Adrian Cole builds practical, calculator‑driven tools for estimating construction costs, quantities, and timelines. With internships on mid‑rise residential projects and small commercial fit‑outs, he focuses on turning plan notes and takeoffs into clear numbers teams can use. Over the past 3 years, he has assembled spreadsheets and lightweight web tools that handle unit conversions, crew‑rate assumptions, and change‑order impacts at a modest project scale.
His work translates field inputs—labor hours, production rates, waste factors, and equipment cycles—into step‑by‑step estimates. He documents formulas plainly, tests edge cases, and flags hidden risks like mobilization, delivery minimums, and lead‑time float. Whether building a concrete volume tool or a labor loading chart, Adrian aims for transparent variables, sane defaults, and outputs that match how site teams actually build.
He collaborates with estimators, foremen, and junior PMs to validate quantity methods and ensure calculators reflect real‑world constraints. He keeps scope crisp, explains inputs in the same units the field uses, and publishes short notes on assumptions so decisions stay defensible.
Brandon Keller
Content Specialist
Brandon Keller is a construction estimator who turns drawings and specs into calculator-ready quantities, durations, and cost assemblies. With hands-on experience from residential remodels to small commercial tenant improvements, he focuses on clear inputs, realistic production rates, and transparent waste and lead-time assumptions. He has built estimating sheets and simple web tools that help junior PMs roll up takeoffs, schedule crews, and separate direct costs from markups. His writing favors short, structured steps and consistent units so teams can validate numbers quickly and avoid common pitfalls like double-counting, missing laps, or mixing metric and US units.
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Table of contents
Scope and Units
I’m Brandon Keller, construction estimator & scheduler. This calculator sizes vertical board-and-batten counts for a single flat wall. Units: ft (height, width), in (board width, batten spacing). Outputs are counts of vertical pieces. Planning estimate only—validate against drawings and supplier lengths.
Inputs and Variables
Wall Height (ft) — not used in the count formulas here but needed for cut lengths and waste planning.
Wall Width (ft) — horizontal run to cover.
Board Width (in) — exposed face width of the vertical board.
Batten Spacing (in) — center-to-center spacing between battens.
Typical ranges: board width 1–12 in; batten spacing 10–16 in interior, 12–24 in exterior (wind/load and look dependent). Use consistent units.
Notes: in→ft conversion by dividing inches by 12. Ceiling rounds up to ensure full coverage.
Worked Example (US locale)
Given W = 20 ft, BW = 1 in, BS = 12 in:
Board module width = (1/12 + 12/12) ft = 1.0833 ft
totalBoards = ceil(20 / 1.0833) = 24
totalBattens = ceil(20 / (12/12)) = 20
Result: 24 boards, 20 battens. Sanity check: 24 modules × 1.0833 ft ≈ 26.0 ft total board+space coverage; battens at 12 in centers across 20 ft ≈ 20 pieces—aligns with 1 ft spacing.
Production & Waste Assumptions
Length selection: common stock 8–16 ft; splice location impacts waste. For interior, expect 5–10% waste; exterior 8–15% (cuts, defects).
Height cuts: add trim/base/crown interfaces—deduct overlaps before cutting.
Site factors: out-of-plumb walls, outlets, and window returns increase cut time and waste.
Material and Cost Planning (Simple)
Direct pieces: use totals above. Multiply by wall height for linear footage.
Labor pacing: 20–35 LF/hr per installer for layout, fastening, and cleanup (interior, unobstructed). Exterior siding varies with elevations and weather.
Non‑advisory note: This is a planning estimate. Confirm lengths, profiles, fastening, and weather resistive barriers with project specs and vendor quotes.
Frequently Asked Questions
What do the formulas in this calculator assume?
They assume vertical boards plus battens at regular spacing across a flat wall, using inches-to-feet conversion and rounding up with ceiling to ensure coverage.
Why doesn’t wall height change the counts?
Counts are horizontal; height drives cut lengths, linear footage, and waste, but not the piece counts in these formulas.
How do I handle outside corners and trim?
Add corner/edge trims separately and account for overlaps before cutting boards; this can reduce board height and affect waste.
What waste factor should I use?
Interior: 5–10%; exterior: 8–15%. Increase for short stock, complex cutouts, or out-of-plumb walls.
How do I convert counts to linear footage?
Linear footage per item = wall height (ft). Total LF = count × wall height. Apply waste after.
What spacing should I choose for battens?
Interior aesthetics often 10–16 in o.c.; exterior siding 12–24 in o.c. Verify with design intent and local exposure requirements.
Common pitfalls to avoid?
Mixing inches and feet, double‑counting boards at edges, ignoring trim overlaps, and not rounding up stock to available lengths.
