The price of condo units at higher floor tend to be higher compared with the lower floor units as most higher floor units command better view. In most cases, the bigger units such as duplex or penthouse are also purposely designed to situate at the top most few floors. It is important to note the type of roof of the building when one is buying a unit at the top most floor, one should check if the roof is a tiled roof or concrete flat roof. Both types of roof if constructed properly would not pose any problem to the dweller of the top most floor.

However, there is one scenario where reinforced concrete roof can pose a problem. I had the opportunity to observe a case where the roof of a duplex unit is a reinforced concrete flat roof and the concrete roof also serve as the compound for the penthouse at the floor above. The subject building was designed with staggered height whereby the middle section is two floor higher to accommodate the penthouse at middle section with the duplex at the lower section at the side. With the reinforced concrete flat roof of duplex serving as the compound of the penthouse sound like wonderful idea but the problem surfaced when the owner of the penthouse decided to renovate his compound by putting on beautiful tiles. In the process of putting on the tiles, certain hacking would have to be carried out and unknowingly the waterproofing material to prevent seepage of water through the reinforced concrete roof is damaged.

After completion of the tile laying, the penthouse owner has a beautiful compound but the duplex owner begin to suffer as the reinforced concrete roof started to have seepage during rain as the waterproofing is now not perfect and rain water starts to seep through the roof, the seepage may not be serious enough to cause a leaking roof but the roof will most of the time be wet because of the continuous seepage. Practically water is retained in the reinforced concrete roof until a prolonged dry season dry the roof. The seepage cause not only the roof to be wet but also the walls as water will find its way downward due to gravity flow. With the wet roof and walls, paint start to peel off and fungus developed. However one may say that any defect to building can be rectified but the problem highlighted above is more complicated as the roof which serve as the compound of the penthouse cannot be accessed other than going through the door of the penthouse. The owner of the penthouse does not suffer any ill effect out of his renovation and therefore will not allow anyone to enter his house for any rectification works.

For the owner of the duplex below, the leaking problem could only be rectified at the floor above, the management couldn’t do much as the compound is part of the penthouse and considered as private property. The owner of the duplex can resort to legal recourse to compel the owner of the penthouse to carry out the rectification works but that would be time consuming. Therefore if one is buying a condo with reinforced concrete flat roof above, make very sure that the roof is part of the common properties where the management can gain access to the roof if there is any damage to the waterproofing system.