This cone flashing detail will result in a seam going through the drain clamping ring. Traditionally, positioning a seam through a drain clamping ring has not been allowed.
For years, the construction industry has been aware of moisture issues with freshly poured concrete and its ability to hold and absorb great amounts of water.
The tendency is to think of cool-roof materials as a class of products that fit best in sun-drenched, high-annual-temperature portions of the country. The benefits of Cool Reflective Roofs can be realized in all climate zones.