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Table1. Maximum U-values for building components Umax in W/(m²K).

To

2008

Building component

Wall and floor

Roof and ceiling

Window or balcony door including frame

Door including frame

1996

Building component

Outdoor walls

Windows and doors

Ridged/flat roof and attic Foundation, Cellar

outdoor air

0,32 0,25 1,5 2,0

To outdoor air

0,40 2,00 0,30 0,40

To weakly heated spaces

0,50 0,35 2,0 2,5

0,40 0,30 2,0 2,5

To soil or unheated spaces

0,40 3,00 0,40 0,50

As a first step, the legal process for the implementation of the EPBD in residential buildings was achieved, the regulation of 1995 came into force, with stricter U-values, for all non residential buildings until the EPBD is transposed into a national regulation for these non residential types of buildings. These stricter U-values have been legally implemented with the regulation on energy performance in residential buildings and came into force on 1st January 2008.

2 > Status of the implementation

Introduction

The "règlement grand-ducal du 21 novembre 2007 concernant la performance énergétique des bâtiments d'habitation" (Grand-Ducal regulation concerning the energy performance in residential buildings) was published in the national official journal “Memorial A 221” of the 14th December 2007 and came into force on January 1, 2008.

The new regulation implements › a methodology to calculate the energy performance of new residential buildings;

› a methodology to calculate the energy performance of existing residential buildings if they are subject to major modifications or extensions;

› an energy performance certificate.

Legal obligations

Each time a building permit (new buildings and refurbishment of existing building) is required the documents providing the calculation of the requested energy performance standards and the energy performance certificate must be attached to the application. The obligation to provide the required documents arises from the legal requirement to submit a request for a building permit, and depending on the municipal rules includes all modifications and extensions to residential buildings.

These calculations have to be carried out by architects, technical engineers and/or accreditated experts who have completed a specific training course.

EPBD Buildings Platform > P119_EN_Luxembourg_Sept 2008

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