<https://www.stateroofing.com/blog/roofing/the-characteristics-of-different-types-of-metal-roofing/#breadcrumb>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.stateroofing.com/blog/roofing/the-characteristics-of-different-types-of-metal-roofing/>