Board and Batten Siding Calculator — Coverage, Cost & Layout
Board/batten spacing tables, center exposure formulas, T-111 replacement math, and a live wall-area calculator — with the coverage numbers for every material type.
Siding inputs
Area: 360.00 sq ft
Area: 360.00 sq ft
Area: 270.00 sq ft
Area: 270.00 sq ft
Area (½ × base × height): 120.00 sq ft
Typical for Vinyl Double 4 (D4): ≈ $3.00/sq ft · edit above to override.
Final Estimate
Net Siding Area
1,244.00 sq ft
Order Area (with waste)
1,368.40 sq ft
Purchase This
Cost Breakdown
Planning estimate only. Confirm installed exposure, package coverage, supplier quantities, and local labor rates before ordering. Siding color batches change quarterly — buy 5–10% extra for matchability.
Area Breakdown
Trim & Accessories
150.00 linear ft of trim
14 pieces (itemized — each accessory rounded up separately)
Live Board & Batten Estimator
Center = Board(10″) + Batten(1.5″) = 11.5″Coverage per sq ft wall = 11.5 ÷ 12 = 0.958 sq ft boardYour Board & Batten Order
Board & Batten Spacing Reference Table
Every common board/batten combination with center exposure, linear feet of board needed per 1,000 sq ft of wall, and cost-per-sq-foot impact. This table explains why "just any" B&B isn't the same.
8″ board + 1.5″ batten = 9.5″ center = 160 sq ft of board per 1,000 bd ft. This combination uses the least total board material per square foot of wall surface, and the narrowest battens cost the least to buy and install.
12″ board + 2″ batten = 14″ center = only 86 sq ft of board per 1,000 bd ft. The look is more dramatic with wider shadow lines, but you need almost twice the board material for the same wall area — that's a 70–80% cost premium over the 8″ board combo.
Board & Batten Questions — Decision Tree
Top QHow do I calculate Board & Batten siding?
Center exposure = board width + batten width. Coverage per square foot of wall = center ÷ 12. Number of battens = wall length ÷ center distance (round up). Example: 12″ board + 2″ batten = 14″ center → 14÷12 = 1.17 sq ft of board per sq ft of wall. A 2,400 sq ft wall needs about 2,800 sq ft of board area.
Top QWhat's the best board width for B&B siding?
8″ board with 1.5″ batten creates a 9.5″ center — the most economical option. 10″ board creates a 11.5″ center for a wider, more dramatic look. 12″ board with 2″ batten = 14″ center — maximum visual impact but highest waste per square foot of wall.
How far apart should battens be?
Batten spacing IS the center distance — measured from the left edge of one batten to the left edge of the next. Standard B&B uses spacing equal to board width + batten width. 8″ board + 1.5″ batten = 9.5″ center. Do NOT use 12″ centers universally — that only works with specific board/batten combinations.
How much waste for Board & Batten?
Vinyl B&B: 8–10% waste. Fiber cement B&B: 12–15% (cuts chip easily). Wood B&B: 10–12% (natural defects + cutting). Waste is slightly higher than lap because each batten needs precise length cuts.
What does 'center exposure' mean?
Center exposure is the distance between the center of one board to the center of the next board — or equivalently, the distance between the left edge of one batten to the left edge of the next. For B&B, center = board width + batten width. This number directly controls how many battens you need.
Is vertical siding the same as Board & Batten?
Not exactly. All B&B is vertical, but not all vertical siding is B&B. Vertical lap siding (one vertical board per course) uses a simpler math, while B&B specifically uses two components — a wide board and a narrow batten — which creates the shadow lines that define the style.
Board & Batten vs. T-111 siding — what's the difference?
T-111 is an OSB plywood product with vertical grooves mimicking B&B. It's cheaper (sometimes $2–$4/sq ft) and faster to install but: (1) it's plywood — it delaminates and rots in 15–25 years vs B&B's 25–50, (2) it lacks the real board/batten depth and shadow lines, (3) replacement boards are hard to match once grooves fade.
How to replace T-111 with Board & Batten?
Two approaches: (1) Overlay: install B&B directly over T-111 panels — works if existing surface is flat and solid, adds about 1″ to wall thickness. (2) Full replacement: strip T-111, repair sheathing if needed, then install B&B. Full replacement is $1–$2/sq ft more expensive but lets you inspect and fix rot before hanging new siding.
How much does Board & Batten cost per square foot?
Vinyl B&B: $7–$12/sq ft installed. Fiber cement B&B: $8–$15/sq ft. Wood (cedar) B&B: $10–$18/sq ft. Standing seam metal B&B: $10–$15/sq ft. Material alone is typically 50–60% of the installed cost.
Do I need furring strips under Board & Batten?
Not on new construction or if installing over flat sheathing. But furring strips (1×3 or 2×2 boards horizontal every 16″) help on walls that are slightly bowed, provide ventilation gap behind the siding (prevents moisture buildup), and make it easier to nail battens at consistent heights.
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