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 guideStair Code by State: Rise, Run, Headroom and Handrails
IRC stair rules and the seven states that change them: 7 3/4 in rise and 10 in run, and where an 8 1/4 in riser over a 9 in tread is legal instead.
Read guideResidential Building Code Edition by State: IRC, NEC, and Energy Code
Which IRC, NEC and energy code edition each state has adopted for homes, with effective dates, pending updates, and states with no statewide code.
Read guideNational Codes
National code references that apply across multiple jurisdictions.
Frost Depth by State: How Deep Footings Must Go
How deep footings must go: the IRC 12-inch rule, frost depths from 11 state codes, county tables for MN, IN, OR and KY, and what is exempt.
Read guideGround Snow Load by State: How to Find Your Design Number
The 70 psf prescriptive limit, the free ASCE lookup tool, and the 7 states that publish their own ground snow load numbers by county or town.
Read guideEgress Window Requirements by State: What the Code Actually Changes
The IRC R310 escape-window rule, the existing-window replacement exemption, and the 7 states that loosen or tighten it for basements without a bedroom.
Read guideRadon Zone Map and Radon Construction Rules by State
EPA radon zones explained, the IRC's optional Appendix AF, and the states that legally require radon-resistant construction: IL, MN, MA and NJ.
Read guideWater Heater Seismic Strapping Requirements by State
Which states legally require water heater strapping, the upper-third/lower-third rule, and why California's law ignores earthquake risk entirely.
Read guideEV-Ready Wiring Requirements for New Homes by State
Which states require EV-capable or EV-ready wiring in new homes, the 2024 IRC's optional appendix, and why California's rule is weaker than Washington's.
Read guideSump Pump and Backwater Valve Requirements by State
The national backwater-valve trigger, why sump pumps aren't actually mandated nationally, and the states and cities that amend the baseline.
Read guideDeck Guardrail Height and Permit Rules by State
Why deck guard height is 36 inches almost everywhere except California (42), and why some states, like New Jersey, require a permit for any deck at all.
Read guideSmoke and CO Alarm Requirements for Remodels
When a permitted remodel triggers smoke and CO alarms under the 2024 IRC, the exceptions, placement rules, and states with special resale or battery rules.
Read guideRe-Roofing Code Requirements: Layers, Permits, and Wind
What the IRC says about tearing off vs. roofing over old shingles, ice barrier, fasteners, and permits, plus the states with special re-roof rules.
Read guideCalculator Material Estimation Guides
Each guide answers: "How much material do I need?" — and links directly to its calculator.
Backsplash Tile Material Guide
Tile sheets, thinset, and grout quantities for ceramic, porcelain, glass, and mosaic tile.
View Calculator →Concrete Coverage Guide
How much concrete you need for slabs, footings, and post holes — in cubic yards and bags.
View Calculator →Deck Stain Coverage Guide
Stain quantities by deck size, wood condition, and product type with multi-coat guidance.
View Calculator →Drywall Material + Screw Estimation Guide
Sheets, joint compound, tape, and screw quantities per square foot of wall and ceiling area.
View Calculator →Exterior Paint Coverage Guide
Coverage by siding type — vinyl, wood, stucco, and brick — with primer and weather factors.
View Calculator →Fence Material Estimation Guide
Posts, pickets, rails, and concrete bags for wood, chain link, and split rail fence types.
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 →Flooring Waste & Coverage Guide
Square footage, waste factors by layout pattern, and box quantities for any floor type.
View Calculator →French Drain Guide: Gravel, Pipe, Fabric & Slope
How much #57 stone per foot, 4″ pipe holes-down, the burrito wrap, the 1% (⅛″/ft) slope minimum, and the 8 mistakes that clog a drain early.
Read Guide →How Many Rolls of Wallpaper Do I Need?
Bolts vs single rolls, pattern-repeat and half-drop waste, door/window deductions, and adhesive coverage — with a worked example.
Read Guide →How Much Asphalt Do I Need? Driveway Tonnage Guide
The full layer stack, HMA tonnage (~83 SF/ton at 2 in), aggregate base by soil and climate, compaction factor, and drainage slopes.
