HardiePanel vertical joints — land on a stud, then caulk or batten
Vertical panel seams must fall on a stud, then close with either a caulked gap over flashing or a batten / H-mold. The joint method drives the batten and trim count.
What this diagram shows
A horizontal section looking down through two fiber-cement panels meeting over a stud. Option A leaves a small gap between panels, sealed with caulk over joint flashing behind. Option B covers the seam with a batten or PVC H-molding. In both cases the vertical joint falls on framing — panels cannot be seamed in the middle of a stud bay. Which method you pick sets how many battens or trim pieces the calculator counts.
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Fiber-Cement Panel Calculator
Free fiber-cement panel calculator — 4x8/4x9/4x10 vertical HardiePanel sheets by column-and-row layout, with battens, trim, breakage and fasteners.
