On behalf of Leiden City Council, SealteQ has been carrying out repair work on the Haarlemmerstraat car park on Middelstegracht since February. The reason for this is that, during maintenance work in mid-2025, the SealteQ team discovered structural defects. The municipality decided to close the car park immediately. Since then, SealteQ has been working closely with the municipality and its consultants to find a structural and sustainable solution.
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Repair work on the Haarlemmerstraat car park in Leiden
The project involves an eight-storey split-level car park above a supermarket, with a total parking area of approximately 7,200 m². The structure consists of wide-slab floors with a reinforced compression layer and prestressed beam strips resting on cast-in-situ columns.
The repair work comprises the following elements:
- Complete removal of the existing asphalt surface
- Repair of concrete damage and structural repair of wall-floor assemblies
- Waterproofing connections to the ground floor
- Concreting floor edges for improved water management
- Installation of a cathodic protection system using titanium strip anodes, coated with conductive cement-bound mortar, to permanently prevent corrosion caused by de-icing salts
- Finishing of all floors and ramps with a multi-layer, crack-bridging and wear-resistant synthetic floor finish
The concrete repair work and the pouring of the floor edges are in full swing. At the same time, the final layers of asphalt are being removed from the upper floors. Once the concrete repair work has been completed, the cathodic protection system will be installed, after which the floor finishes will be laid.
The aim is to reopen the garage for use around the summer holidays of 2026.
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