James Hardie Siding Elite Contractor in North Carolina
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April 17, 2026

Proper Hardieplank Siding Joint Flashing

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Joint flashing: James Hardie recommends that a slip sheet (joint flashing) is installed behind each butt joint in the siding. This is a 6” wide piece of weather-resistive material to make sure that no water gets through.

Proper Hardieplank Siding Joint Flashing
1. Roofing Felt Paper
2. House wrap
3. Joint Flash

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Author – Wesley Newton

Co-Founder & Owner, Carolina Exteriors

A construction‑industry veteran with more than two decades of experience, Wesley leads Carolina Exteriors’ mission to deliver exceptional customer experiences on every project across the Triangle.

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