Covering an area of over 8 ha, the new Hap Seng Business Park in Shah Alam, Malaysia, accommodates different building types and sizes to meet the needs of various industries and functions. These include an over 46,000 sq m flatted warehouse, which is the largest building in the complex, as well as semi-detached and detached types. The basement carpark occupies the entire site with more than 900 parking bays.
Completed in 2020, this new industrial development is owned by Hap Seng Land Sdn Bhd. The architect for the project was Asima Architects Sdn Bhd, while the contractor was Nakano Construction Sdn Bhd. Mapei was engaged to provide waterproofing solutions for the driveway and basement carpark.
At the basement carpark, Mapei’s Idrostop waterbars and Idrostop SW waterstops were used for sealing the construction joints in the basement slab and retaining wall. The Mapelastic Foundation waterproofing membrane and Polyfond Kit Drain were installed on the retaining wall, while the Idrocrete WP waterproofing admixture helped to enhance the concrete quality of the basement slab and wall.
The driveway was waterproofed with Mapelastic Smart, a two-component, high-flexibility cementitious mortar, and Mapetex Sel, a non-woven, macro-holed polypropylene fabric designed for reinforcing waterproofing membranes. The Mapefoil DPM 250 separation sheet was overlaid prior to installation of the topping concrete.
For the drains along the driveway, Mapei’s Primer SN was deployed as the priming layer and broadcast with Quartz 30/60 sand. The Purtop 1000 membrane (3-mm-thick) was selected as the waterproofing layer due to its long term durability, toughness and ability to withstand direct exposure to hydraulic abrasion.
The Kerapoxy epoxy grout was then applied on the Purtop 1000 membrane and broadcast with quartz sand to form the adhesion surface for Mapelastic Smart and Mapetex Sel at the overlap area.
The Mapei waterproofing systems in this project were supplied by Mapei Malaysia. The installation work was carried out between 2018 and 2020 by subcontractor Monarch CC Sdn Bhd.