A concrete transfer slab at Promenade Peak, a 63-storey condominium development in River Valley, Singapore, has been found to fall short of quality standards and is currently being dismantled and replaced. The decision to rectify the slab was made after internal inspections revealed that it did not meet the stringent criteria established for the project.
Concrete transfer slabs serve a critical structural function by redistributing loads between floors where column or wall alignments differ, commonly in buildings where residential units are stacked above a podium or carpark. In this case, the slab’s deficiencies were detected during routine quality assurance checks following the completion of concreting works.
Allgreen Properties, the project developer, disclosed the issue in a construction update to buyers in May. Tho Leong Chye, managing director of Allgreen Properties, said the developer and main contractor Woh Hup jointly carried out regular assessments that identified the concerns. After evaluating various options, they chose to replace the entire slab to uphold the building’s structural integrity. The dismantling and reconstruction began around late May and are expected to continue for several months.
A spokesperson for Promenade Peak confirmed that the rectification work has been factored into a revised timeline. Although the original target was set for Q1 2030, the developer now anticipates completing the project by Q2 2030. The spokesperson also noted that the costs associated with dismantling and reinstating the slab are being borne by the contractor, with no additional charges passed to home buyers.
Promenade Peak, which comprises 596 units and is approximately 70 percent sold, is set to become the world’s tallest prefabricated prefinshed volumetric construction (PPVC) residential building. PPVC involves manufacturing three-dimensional modules, such as bathrooms, off-site before assembling them on-site. The development will also feature Singapore’s highest infinity pool.
The Building and Construction Authority (BCA) stated that issues involving concrete transfer slabs are uncommon. Upon being alerted to the slab’s quality concerns, the project parties conducted further testing and engineering assessments, subsequently notifying the BCA. The agency reviewed and approved the rectification measures and is closely monitoring the progress to ensure compliance with safety standards.
Singapore’s regulatory framework requires construction work to be supervised by qualified personnel throughout the building process, with tests conducted by accredited laboratories to verify adherence to approved plans. The BCA commended Promenade Peak’s stakeholders for promptly identifying and addressing the issue.
Independent construction expert Jason Tan, managing principal of Tresca Consult, explained that if a concrete transfer slab does not meet design specifications in materials or workmanship, remedial work is necessary to maintain structural safety. He cautioned that such demolition and reconstruction efforts can be time-intensive depending on the volume and methods involved.
Units at Promenade Peak are priced between S$1.4 million and S$6.6 million and range from one-bedroom to five-bedroom configurations. The development includes 80 one-bedroom, 320 two-bedroom, 118 three-bedroom, 57 four-bedroom, and 19 five-bedroom units, along with two penthouses on the 63rd floor measuring 4,144 square feet each.