Following North Korea's nuclear test in October 2006, Security Council members imposed sanctions on Pyongyang. The targeted sanctions include an embargo on military and technological materials and luxury goods, as well as a set of financial sanctions.
PVC roofing system. This roofing system is highly reflective and very durable. PVC is one of the top flat roof options because it is easy to install and lacks water permeability, meaning it can resist water ponding. Itâs three main benefits are very comparable to number 5 on the list, spray-applied roof coatings.
1 Materials Used: EPDM and Single ply roofs are cheaper materials that will not last as long. 2  Higher quality roofing such as polyurethane foam may cost a bit more, but it will insulate and last the life of the building. 3  In contrast, a roof, such as Tar & Gravel, with insulation will cost about the same as an SPF roof. Higher quality roofing such as polyurethane foam may cost a bit more, but it will insulate and last the life of the building. 2  In contrast, a roof, such as Tar & Gravel, with insulation will cost about the same as an SPF roof.