Fastening Vinyl Siding trim

The starter strip holds the bottom course of siding

Next, install inside corners ...

... and outside corners up to the soffits, leaving a ¼-inch expansion gap at the top (see“Corner Posts”)

Use J-channel to capture and cover the ends and edges of siding panels.

A specialized trim piece called a “utility” or “finish” channel is spring-loaded on one side.

F-channel is most commonly used as part of soffit detailing, where it captures and supports the edge of the soffit material while leaving a finished edge.

There are many other specialty profiles for installing vinyl siding, from crown and cove profiles to wider window casing, brickmold, and even decorative corner profiles.

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