Grand-Ducal Regulation amending the energy performance of buildings (2008)

U values for thermal envelope W/(m2k):

 

walls:

• external: 0.32
• very little heated premises: 0.50
• surfaces in contact with the ground or not heated premises: 0.40

roofs:

• external: 0.25
• very little heated premises: 0.35
• surfaces in contact with the ground or not heated premises: 0.30

windows:

• external: 1.5
• very little heated premises: 2.0
• surfaces in contact with the ground or not heated premises: 2.0

doors:

• external: 2.0
• very little heated premises: 2.50
• surfaces in contact with the ground or not heated premises: 2.5

Skylight:

• external: 2.7
• very little heated premises: 2.7

surfaces in contact with the ground or not heated premises: 2.7