The answer to 'flashing vs' is that flashing and siding are both important components of a home's exterior, but they serve different purposes. Flashing is a thin, waterproof material installed around roof edges, chimneys, windows, and other areas to prevent water from seeping in, while siding is the exterior cladding that covers the walls of a home.
Flashing is typically made of metal, such as aluminum or galvanized steel, and is designed to direct water away from vulnerable areas, while siding can be made from a variety of materials, including wood, vinyl, brick, or fiber cement. Flashing is generally more expensive than siding, but it is a crucial element in maintaining a home's weatherproofing and preventing water damage. Siding, on the other hand, is primarily for aesthetic purposes, but it also provides some level of insulation and protection from the elements.