Durability problem is a usual shortcoming of utilizing timber as a construction material. After exposed to the weather in decades, the historic timber building often experienced a severe deterioration process. Amantubillah Palace, as Mempawah Sultanate’s inheritance, also suffers from this process. The repair and replacement action are needed to preserve this legacy from the past. Thus, it is essential to know the remaining service life of the building. The calculations of decay depth were carried out by utilizing the Australian CSIRO model incorporating the parameters which are related to the Indonesian tropical climate. From the calculations, it is obtained that the decaying process will reach the centre of the cross-section in 83 years. It is recommended that repair or replacement action should be taken immediately.

耐久性问题是利用木材作为建筑材料的常见缺点。历经数十年的风雨，这座历史悠久的木结构建筑经常经历严重的老化过程。Amantubillah Palace，作为Mempawah Sultanate的继承者，也经历了这个过程。需要采取维修和更换行动来保护过去的这一遗产。因此，了解建筑物的剩余使用寿命至关重要。衰减深度的计算是利用澳大利亚 CSIRO 模型进行的，该模型结合了与印度尼西亚热带气候相关的参数。计算得出，衰变过程将在83年后到达截面中心。建议立即采取维修或更换措施。