Galvalume which is an iron-based material with a layer of aluminum and zinc. Because it is made of iron, galvalume is very suitable to be used as a structural material, especially as a sturdy and strong roof truss. Harijaya Insulation Surabaya Sell Galvalume which serves as an outdoor roofing material, gutters, fences and other needs, including large buildings or residential houses. In addition, termites are the number 1 enemy of wood. There have been frequent cases of roof collapse due to termites eating the wooden roof truss. This will not happen if your roof frame uses galvalume material. Galvalume which Harijaya Insulation sells is also not like wood which if exposed to fire will turn into charcoal (crushed) , Galvalume has properties that are more resistant to fire so as to minimize the risk of collapse due to fire. In addition to selling Galvalume, Harijaya Insulation Surabaya also provides Jacketing Steam insulation services in Chiller Steam Pipes.