Malaysia being in the tropics is a country with high humidity. As a result, moss and mold are not uncommon and they lead to degradation. A colleague who recently bought a sprawling property in the country engaged a Mold Company to perform mold testing on his property. A Mold Inspector was deployed to gather facts. He even brought a Mold Dog. Why dogs you may ask.
Dogs have been trusted for hundreds of years to detect and locate things humans can't find. Once this four-legged mold detective locates the area that needs further investigation, industry-standard testing and investigative methods are then used to confirm the findings. All this is professionally done and the method is proven, accurate and trusted.