Abstract: Some embodiments of a substantially nonmetallic flashing device may have a particular sheet thickness to provide enhanced functionality in certain environments, such as a barrier layer for a treated lumber post or flashing for a ledger board that is mounted to a building. In certain embodiments, the substantially nonmetallic flashing sheet may have an advantageous sheet thickness that provides the opportunity for particular surface finishing operations during manufacture while also providing the opportunity for a user to hand-bend the sheet to form permanent bend lines in desired locations. In particular embodiments, the substantially nonmetallic flashing sheet may include a matte finish on a first side, and a glossy finish on a second side, thereby permitting the end-user to select a suitable surface appearance at the job site.

Abstract: A corrosion resistant flashing product may comprise a polymeric composition that is substantially weatherable such that the flashing substantially retains its original properties after prolonged exposure to the outdoor elements while also providing substantial resistance to ACQ or CBA corrosives. In a preferred embodiment, the polymeric material comprises one or more light stabilizers from about 0.3% to about 15% by weight; one or more acrylic impact modifiers and/or process aids from about 2.5% to about 10% by weight; one or more thermal stabilizers from about 0.25% to about 3% by weight; one or more waxes or lubricants (or systems) from about 0.3% to about 7% by weight, and one or more plasticizers from about 0.1% to about 10% by weight.