I think the contractor is referring to hillpark maple phase which use pre-cast wall with panasonic technology. All other phases should be using conventional brick. Meranti one is using AAC block (autoclaved aerated concrete) as shown by member of meranti phase. I personal think it seems not easy to renovate for hillpark maple since it is pre-cast wall, maybe they need new method to renovate.

My friends in renovation industry, he told me nowadays hard to find quality main con despite the project is from prestigious developers. The market is short of good quality main con coz too many projects launched in recent years. What we hope is the house built with less defect or not serious defect. My friend built his own land into bangalow with cost more than a million (construction cost only), everything using premium material but still water leaking and some cracking on wall. Sigh