Read Guide →How Much Carpet Do I Need? Roll Width & Waste Guide
Roll-width broadloom math, waste by carpet type, pad rolls, tackless and seam tape, and waterfall vs Hollywood stair runners.
Read Guide →How Much Gravel Do I Need? Tons, Yards & Depth Guide
Cubic yards to tons, bag counts, depth by use, density by material, and the compaction factor most calculators skip.
Read Guide →How Much Rebar Do I Need? Size, Spacing & Weight
ASTM A615 bar chart and weight per foot, the +1 grid formula, lap splices, ACI cover defaults, and typical bar/spacing by project.
Read Guide →How Much Sod Do I Need? Pallets, Rolls & Prep Guide
Measure any lawn, choose the right grass, and order the correct pallets and rolls — plus ground prep, laying pattern, and watering the first weeks.
Read Guide →How Much Subfloor Do I Need? Sheets, Screws & Glue
Span rating by joist spacing, sheet counts, the 6-in/12-in fastener schedule, glue coverage, and cement board for tile prep.
Read Guide →How to Sealcoat a Driveway: Coverage, Cracks & Cost
How much sealer you need, coal-tar bans by state, the crack-width fix, two-coat technique, cure windows, failure modes, and cost ranges.
Read Guide →How to Space Board & Batten (+ Wainscoting Height)
The batten-in-every-corner spacing formula, the rule-of-thirds wainscot height, box sizing, MDF vs PVC, and the full install sequence.
Read Guide →Insulation Coverage & R-Value Guide
Bags, board feet, and R-value requirements by climate zone per 2021 IECC standards.
View Calculator →Interior Paint Coverage Guide
Gallons needed by room size, coat count, and surface texture — smooth through heavy stucco.
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.
Read Guide →Roofing Shingle Coverage Guide
Shingle quantities, bundle counts, and waste factors calculated by pitch and roof area.
View Calculator →Siding Material Calculator Guide
Coverage rates, waste factors, and trim quantities for vinyl, fiber cement, and wood siding.
View Calculator →How to Use Our Calculators
Input and output explanations only — no installation or construction theory.
Chain Link Fence Calculator (Video)
Video walkthrough showing how to estimate posts, fabric rolls, tension wire, and concrete for a chain link fence.
Drywall Calculator Tutorial
Entering room dimensions to get sheet count, joint compound, tape, and screw quantities.
Fence Calculator Tutorial
Which fence type to select, how to enter linear footage and gates, and how to read your material list.
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.
Roofing Calculator Tutorial
How to enter pitch, area, and overhang to get shingle bundles, underlayment rolls, and ridge caps.
Split Rail Fence Calculator (Video)
Video tutorial showing how to estimate posts and rails for a 2-rail or 3-rail split rail fence.
Wood Privacy Fence Calculator (Video)
Step-by-step video tutorial showing how to estimate posts, pickets, rails, and concrete for a wood privacy fence.
Remodel Planning Guides
Phase-by-phase planning: scope, budgets, permits, sequencing, and what projects return at resale.
How to Plan a Home Remodel (Pillar Guide)
The full lifecycle — scope, budget, permits, build order, inspections, and closeout — with DIY-vs-hire calls at every phase.
Remodel Budget Guide
The two-thirds labor rule, labor/material splits by project type, hard vs. soft costs, and how to size contingency.
Remodel Order of Operations & Timeline
Why HVAC roughs in before plumbing before electrical, critical-path handoffs, lead times, and realistic durations by project.
Remodel Permits & Code Guide
The permit decision tree plus citable IRC numbers — R303, R305, R310, R311.7, R314/R315 — and the inspection sequence.
Remodel ROI Guide (2025)
Cost vs. Value 2025 and NAR Remodeling Impact recoup percentages — and why you should remodel for use, not profit.
Construction Installation References
Technical references used to support calculator assumptions and material estimates.
100-Amp vs 200-Amp Service: Do You Need to Upgrade?
100 vs 200 amp service — what each powers, the loads that force an upgrade (EV, heat pump, all-electric), cost, and why a load calc decides it.
Aluminum vs Copper Wire: Which Should You Use?
