The Susan Rice bombshell at least explains why the Democrats won't stop babbling about Russia. They need a false flag to justify using national intelligence agencies to snoop on the Trump team.
Flashing is layered protection. So what is flashing? It's a thin layer of waterproof material that keeps water from getting into places it doesn't belong. (Caulk is fine for filling small gaps around windows and doors, but it shouldn't be confused with flashing.)
Flashing Materials. Flashing can be made of sheet metal, plastic or composite materials. Sheet metal flashing is the most durable, and usually the most expensive choice. Copper or stainless steel can be used as flashing.