The environmental impact of roofing is something a metal-roof-contractor can help manage. Metal is one of the most sustainable roofing materials because it is often made from recycled content and is 100% recyclable at the end of its life. A contractor can guide you on selecting materials with high Solar Reflectance Index (SRI) values, which help mitigate the urban heat island effect. ... https://kkroofspecialist.com.sg/metal-roof-contractor/