Free Board and Batten Calculator — Boards, Battens & Cost (2026)

How to Use This Calculator

1. 1Calculate total wall area in square feet (perimeter x height, minus doors and windows).
2. 2Enter board width (common: 6, 8, 10, or 12 inches).
3. 3Enter batten width (common: 1.5 to 3 inches).
4. 4Enter wall height in feet and click Calculate.

About This Material

Board and batten is a classic vertical siding pattern consisting of wide boards installed upright with narrow strips (battens) covering the seams between them. This design allows natural wood movement -- the boards can expand and contract with humidity changes without opening visible gaps, because the battens bridge the joints. Historically the most common siding on American barns and rural houses, board and batten has experienced a major resurgence in modern farmhouse and contemporary architecture. It is available in natural wood (cedar, pine, redwood), engineered wood (LP SmartSide), fiber cement (James Hardie), vinyl, and composite materials. Board widths typically range from 6 to 12 inches, with 8-10 inch boards being the most popular for residential use. Battens are typically 1.5 to 3 inches wide. The wider the board, the more rustic the appearance; narrower boards with slim battens create a more refined look. Cost varies widely by material: pine boards run $1-3 per linear foot, cedar $3-6, fiber cement $2-4, and engineered wood $2-5. For a typical 480 sq ft wall (12 ft wide x 40 ft perimeter, minus openings), expect 60-80 boards and 65-85 battens depending on width choices. Installation requires a weather-resistant barrier (housewrap) behind the siding. Boards are face-nailed with a single fastener at center to allow lateral expansion. Battens are nailed through the board overlap, not between boards.

Installation Tips

• •Install a weather-resistant barrier (Tyvek or equivalent) over the structural sheathing before any siding.
• •Nail each board with a single fastener at center -- this allows the board to expand and contract without splitting.
• •Battens should be nailed through the board overlap, securing them to the sheathing or studs behind.
• •Leave a 1/8-inch gap between the bottom of boards and horizontal trim for drainage.
• •Pre-prime or seal all cut ends and back surfaces before installation to prevent moisture absorption.

Common Mistakes to Avoid

• ⚠Nailing boards at both edges -- this restricts natural expansion and causes splits and cupping.
• ⚠Skipping the weather-resistant barrier -- essential to prevent water damage to the wall structure.
• ⚠Using battens too narrow to adequately cover the board joints -- minimum 1.5 inches recommended.
• ⚠Not sealing cut ends -- untreated end grain absorbs moisture rapidly, leading to premature rot.

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