Aluminum vs copper wire — ampacity and sizing, termination rules, the AA-1350 branch-wiring myth, cost, and which to use for services vs branch circuits.
Asphalt vs. Concrete Driveway
Cost, lifespan, 20-year maintenance, durability, cure time, and climate fit compared — plus why the right pick flips between the Sun Belt and Snow Belt.
Attic Ventilation Guide (IRC R806)
The 1/150 vs 1/300 NFVA rules, real NFA values by vent type, intake/exhaust balance, powered-fan cautions, and snow/hurricane/WUI overlays.
Backsplash Installation Guide
Surface prep, layout planning, thinset mixing, grouting, and sealing — based on TCNA and ANSI A108 standards.
Basement Humidity & Dehumidifier Sizing Guide
The ideal 30-50% humidity range, sizing a dehumidifier by area and dampness in pints per day, and why the 2019 DOE scale change lowered the numbers.
Carpet vs. Hardwood vs. Vinyl Plank
Cost, lifespan, durability, maintenance, comfort, allergens, and resale compared across all three floors — plus a room-by-room pick for your whole home.
Cedar Shake vs. Vinyl Siding
Real wood vs budget plastic — installed cost, the 3–5 year cedar stain cycle, lifespan, rot/pests, appearance, and why vinyl is the better value for most homes.
Cellulose vs. Fiberglass Insulation
Cost per R, R-value per inch, settling, fire, moisture, sound, and code compared — plus the stale “fiberglass causes cancer” and “cellulose is a fire hazard” claims, corrected.
Cinder Block vs. Poured Concrete
Foundation walls compared on cost, lateral (backfill) strength, water resistance, insulation, and code — plus where reinforced CMU and ICF fit.
Cold-Climate Heat Pumps: Sizing for Real Winters
Why heat pumps lose capacity in the cold, how hyper-heat models hold more, balance point and backup heat, and sizing on low-temperature capacity.
Complete Interior Painting Guide
Prep, priming, cutting in, rolling technique, and cleanup. Order of operations, common mistakes, and paint finish selection.
Concrete Strength, Weather & Additives Guide
The water-cement ratio, ACI 306/305 cold- and hot-weather rules, air entrainment for freeze-thaw, admixtures, fiber vs. wire mesh, and base compaction.
Countertop Materials Compared
Granite, quartz, quartzite, marble, soapstone, sintered, wood, and more — heat/scratch/acid resistance, sealing schedules, NSF 51 food safety, ASTM standards.
Countertop Planning: Sizes, Overhangs & Seams
Heights and depths by room, NKBA landings and seating overhangs, NSI cantilever limits, slab classes, AWI seam rules, cutouts, and NEC receptacle notes.
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.
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.
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.
Detached Garage Subpanel: Feeder, Grounds & Rods
Feeding a detached garage or shed subpanel — the 4-wire feeder, separated neutrals and grounds, ground rods at the building, disconnect, and burial depth.
Do You Need a Plumbing Permit?
The minor-work exemptions that need no permit, why water heater swaps almost always do, the license-vs-permit distinction, and homeowner and well/septic rules.
Drain Pipe Slope: The 1/4-Inch-Per-Foot Rule
The correct drain slope by pipe size, why 1/4 inch per foot is standard, why over-sloping clogs drains too, and how the IPC and UPC codes differ.
Drywall Screw Specification Guide
GA-216 screw spacing standards, coarse vs fine thread selection, lengths by thickness, and per-sheet counts.
Drywall Types & Finish Levels (GA-214/216)
Type X and moisture-resistant board placement by code, finish levels 0–5, framing-spacing rules, control joints, and seam placement strategy.
Electric Tankless Water Heater: Breaker & Wire
Why a whole-home electric tankless unit needs multiple 40-60A circuits and a 200A+ panel, how to size them by model, and why the panel is the real limit.
Electrical Permits by State: When Homeowners Can DIY
All 50 states + DC — homeowner license exemptions, the permit-vs-license distinction, minor-work carve-outs, and the states where DIY is effectively prohibited.
Engineered vs. Solid Hardwood
Cost, refinishing by wear-layer millimeters, where each installs (slab, basement, radiant), stability, and lifespan compared — plus why total plank thickness misleads.
