Metal Roofs Waterproofing & Insulation
A metal roof, often referred to as a tin roof, is a roofing system made from metal pieces or tiles. It is a component of the building envelope and often used to cover large buildings because of their high strength to weight ratio.
Metal sheet roofs are very affordable, durable, and quick to install, which makes their use extremely popular in the construction of commercial and industrial buildings. The major problem with metal roofs in warm weather is that they absorb and retain enormous quantities of heat. In non-air-conditioned buildings, this translates directly into high building envelope heat loads, temperature and moisture build-up. In air-conditioned buildings, it means higher energy costs as the air-conditioning has to fight the heat that builds up during the day, even when the sky is overcast (ultraviolet rays, the major source of heat from solar radiation, will penetrate clouds). Because buildings with metal roofs are hotter than the things around them, they contribute to the urban heat island effect. A metal sheet roof in tropical countries, for example, can reach a temperature above 75 °C / 167 °F. and the second major problem is the leakage through out the seams and joints will cause serious deterioration, rust, corrosion and severe structural damage.
Therefore care must be taken with all metal roof products by using many different types of coatings & Insulation methods such as :
• Spray polyurethane Foam
• Polyurethane Liquid UV resistant
• Acrylic Coating