Log Siding Calculator — D-Log, Square Log & Timber Coverage
Log siding coverage is completely unlike lap board — it depends on log diameter and overlap, not exposure width. Pick your profile from D-Log (convex) to Square Log (flat) to Timber (structural) and the calculator below runs the diameter-based math.
If you're quoting vinyl, Hardie, or cedar clapboard, use the main siding calculator. For lap clapboard coverage see the cedar shake page— shake and clapboard are two different wood profiles from log siding.
How Diameter and Overlap Control Your Order
Log siding coverage = effective coverage width ÷ 12 (converting inches to feet). Effective coverage = diameter − overlap. Every log follows this formula.
Log Siding vs. Lap Clapboard vs. Shake — The Three Wood Siding Families
Log Siding
Coverage = (diameter − overlap) ÷ 12D-Log, Square Log, Timber. Coverage based on circular or flat geometry. No exposure concept — overlap fixed.
Lap / Clapboard
Coverage = exposure in inches ÷ 12Cedar lap, horizontal clapboard. Exposure is adjustable (4–8″) — more exposure = fewer boards.
Shake / Shingle
Coverage = exposure in inches ÷ 12 × bundle factorSplit-face shake or sawn shingle. Highest waste of any wood — unique shapes mean more culling.
D-Log's convex face creates the iconic log-cabin lookPhoto: UnsplashCompare Other Wood Siding Calculators
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