EV Charger Circuit: Wiring & Breaker Size (NEC 625)
Wiring a home EV charger per Article 625 — the 125% continuous-load rule, dedicated circuit and GFCI, hardwired vs plug-in, and confirming panel capacity.
Floor Tile Installation Guide (TCNA)
L/360 deflection, plywood assemblies, PEI/DCOF ratings, thinset coverage, expansion joints, and a 7-day timeline.
Framing Rough Openings: Headers, Kings & Jacks
R.O. sizing rules, the IRC R602.7 header tables, NJ jack + R602.7.5 king stud counts, cripples, and the 0.70 dropped-header span reduction.
Gas vs. Electric Water Heater
Running cost (rate-dependent break-even math), recovery speed, the heat-pump option, install and venting, code, and current 2026 rebate status compared — plus which to buy.
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.
Heat Pump vs. Air Conditioner
Heat pump vs central AC for 2026 — cooling is a tie, so the decision is the ~$1,000–$3,000 upcharge for a unit that also heats, plus lifespan, climate, and which to buy.
Heat Pump vs. Furnace
Heat pump vs gas furnace for 2026 — the operating-cost break-even by fuel price and climate, cold-climate performance, dual-fuel, lifespan, safety, and which to buy.
Hot Tub Wiring: GFCI, Disconnect & Bonding (NEC 680)
Wiring a 240V spa per Article 680 — the GFCI circuit, the 5-foot maintenance disconnect, #8 solid copper equipotential bonding, and burial depth.
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.
How to Do an Electrical Load Calculation (NEC 220)
Sizing a home electrical service with an NEC Article 220 load calc — the Standard and Optional methods, demand factors, and turning VA into a service size.
How to Install Baseboard & Trim
Cope inside corners, miter outside corners, cut, nail, scribe, caulk and finish like a pro. Covers baseboard, door and window casing, base shoe, and crown.
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.
How to Read Your Water Pressure
The 45–60 psi target and 80 psi code limit, testing with a hose-bib gauge, PRVs and thermal-expansion tanks, and tracking down high or low pressure.
How to Stain a Deck (Step-by-Step)
The full deck-staining process: check wood readiness, clean and brighten, apply without lap marks or peeling, then cure and maintain. Penetrating vs. film-forming.
HVAC Sizing Guide: Why Bigger Is Not Better
Manual J load vs square footage, Manual S oversizing limits, why a too-big system short-cycles, and how furnaces, ACs, mini-splits, and ducts are sized.
Insulation R-Value Standards Guide
R-value requirements by climate zone with material comparisons for fiberglass, cellulose, and spray foam.
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.
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.
Metal Roof vs. Asphalt Shingles
Cost, lifespan, hail/fire/wind durability, energy, noise, weight, and resale ROI compared — plus which roof wins for your climate, budget, and how long you’ll stay.
Mini Split vs. Central Air
Ductless mini-split vs central AC compared — cost by zone and whole-house, SEER2 efficiency and duct losses, cold-climate heating, sizing, and correct 2026 rebate status.
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.
NEMA 14-50 vs 6-50: Which 50-Amp Outlet?
14-50 vs 6-50 outlet — 4-wire vs 3-wire and the neutral, use cases (range/RV/EV vs welder), which for an EV charger, and the GFCI and hardwire rules.
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.
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.
Paver Patio vs. Concrete Patio
Cost, cracking and freeze-thaw, base prep, invisible-vs-visible repairs, drainage, and resale value compared — plus where stamped concrete fits and why the base decides everything.
PEX vs. Copper Pipe
Cost, lifespan, freeze resistance, pinhole corrosion, water quality, code, and DIY install compared — plus which wins for a repipe, new build, or freeze-prone runs.
Quartz vs. Granite Countertops
Cost, heat tolerance, sealing and maintenance, stains, food safety, appearance, and resale compared — plus the engineered-stone worker-safety issue to know.
Recessed Lighting Layout: Spacing & How Many
Laying out downlights — the ceiling-height-over-2 spacing rule, the wall offset, and a foot-candle brightness check so the room is bright enough, not just even.
