Deck Building Guides
Long-form articles on deck cost, IRC 2021 code, brand comparisons, how-to walkthroughs, and 25-year maintenance schedules. Each guide is paired with the relevant DeckMath calculator so you can run the math while reading the theory.
Cost & budgeting
Deck Building Cost Guide 2026 — Real Pricing
Complete 2026 deck building cost guide: $25-140/sqft by tier, regional labor, permit fees, hidden costs, financing, contractor vs DIY math.
Deck Cost Breakdown 2026 — Line by Line
Deck cost breakdown by line item: lumber, fasteners, labor, railing, stairs, permit, design, contingency. With real 16x20 deck examples in 5 finish tiers.
DIY vs Contractor Deck Cost — 2026 Breakdown
Should you build your deck or hire a pro? Honest 2026 cost breakdown: labor savings, tool investment, material trade discounts, waste, time, and the real risks.
Deck Railing Cost & Code Guide (2026)
Deck railing cost by system (2026) plus IRC R312 code: when a guard is required, 36-inch height, 4-inch sphere rule, and installed price per linear foot.
The 25-Year Deck Cost — Total Cost of Ownership
Why the cheapest deck upfront isn't the cheapest deck. A 25-year total-cost-of-ownership breakdown of PT wood vs cedar vs composite vs PVC, including maintenance and replacement.
Brand comparisons
Composite vs Wood Decking — 25-Year Comparison
Composite vs wood decking compared over 25 years: upfront cost, maintenance, lifespan, environmental impact, brand recommendations, and break-even math.
Trex vs TimberTech — 2026 Brand Comparison
Trex vs TimberTech compared head-to-head: pricing, warranties, color palettes, heat performance, install systems, retailer availability, and 25-year TCO.
Process & how-to
Deck Building Permits — IRC 2021 + State Rules
Complete deck permit guide: IRC 2021 trigger thresholds, state-by-state fees, application process, common rejections, post-build inspections.
How to Build a Deck — Step-by-Step DIY Guide
Complete DIY deck-building guide: planning, permits, layout, footings, framing, decking, railing, stairs. IRC 2021 compliant. Tools list, timeline, and tips.
Floating & Ground-Level Deck Guide (2026)
How to build a floating or ground-level deck: pier options, frost-depth rules, when you need a permit, framing without a ledger, and 2026 cost ranges.
Structural & code
Deck Joist Spacing Guide — IRC R507.6 Tables
Complete deck joist spacing guide using IRC 2021 R507.6 prescriptive tables. By species, size, deck load, and decking material — with composite spacing rules.
Deck Footing Requirements — IRC 2021 R507.3 + R403
Deck footing depth, diameter, frost line, soil bearing, concrete spec — complete IRC 2021 R507.3 + R403.1.4 reference. State-by-state frost depths.
Deck Beam Sizing Guide — IRC R507.5 Span Tables
How to size a deck beam using IRC 2021 R507.5 prescriptive tables — by beam size, ply, species, and tributary width. Built-up assembly, post connection, and cantilever rules.
Deck Stairs Code & Construction — IRC R311.7
Deck stair code and construction guide: IRC R311.7 rise/run, stringer sizing, tread material, landing, handrail and guard rules — with 2026 cost ranges.
Materials & patterns
Maintenance
How DeckMath guides work
Every guide pairs with a DeckMath calculator that lets you run the math from your browser. Cost guides link to the deck-cost calculator. Structural guides link to joist-span / beam-span / footing calculators. Brand-comparison guides link to the composite-deck-cost or trex-deck calculator. Theory in the article; numbers in the calculator.
All content is updated quarterly to match RSMeans 2026-Q1 pricing, current IRC 2021 sections, and active manufacturer warranties + product palettes. Last full review: 2026-05-10.