Rollingergrund School

  • Building Type : School, college, university
  • Construction Year : 1975
  • Delivery year : 1975
  • Address 1 - street : 239, rue du Rollingergrund L-2441 LUXEMBOURG, Luxembourg
  • Climate zone : [Cfb] Marine Mild Winter, warm summer, no dry season.

  • Net Floor Area : 1 460 m2
  • Construction/refurbishment cost : 2 670 000 €
  • Cost/m2 : 1828.77 €/m2
  • Primary energy need :
    101.8 kWhep/m2.an
    (Calculation method : RGD du 31 août 2010 - bâtiment fonctionnel )
Energy consumption
Economical buildingBuilding
< 50A
A
51 à 90B
B
91 à 150C
C
151 à 230D
D
231 à 330E
E
331 à 450F
F
> 450G
G
Energy-intensive building

See more details about this project

 http://www.arco.lu/

Data reliability

Assessor

Stakeholders

    Contractor representative

    ARCO

    Philippe Poncé , PPonce@arco.lu


    Contractor

    Ville de Luxembourg

Owner approach of sustainability

Goals:
- Energy performance comparable to that of a new construction
- maximum day light
- Optimal air quality
- Sustainable materials
- Short construction phase
The solutions :
- Removal of all damaged items and all thermal bridges
- Conservation of the basic structure as a support and mass storage for hot and cold
- Refurbishing of the thermal envelope
- Contemporary architecture combined with functional design
- Inside: bright ambience and natural materials
The existing building had a very poor energy performance. Strong reduction of the energy consumption and use of sustainable materials will enable the reduction of maintenance costs. The existing facade elements have been dismantled and immediately replaced by new insulating wooden elements partly prefabricated. This method allowed to conduct parallel work within the building and reduce construction time.

Architectural description

A new facade has been implemented to improve the building's energy performance.
Front / Wood Elements: The unsealed and poorly insulated existing concrete structure was completely coated with a new thermal envelope made of prefabricated wooden elements with cellulose insulation. The reached U value is 0.15 W / m2 K ca.
External joinery: To ensure optimal use of natural light, the classrooms were fit with glass in their entire length and height. The wood-aluminium window frames, , with ventilation opening, are equiped with a triple glazing. They reach a U value of 0.9 W / m2 K. The external automatic protection against the sun prevents overheating in summer.
Roof: The existing flat roof was insulated with mineral wool, sealed with vegetated EPDM strips. It reaches a U value of 0.11 W / m 2 K.
Ventilation: To ensure a high air quality in rooms, a central ventilation system with high heat recovery was installed. The system is concealed in the false ceiling area above the existing furniture.
Lighting: The lighting of classrooms was completely dismantled in favour of extremely efficient lights. Presence detectors and automatic response to natural light is the guarantee for an economic use.

Energy consumption

  • 101,80 kWhep/m2.an
  • 132,00 kWhep/m2.an
  • RGD du 31 août 2010 - bâtiment fonctionnel

Envelope performance

  • 0,38 W.m-2.K-1
  • Rehabilitation and compliance of the school, in order to make it more attractive and get the energy label A. Installation of walls in timber frame with thermal insulation of 36 cm cellulose. Frame with triple-glazed windows. Thermal insulation of existing concrete walls with 20 cm thick rock wool. Cladding facades and canopy with Trespa panels. Realization of a green roof with 28 cm of thermal insulation and an Alwitra waterproofing membrane.

Product

    Trespa Météon

    TRESPA

    TRESPA

    Opere strutturali / Struttura - Involucro - Finitura

    An efficient design cannot be done without efficient materials, finishing and systems. Trespa Meteon combines all these qualities.

    -

Construction and exploitation costs

  • 3 200 000

Urban environment

Rollingergrund is located in the northwest part of the city of Luxembourg and is the second largest area after Cessange. Rollingergrund is a very green area. It has many parks because of its location in the valley. Many green areas are scattered through the hills. The Bambësch forest is a part of the natural heritage. It gives Rollingergund an important place in the city of Luxembourg, because it is the central area of relaxation of the capital.

Building Environmental Quality

  • energy efficiency

Contest categories

Energie & Climats Tempérés

Energie & Climats Tempérés

Bas Carbone

Bas Carbone

Coup de Coeur des Internautes

Coup de Coeur des Internautes

Green Building Solutions Awards 2016


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    Green Building Solutions Awards 2016