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Brussels Expo - Palaces 8, 9, patio and 12

On behalf of Brussels Expo, we handled the roof renovations of the flat roofs of palaces 8, 9, patio and 12.
  • Client: Brussels Expo

  • Surface: 21.000 m²

  • Budget: Palace 8, 9 and patio: €685,000 I Palace 12: €685,000

  • Timing: Palace 8, 9 and patio: September 2016 (study) - April 2017 I Palace 12: March 2017 (study) - November 2017

  • Status: Executed

The former grand expo halls of the World's Fair on the Heysel site in Brussels were built in 1935 by architect/engineer Joseph Van Neck. They underwent an extension in the 1940s and in 1958 for the World Expo. Palaces 8, 9 and patio date from 1957, while palace 12 dates from 1989.

The main buildings are partially listed and consist of a monolithic concrete skeleton with infill brickwork and are clad in natural stone cladding and copper eaves. The original external joinery consists of slender rolled steel sections.

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Study and design

  • Evaluation of the existing condition based on site surveys
  • Study of the roof details depending on the feasibility of the concept options, including study of the roof lights
  • Evaluation of the possible additional weight on the respective roofs based on the current roof sealing weight, consultation with Aib-Vinçotte, review of existing plans.
  • Building physics study: review and advice on the insulation thicknesses to be used within the framework of the current regulations, the 2017, 2020 regulations. Review of the need for a vapour barrier, type of insulation material and type of roof waterproofing.
  • Synthesis: 4 concept options (material use, fixing method, thickness etc. ) with +/- evaluation and budget implications, impact on hall use, use during renovation and suspensions.
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Tender dossier

  • On the basis of the draft option retained by Brussels Expo, drafting of the technical and administrative specifications, detailed drawings, detailed bill of quantities and summary bill of quantities (tender form).
  • Price comparison and negotiation of the tender in consultation with Brussels Expo.
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Construction site

  • Technical control of the execution of the works.
  • leading the weekly worksite meeting (technical, cost, organisational, etc.)
  • technical control of the smooth running of the works
  • reporting.
  • Assisting with provisional and final acceptance.

Meet our project team

From Team Renovation, Restoration & Maintenance (3)

prof. arch. Jan Moens

General Director
Head of Research & Development Department
Managing Director
E-mail |
Johan 3224

prof. arch. Johan Cordonnier

Project architect
Expert construction details
Façade advisor
E-mail |
B B Ken Koolsaet 7293 Large

Ken Coolsaet

Adviseur platte daken
E-mail |

From Team Safety (1)

B B Barbara Arts 8055 Large

arch. Barbara Arts

Project architect
Safety coordinator
E-mail |
TAGS: Roof