Determine exact board counts, batten quantities, center-to-center spacing, and reveal gaps for accent walls and exterior siding.
Consider a 120.0-inch wide exterior wall receiving board and batten siding using 5.50-inch wide main boards (1x6), 2.50-inch wide batten strips (1x3), and a 12.0-inch target center-to-center spacing:
Verification Note: Total array sum = (11 battens × 2.5") + (10 boards × 5.5") + (10 reveals × 3.75") = 27.5 + 55.0 + 37.5 = 120.0 in (exact 100% wall coverage).
Board and batten siding uses wide vertical boards capped with narrow wood batten strips over the vertical seams for weatherproofing and classic architectural texture.
Number of Main Boards N = round((Wall Width - Batten Width) / Target Spacing). Center-to-Center Spacing = (Wall Width - Batten Width) / N.
Standard combinations use nominal 1x10 boards (9.25" actual) or 1x8 boards (7.25" actual) with 1x2 (1.5" actual) or 1x3 (2.5" actual) batten strips.
Nailing battens through both board edges locks them together, causing boards to split as they expand and contract with humidity changes. Fasten battens through the center gap between boards.
Leave a 1/2 inch gap between main vertical board edges on exterior walls so wood can swell without buckling.
Install a continuous weather-resistive barrier (WRB) like housewrap or #15 felt paper with flashings over all window and door openings.
For interior drywall accent walls, thin 1/2" MDF or poplar batten strips are applied directly over drywall with 3.5" to 5.5" reveals and top/bottom baseboards.
Use hot-dipped galvanized or ring-shank stainless steel siding nails long enough to penetrate structural wall framing at least 1-1/2 inches.
Where multi-story walls require horizontal butt joints, install metal Z-flashing above lower board tops with a 1/4" drainage gap.
Clear Reveal Gap = (Wall Width - (N * Board Width) - ((N+1) * Batten Width)) / N.
Yes, install vertical furring strips or horizontal girts over rigid foam to provide solid nailing for vertical siding boards.
Position full battens flush against window side casings, or adjust center spacing so a batten centers directly over window symmetry lines.
Western Red Cedar, Cypress, Redwood, and engineered smart-side wood composites provide superior natural rot and insect resistance.
Multiply wall area by 1.20 to account for additional surface area on batten edges and board reveals.
Multiply dimensions in inches by 25.4 mm. A 120-inch wall equals 3048 mm.
Wear ANSI Z87.1 safety glasses, ear protection when operating pneumatic nailers, and fall protection when working on ladders or staging.
For interior accent walls, caulk batten edges before painting. On exterior walls, leave lower batten ends uncaulked to allow drainage.
Cut a 45-degree drip bevel on the bottom ends of boards and keep siding at least 6 inches above soil grade.