Water tightness of external walls is usually achieved by using suitable materials, providing adequate wall thickness, designing proper construction details, as well as providing surface rendering and skim coat which serves as a barrier against water ingress. Where external walls are exposed to severe weather conditions, more extensive surface waterproofing should be applied.
Different types of external floors required different materials to install, which able to stand on extreme temperature, humidity, and rain. Although the technical aspects are fundamental, we also have to find a floor that visually pleases us.
