Guides — Code, Climate & Material Estimation
Building code references, IECC climate-zone requirements, calculator support guides, and construction installation standards. Each guide is grounded in cited industry sources.
Building Code & Climate Guides
Cited references on the codes and climate-zone requirements that shape calculator defaults — IECC, state amendments, and high-wind provisions.
IECC Climate Zones
Prescriptive R-value, U-factor, and SHGC requirements by IECC climate zone.
Climate Zone 1: R-Value Requirements (2021 IECC)
Climate Zone 1 R-value minimums for ceilings, walls, floors, and slabs in Florida Keys, Hawaii, and southern Texas under the 2021 IECC.
Read guideClimate Zone 2: R-Value Requirements (2021 IECC)
Hot-humid Climate Zone 2 R-value minimums for most of Florida, the Gulf Coast, and southern Arizona under the 2021 IECC.
Read guideClimate Zone 3: R-Value Requirements (2021 IECC)
Warm Climate Zone 3 R-value minimums for the Carolinas, Georgia, central Texas, Arizona, and the Mid-South under the 2021 IECC.
Read guideClimate Zone 4: R-Value Requirements (2021 IECC)
Mixed-humid Climate Zone 4 R-value minimums for the Mid-Atlantic, Ohio Valley, Kentucky, Tennessee, and northern Texas under the 2021 IECC.
Read guideClimate Zone 5: R-Value Requirements (2021 IECC)
Cool Climate Zone 5 R-value minimums for Pennsylvania, New York, Michigan, Illinois, Iowa, and the Pacific Northwest interior under the 2021 IECC.
Read guideClimate Zone 6: R-Value Requirements (2021 IECC)
Cold Climate Zone 6 R-value minimums for Minnesota, Wisconsin, Maine, Vermont, Montana, and North Dakota under the 2021 IECC.
Read guideClimate Zone 7: R-Value Requirements (2021 IECC)
Very-cold Climate Zone 7 R-value minimums for northern Minnesota, North Dakota, and high-altitude pockets of Alaska under the 2021 IECC.
Read guideClimate Zone 8: R-Value Requirements (2021 IECC)
Subarctic Climate Zone 8 R-value minimums for most of Alaska under the 2021 IECC and Alaska Building Energy Efficiency Standard.
Read guideState & Local Codes
State and local amendments that meaningfully change construction math.
Florida HVHZ Roofing Requirements
Florida HVHZ wind-zone roofing rules: shingle ratings, fastener schedules, NOA approval, and underlayment per FBC 8th Edition (2023) and Miami-Dade County.
Read guideCalifornia Title 24 Part 6: Envelope Requirements
California Title 24 Part 6 envelope, cool-roof, and prescriptive insulation requirements by climate zone for residential — 2025 cycle effective Jan 1, 2026.
Read guideTexas Windstorm Roofing Requirements
Texas Department of Insurance Seacoast windstorm rules: shingle ratings, fastening, WPI-8 inspection, and Tier I/II requirements for the Texas coast.
Read guideMassachusetts Stretch Energy Code
Massachusetts Stretch Energy Code envelope, HERS, and electrification requirements for residential construction in opt-in municipalities.
Read guideCalculator Material Estimation Guides
Each guide answers: "How much material do I need?" — and links directly to its calculator.
Concrete Coverage Guide
How much concrete you need for slabs, footings, and post holes — in cubic yards and bags.
View Calculator →Roofing Shingle Coverage Guide
Shingle quantities, bundle counts, and waste factors calculated by pitch and roof area.
View Calculator →Fence Material Estimation Guide
Posts, pickets, rails, and concrete bags for wood, chain link, and split rail fence types.
View Calculator →Drywall Material + Screw Estimation Guide
Sheets, joint compound, tape, and screw quantities per square foot of wall and ceiling area.
View Calculator →Flooring Waste & Coverage Guide
Square footage, waste factors by layout pattern, and box quantities for any floor type.
View Calculator →Interior Paint Coverage Guide
Gallons needed by room size, coat count, and surface texture — smooth through heavy stucco.
View Calculator →Exterior Paint Coverage Guide
Coverage by siding type — vinyl, wood, stucco, and brick — with primer and weather factors.
View Calculator →Deck Stain Coverage Guide
Stain quantities by deck size, wood condition, and product type with multi-coat guidance.
View Calculator →Siding Material Calculator Guide
Coverage rates, waste factors, and trim quantities for vinyl, fiber cement, and wood siding.
View Calculator →Metal Siding Guide: Gauge, Profiles, Cost & Install
Metal siding by gauge, profile, and coating. Galvalume vs aluminum, PVDF vs SMP, HVHZ fastener density per MCA, ASTM A653/A792, AAMA, and IRC R703.4.
View Calculator →Insulation Coverage & R-Value Guide
Bags, board feet, and R-value requirements by climate zone per 2021 IECC standards.
View Calculator →Floor Mud / Mortar Bed Material Guide
Mortar volume, sand/cement ratios, and bag counts for shower beds and flat floor pours.
