030 W/(mK)
- coniferous wood λ = 0.130 W/(mK)
- mineral fibre λ = 0.035 W/(mK)
- polyurethane λ = 0.030 W/(mK)
- coniferous wood λ = 0.130 W/(mK)
- mineral fibre λ = 0.035 W/(mK)
- polyurethane λ = 0.030 W/(mK)
- coniferous wood λ = 0.130 W/(mK)
- mineral fibre λ = 0.035 W/(mK)
- polyurethane λ = 0.030 W/(mK)
- coniferous wood λ = 0.130 W/(mK)
- mineral fibre λ = 0.035 W/(mK)
- polyurethane λ = 0.030 W/(mK)
- coniferous wood λ = 0.130 W/(mK)
- mineral fibre λ = 0.035 W/(mK)
- polyurethane λ = 0.030 W/(mK)
- coniferous wood λ = 0.130 W/(mK)
- mineral fibre λ = 0.035 W/(mK)
- polyurethane λ = 0.030 W/(mK)
LFE (wood fibre)
Heat conductivity:
- coniferous wood λ = 0.130 W/(mK)
- wood fibre λ = 0.040 W/(mK)
- coniferous wood λ = 0.130 W/(mK)
- wood fibre λ = 0.040 W/(mK)
- coniferous wood λ = 0.130 W/(mK)
- wood fibre λ = 0.040 W/(mK)
- coniferous wood λ = 0.130 W/(mK)
- wood fibre λ = 0.040 W/(mK)
- coniferous wood λ = 0.130 W/(mK)
- wood fibre λ = 0.040 W/(mK)
- coniferous wood λ = 0.130 W/(mK)
- wood fibre λ = 0.040 W/(mK)
- coniferous wood λ = 0.130 W/(mK)
- wood fibre λ = 0.040 W/(mK)
- coniferous wood λ = 0.130 W/(mK)
- wood fibre λ = 0.040 W/(mK)
- coniferous wood λ = 0.130 W/(mK)
- wood fibre λ = 0.040 W/(mK)
- coniferous wood λ = 0.130 W/(mK)
- wood fibre λ = 0.040 W/(mK)
LFE (Absorber 40)
Heat conductivity:
- coniferous wood λ = 0.130 W/(mK)
- wood fibre λ = 0.040 W/(mK)
- hAbsorber = 40 mm
- polyurethane λ = 0.030 W/(mK)
Calculated heat conductivity of the still air in the LIGNATUR element according to EN ISO 10077-2
- coniferous wood λ = 0.130 W/(mK)
- wood fibre λ = 0.040 W/(mK)
- hAbsorber = 40 mm
- polyurethane λ = 0.030 W/(mK)
Calculated heat conductivity of the still air in the LIGNATUR element according to EN ISO 10077-2
- coniferous wood λ = 0.130 W/(mK)
- wood fibre λ = 0.040 W/(mK)
- hAbsorber = 40 mm
- polyurethane λ = 0.030 W/(mK)
Calculated heat conductivity of the still air in the LIGNATUR element according to EN ISO 10077-2
- coniferous wood λ = 0.130 W/(mK)
- wood fibre λ = 0.040 W/(mK)
- hAbsorber = 40 mm
- polyurethane λ = 0.030 W/(mK)
Calculated heat conductivity of the still air in the LIGNATUR element according to EN ISO 10077-2
- coniferous wood λ = 0.130 W/(mK)
- wood fibre λ = 0.040 W/(mK)
- hAbsorber = 40 mm
- polyurethane λ = 0.030 W/(mK)
Calculated heat conductivity of the still air in the LIGNATUR element according to EN ISO 10077-2
- coniferous wood λ = 0.130 W/(mK)
- wood fibre λ = 0.040 W/(mK)
- hAbsorber = 40 mm
- polyurethane λ = 0.030 W/(mK)
Calculated heat conductivity of the still air in the LIGNATUR element according to EN ISO 10077-2
- coniferous wood λ = 0.130 W/(mK)
- wood fibre λ = 0.040 W/(mK)
- hAbsorber = 40 mm
- polyurethane λ = 0.030 W/(mK)
Calculated heat conductivity of the still air in the LIGNATUR element according to EN ISO 10077-2
- coniferous wood λ = 0.130 W/(mK)
- wood fibre λ = 0.040 W/(mK)
- hAbsorber = 40 mm
- polyurethane λ = 0.030 W/(mK)
Calculated heat conductivity of the still air in the LIGNATUR element according to EN ISO 10077-2
- coniferous wood λ = 0.130 W/(mK)
- wood fibre λ = 0.040 W/(mK)
- hAbsorber = 40 mm
- polyurethane λ = 0.030 W/(mK)
Calculated heat conductivity of the still air in the LIGNATUR element according to EN ISO 10077-2
- coniferous wood λ = 0.130 W/(mK)
- wood fibre λ = 0.040 W/(mK)
- hAbsorber = 40 mm
- polyurethane λ = 0.030 W/(mK)
Calculated heat conductivity of the still air in the LIGNATUR element according to EN ISO 10077-2
LFE (Absorber 60)
Heat conductivity:
- coniferous wood λ = 0.130 W/(mK)
- wood fibre λ = 0.040 W/(mK)
