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Vinyl siding corners overlapping.
When you have to put two pieces of the corner post together to get the length you need be sure the lower piece is underneath and the upper piece is overlapping in order to shed water.
Watch this video learn how to install accessories on multi story structures or very long expanses to allow for expansion and provide water drainage.
Outside corner post protects corners and has a receiving channel that hides the ends of siding panels for a finished professional vinyl siding installation.
Certainteed overview on vinyl siding overlapping accessories.
The corners of vinyl siding are one area where moisture can get in under the siding.
On hot days because the siding will contract when the temperature drops.
Certainteed overview on vinyl siding overlapping accessories.
Always refer to the installation guide on the particular vinyl siding that you re installing but most vinyl siding panels should overlap each other by at least an inch.