View Calculator →Backsplash Tile Material Guide
Tile sheets, thinset, and grout quantities for ceramic, porcelain, glass, and mosaic tile.
View Calculator →How to Use Our Calculators
Input and output explanations only — no installation or construction theory.
Wood Privacy Fence Calculator (Video)
Step-by-step video tutorial showing how to estimate posts, pickets, rails, and concrete for a wood privacy fence.
Chain Link Fence Calculator (Video)
Video walkthrough showing how to estimate posts, fabric rolls, tension wire, and concrete for a chain link fence.
Split Rail Fence Calculator (Video)
Video tutorial showing how to estimate posts and rails for a 2-rail or 3-rail split rail fence.
Fence Calculator Tutorial
Which fence type to select, how to enter linear footage and gates, and how to read your material list.
Roofing Calculator Tutorial
How to enter pitch, area, and overhang to get shingle bundles, underlayment rolls, and ridge caps.
Drywall Calculator Tutorial
Entering room dimensions to get sheet count, joint compound, tape, and screw quantities.
Flooring Calculator Tutorial
How to enter square footage, select material type, and read waste-adjusted box quantities.
Paint Calculator Tutorial
Entering room dimensions, coat count, and surface texture to get accurate gallon estimates.
Construction Installation References
Technical references used to support calculator assumptions and material estimates.
Deck Construction Guide
IRC R507 framing, beam and joist spans per AWC DCA 6, footing sizing, ledger fastening, decking material specs, stair geometry, and railing.
Paver & Patio Installation Guide
Concrete, brick, bluestone, travertine, and porcelain pavers across sand-set, mortar-set, pedestal, and PICP installs. ICPI Tech Spec 2/3/4/18, ASTM C936/C902/C616.
How to Build a Retaining Wall (DIY Guide)
Step-by-step install of a 4-ft segmental retaining wall — base prep, drainage, geogrid, cap install, and the 5 most common DIY mistakes. NCMA / IRC R404.4.
Stair Building Guide
IRC R311.7 stair geometry, riser/tread limits, stringer spans, handrail and baluster code, plus straight, L, U, winder, spiral, and curved configurations.
HardiePlank Installation Guide
HardieZone HZ5 vs HZ10, fastening per ESR-2290 wind tables, butt-joint detail, HardieTrim 4/4 vs 5/4, kickout flashing, warranty rules.
Floor Tile Installation Guide (TCNA)
L/360 deflection, plywood assemblies, PEI/DCOF ratings, thinset coverage, expansion joints, and a 7-day timeline.
Drywall Screw Specification Guide
GA-216 screw spacing standards, coarse vs fine thread selection, lengths by thickness, and per-sheet counts.
Insulation R-Value Standards Guide
R-value requirements by climate zone with material comparisons for fiberglass, cellulose, and spray foam.
Backsplash Installation Guide
Surface prep, layout planning, thinset mixing, grouting, and sealing — based on TCNA and ANSI A108 standards.
Landscape Material Guide
Cubic yards, tons, and bag counts for gravel, crushed stone, sand, decomposed granite, river rock, lava rock, topsoil, riprap, and boulders. ASTM D448 / AASHTO M43 / NCSA R-class.
Interior Doors Guide
Per-door rough openings, hinge counts, locksets, casing LF, and IRC code flags for all 8 door types — pre-hung, slab, bifold, bypass, barn, pocket, French / double, and Dutch. IRC R311.2 / R302.5.1 / R308.4, ANSI/BHMA A156 series.
Mortar & Thinset Guide
How to pick the right ANSI mortar class (A118.1 / .4 / .11 / .15 / .3 or A136.1 mastic), choose a trowel notch, and calculate bag count. NTCA 2024/2025 Reference Manual, TCNA Handbook, ANSI A108.5/.02/.19.
Deck Stain Coverage Guide
Stain coverage rates by wood condition, stain type, and application method. Manufacturer specs for railings, vertical surfaces, and multi-coat systems.
How to Measure Your Room
How to measure walls, ceilings, and trim for accurate paint estimates. L-shaped rooms, stairwells, angled ceilings, and door / window deductions.
Complete Interior Painting Guide
Prep, priming, cutting in, rolling technique, and cleanup. Order of operations, common mistakes, and paint finish selection.
When You Need Primer
When primer is actually required — and when it isn’t. Industry guidelines for new drywall, bare wood, stain blocking, color changes, and shiny surfaces.
Paint Sheen Guide
Choosing the right paint sheen for every room — flat, eggshell, satin, semi-gloss, and gloss — with durability, washability, and light-reflection tradeoffs.
Dark to Light Painting Guide
How to paint over dark colors without streaks or bleed-through. Tinted primer selection, coat counts, and pro techniques for dramatic color changes.
Textured Wall Painting Guide
Coverage rates and techniques for painting textured walls — knockdown, orange peel, popcorn ceilings, and heavy stucco. Extra gallons needed by texture.