SEER2, HSPF2 & AFUE: HVAC Efficiency Ratings
What the ratings mean, why the 2023 SEER2/HSPF2 test dropped the numbers, federal minimums, capacity vs efficiency, and whether high efficiency pays back.
Septic Tank Sizing by Bedrooms & State
Why septic tanks are sized by bedrooms, how state and county rules differ, the garbage-disposal adder, and why the drainfield is sized separately.
Shiplap vs. Board and Batten
Cost, DIY difficulty, the look, and best materials by room compared for an accent wall — plus the planning math each needs and the honest trend read.
Spray Foam vs. Blown-In Insulation
Cost (with the board-foot pricing trap), R-value, air-sealing, and vapor compared for foam vs loose-fill — plus which material actually belongs in your attic, walls, or rim joist.
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.
Standing Seam vs. Exposed-Fastener Metal Roof
Concealed clips vs screw-down panels compared — cost per square, the thermal-movement/fastener-slotting leak problem, lifespan, slope limits, and house vs barn.
Stucco vs. Fiber Cement Siding
Two cement claddings on a climate axis — installed cost, freeze-thaw cracking vs all-climate stability, maintenance, fire, and the fiber-cement resale edge.
Sump Pump Sizing: GPM & Total Dynamic Head
Sizing a sump pump by flow and total dynamic head, why the box max-GPM is not your operating point, and how to read a pump-performance curve.
Tank vs. Tankless Water Heater
Cost, DOE efficiency, lifespan, the cold-water sandwich, the electric-tankless amperage catch, and 2026 rebates after the federal 25C credit expired.
Tankless Water Heater Sizing: GPM & Temp Rise
Sizing a tankless heater by simultaneous flow and temperature rise, why cold inlet water shrinks capacity, and why you buy on the flow curve.
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.
Vinyl Plank vs. Laminate Flooring
LVP vs laminate compared — installed cost, waterproof core vs water-resistant HDF, the mil-vs-AC wear-rating confusion, feel underfoot, and which wins room by room.
Vinyl vs. Fiber Cement Siding
Cost, resale ROI, lifespan, fire resistance, maintenance, and climate fit compared — plus where LP SmartSide engineered wood fits as a third option.
Vinyl vs. Metal Siding
Vinyl vs steel and aluminum — installed cost, 40–60 year lifespan, fire, and the coastal-steel and hail-aluminum traps that decide which metal fits your climate.
Voltage Drop: The Formula, the 3% Rule & When It Matters
The K-factor voltage-drop formula, why the 3% and 5% figures are recommendations not code, when drop actually matters, and how to fix it by upsizing.
Water Softener Sizing: Grain Capacity Explained
Sizing a softener by grain capacity from household size, hardness, and iron, and why the right size runs more salt-efficiently than the biggest unit.
What Amp Service Do I Have? 3 Ways to Tell
Main breaker rating, service-entrance wire size (NEC Table 310.12), and meter class — the two-of-three method for identifying 100 vs 150 vs 200 amp service.
What Size Generator Do I Need?
Sizing a backup generator by running watts plus the single largest starting surge, why only one surge counts, headroom, and essentials vs whole-house.
What Wire Size Do I Need? AWG by Amps (NEC 310.16)
Sizing wire for amps with Table 310.16 — the termination-temperature cap, the small-conductor rule, derating for heat and bundling, and continuous loads.
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.
Whole-House Ventilation & Indoor Air Quality
Why tight homes need mechanical ventilation, the ASHRAE 62.2 rate, exhaust vs supply vs balanced HRV/ERV systems, and spot vs whole-house ventilation.
Whole-House vs Portable Generator: Which to Get?
Standby vs portable generator — what each powers, transfer switch vs interlock, fuel and cost, CO safety, and which fits your outages and budget.
Window Replacement Guide: Egress, U-Factor & Sizing
IRC R310 egress net clear opening, R308.4 safety glazing, IECC U-factor/SHGC by climate zone, insert vs full-frame, and NFRC labels.
Wood vs. Composite Decking
Cost, resale ROI (wood recoups more than composite), heat underfoot, lifespan, maintenance, and joist spacing compared — plus the “maintenance-free” and “stays cool” myths, corrected.