- hAbsorber = 60 mm
- polyurethane λ = 0.030 W/(mK)
- coniferous wood λ = 0.130 W/(mK)
- wood fibre λ = 0.040 W/(mK)
- hAbsorber = 60 mm
- polyurethane λ = 0.030 W/(mK)
- coniferous wood λ = 0.130 W/(mK)
- wood fibre λ = 0.040 W/(mK)
- hAbsorber = 60 mm
- polyurethane λ = 0.030 W/(mK)
- coniferous wood λ = 0.130 W/(mK)
- wood fibre λ = 0.040 W/(mK)
- hAbsorber = 60 mm
- polyurethane λ = 0.030 W/(mK)
- coniferous wood λ = 0.130 W/(mK)
- wood fibre λ = 0.040 W/(mK)
- hAbsorber = 60 mm
- polyurethane λ = 0.030 W/(mK)
- coniferous wood λ = 0.130 W/(mK)
- wood fibre λ = 0.040 W/(mK)
- hAbsorber = 60 mm
- polyurethane λ = 0.030 W/(mK)
- coniferous wood λ = 0.130 W/(mK)
- wood fibre λ = 0.040 W/(mK)
- hAbsorber = 60 mm
- polyurethane λ = 0.030 W/(mK)
- coniferous wood λ = 0.130 W/(mK)
- wood fibre λ = 0.040 W/(mK)
- hAbsorber = 60 mm
- polyurethane λ = 0.030 W/(mK)
- coniferous wood λ = 0.130 W/(mK)
- wood fibre λ = 0.040 W/(mK)
- hAbsorber = 60 mm
- polyurethane λ = 0.030 W/(mK)
- coniferous wood λ = 0.130 W/(mK)
- wood fibre λ = 0.040 W/(mK)
- hAbsorber = 60 mm
- polyurethane λ = 0.030 W/(mK)
Box element (LKE)
Heat conductivity:
- coniferous wood λ = 0.130 W/(mK)
- polyurethane λ = 0.030 W/(mK)
Calculated heat conductivity of the still air in the LIGNATUR element according to EN ISO 10077-2
- coniferous wood λ = 0.130 W/(mK)
- polyurethane λ = 0.030 W/(mK)
Calculated heat conductivity of the still air in the LIGNATUR element according to EN ISO 10077-2
- coniferous wood λ = 0.130 W/(mK)
- polyurethane λ = 0.030 W/(mK)
Calculated heat conductivity of the still air in the LIGNATUR element according to EN ISO 10077-2
- coniferous wood λ = 0.130 W/(mK)
- polyurethane λ = 0.030 W/(mK)
Calculated heat conductivity of the still air in the LIGNATUR element according to EN ISO 10077-2
- coniferous wood λ = 0.130 W/(mK)
- polyurethane λ = 0.030 W/(mK)
Calculated heat conductivity of the still air in the LIGNATUR element according to EN ISO 10077-2
- coniferous wood λ = 0.130 W/(mK)
- polyurethane λ = 0.030 W/(mK)
Calculated heat conductivity of the still air in the LIGNATUR element according to EN ISO 10077-2
- coniferous wood λ = 0.130 W/(mK)
- polyurethane λ = 0.030 W/(mK)
Calculated heat conductivity of the still air in the LIGNATUR element according to EN ISO 10077-2
- coniferous wood λ = 0.130 W/(mK)
- polyurethane λ = 0.030 W/(mK)
Calculated heat conductivity of the still air in the LIGNATUR element according to EN ISO 10077-2
- coniferous wood λ = 0.130 W/(mK)
- polyurethane λ = 0.030 W/(mK)
Calculated heat conductivity of the still air in the LIGNATUR element according to EN ISO 10077-2
LKE (wood fibre)
Heat conductivity:
- coniferous wood λ = 0.130 W/(mK)
- wood fibre λ = 0.040 W/(mK)
* calculation with joint insulation
- coniferous wood λ = 0.130 W/(mK)
- wood fibre λ = 0.040 W/(mK)
* calculation with joint insulation
- coniferous wood λ = 0.130 W/(mK)
- wood fibre λ = 0.040 W/(mK)
* calculation with joint insulation
- coniferous wood λ = 0.130 W/(mK)
- wood fibre λ = 0.040 W/(mK)
* calculation with joint insulation
- coniferous wood λ = 0.130 W/(mK)
- wood fibre λ = 0.040 W/(mK)
* calculation with joint insulation
- coniferous wood λ = 0.130 W/(mK)
- wood fibre λ = 0.040 W/(mK)
* calculation with joint insulation
- coniferous wood λ = 0.130 W/(mK)
- wood fibre λ = 0.040 W/(mK)
* calculation with joint insulation
- coniferous wood λ = 0.130 W/(mK)
- wood fibre λ = 0.040 W/(mK)
* calculation with joint insulation
- coniferous wood λ = 0.130 W/(mK)
- wood fibre λ = 0.040 W/(mK)
* calculation with joint insulation
