To ensure continuous accessibility for the hospital, the project was divided into three phases.

Lot 1: Renewal and waterproofing of the embankment

The access to the main entrance of ZNA Middelheim, located on an embankment, was suffering from structural damage caused by water infiltration. A complete reconstruction of the roadway, including improved waterproofing and insulation, with a focus on sustainability and ease of use, presented itself.

During the preliminary study, the plan of requirements was modified. The new roof structure, the larger dimensions of electric buses, and the additional weight of the fleet of vehicles made it impossible for bus traffic to still travel via the embankment. Passenger cars (up to 3.5 tonnes), however, remained allowed. This led to a rearrangement of the embankment, with the development of a multifunctional roof following the protocol of climate roofs.

Utility roof (RED): A one-way driving lane with a ‘Kiss & Ride’ zone and access to car park P1. Walking zones connect Lindendreef and the car park with the main entrance.
Green roof (GREEN):
A green buffer separates the carriageway and walking zone. This buffer acts as rainwater collection and infiltration, with controlled discharge to a central pond in case of heavy rainfall. Low-maintenance planting was chosen to withstand prolonged droughts without permanent irrigation.

In addition, insulation was installed according to modern standards, using pressure-resistant cellular glass insulation with an integrated slope layer. This ensures efficient rainwater drainage through the central drains.

The works took place in three phases to ensure accessibility for visitors and staff.

Lot 2: Concrete repair under the embankment

Below the embankment are offices, bicycle sheds and former medical wards. Extensive concrete repairs, including cathodic protection, extend the life of the structure. Finishes varied by function: aesthetic coatings in bicycle sheds and functional adjustments in staff rooms.

Lot 3: Renovation of bicycle shed

The bicycle parking area received a complete redesign with a focus on safety and ease of use. Major improvements include a new badge control system, charging points for electric bikes, and a new floor for better accessibility. Thanks to new fire detection and lighting, the bicycle shed is not only safer, but also more pleasant to use.

Choice Middelheim ZAS 5 2 25 569 A5719 Groot

Choice Middelheim ZAS 5 2 25 569 A5714 Groot

Choice Middelheim ZAS 5 2 25 569 A5727 Groot

Choice Middelheim ZAS 5 2 25 569 A5827 Groot

Choice Middelheim ZAS 5 2 25 569 A5740 Groot

Choice Middelheim ZAS 5 2 25 569 A5733 Groot 1

Choice Middelheim ZAS 5 2 25 569 A5815 Groot

Choice Middelheim ZAS 5 2 25 569 A5775 Groot

Choice Middelheim ZAS 5 2 25 569 A5770 Groot

Choice Middelheim ZAS 5 2 25 569 A5755 Groot

Choice Middelheim ZAS 5 2 25 569 A5733 Groot

Choice Middelheim ZAS 5 2 25 569 A5802 Groot

Highlights

Green roof: Low-maintenance vegetation for water collection and climate buffering.
Phasing: Smart implementation in three phases to avoid disrupting hospital activities.
Innovation: Sustainable solutions such as cathodic protection and use of pressure-resistant insulation.