02 bestaande situatie voorgevel

Facade renovation at Plantin en Moretuslei 155

Energy-efficiency upgrade of the building envelope of the block of flats on Plantin en Moretuslei.
  • Architect: Bureau Bouwtechniek

  • Client: VME Plantin en Moretuslei 155

  • Timing: 2018 -

  • Status: In execution

  • Advisors: BB (EPB & safety coordination)

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Renovation strategy

The apartment block on the corner of Plantin en Moretuslei and Bouwensstraat dates from the late 1960s. The existing façade consists of concrete panels suspended from a concrete supporting structure, with a limited cavity.

An initial assessment by Bureau Bouwtechniek had already revealed various signs of damage as early as 2017, including damaged joints, localised corrosion and concrete damage to the façade and terraces. Furthermore, a number of original construction details resulted in inadequate drainage of infiltrating water, allowing moisture to damage the concrete structure.

What began as a request to repair the damage therefore evolved into a broader renovation strategy. Rather than simply repairing the affected parts, the building envelope is being upgraded to improve energy efficiency, and the façade and terraces are being comprehensively addressed. The building’s existing volume and articulation will be retained.

Our brief

Bureau Bouwtechniek is responsible for a comprehensive architectural brief for the energy-efficient façade renovation, from design through to supervision of the works.


  • preliminary design
  • application for planning permission
  • construction design including plans, specifications and bills of quantities
  • coordination of specialist studiestranslation of the various technical constraints into a feasible façade concept
  • supervision of the tendering process and monitoring of the works

A key part of our brief lies in the technical detailing of the new façade.

The existing concrete panels will be replaced by an insulated, ventilated façade featuring light beige ceramic façade panels.

The connections at windows, terraces and corners will be technically developed, with particular attention paid to the fixing, joint spacing, waterproofing and the solid appearance of the new façade cladding.

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Plan of action

The current renovation builds on an earlier damage analysis and renovation strategy by Bureau Bouwtechniek. A conscious decision was made to look beyond localised concrete repairs and to link the technical defects to a sustainable, energy-efficient improvement of the entire building envelope.

The façade renovation is approached as a single integrated project in which damage repair, energy efficiency improvements, architecture and technical feasibility come together.

  • The existing concrete cladding will be replaced by a new insulated façade envelope with a ventilated finish comprising ceramic façade panels. In doing so, we will retain the building’s existing volume and articulation.
  • The terraces will also be renovated: the superstructure will be renewed and insulated, and the concrete terraces will be given new edging. Parapets, joinery, plinths and end walls will be incorporated into the overall design.

In particular, the detailing requires special attention. The connections between the façade panels and the windows and terraces, the substructure and fixing of the panels, the joints, insulation and the coordination with structural stability and energy performance requirements are all developed as a single, integrated whole.

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TAGS: Façade| EPB| Energy renovation| audits