Construction Guides & Standards
Construction guides and industry standards used in our calculators for accurate material estimation and professional construction planning.
Deck Construction Guide: Joists, Beams, Footings & IRC Code
Deck-building reference based on 2021 IRC R507 and AWC DCA 6: joist spans, beam spans, footings, ledger fasteners, decking, stairs, and railings.
Read Guide →How to Install Baseboard & Trim: Step-by-Step
How to install baseboard and trim: cope inside corners, miter outside corners, cut, nail, scribe, caulk and finish like a pro. Casing and crown too.
Read Guide →How to Stain a Deck: Step-by-Step DIY Guide
How to stain a deck step by step: check wood readiness, clean and brighten, apply without lap marks or peeling, then cure and maintain. Free DIY guide.
Read Guide →Deck Stain Coverage: How Much Per Square Foot
Deck stain coverage rates by wood condition, stain type, and application method. Manufacturer specs for railings, vertical surfaces, and multi-coat systems.
Read Guide →DIY Backsplash Tile Installation: The Complete Guide
Step-by-step backsplash tile installation from surface prep through sealing. Substrate, layout, thinset, grouting, and 13 mistakes to avoid.
Read Guide →Insulation R-Value Requirements by Climate Zone (IECC)
R-value requirements, material costs, coverage rates, and installation standards for residential insulation. Fiberglass, cellulose, and spray foam compared.
Read Guide →Drywall Screw Guide: How Many Screws Per Sheet?
GA-216 screw spacing, coarse vs fine thread selection, correct lengths by drywall thickness, and exact screw counts per 4×8 sheet. Per ASTM C1002.
Read Guide →Floor Tile Installation Guide: TCNA & ANSI Standards
Install floor tile right — L/360 deflection, plywood subfloors, PEI/DCOF ratings, thinset coverage, waterproofing, and expansion joints. TCNA & ANSI.
Read Guide →Mortar & Thinset Guide: ANSI Class, Trowel Size & Bag Count
Pick the right ANSI mortar (A118.1/.4/.11/.15/.3 or A136.1 mastic) for substrate and tile, choose a trowel notch, and calculate bag count.
Read Guide →Stairs Building Guide: IRC Code & Stringer Span Tables
Residential stair guide — IRC R311.7 / 2024 R318.7 limits, three master equations, AWC DCA 6 stringer spans, six layouts, and 10 inspection fails.
Read Guide →HardiePlank Installation Guide: HZ5 vs HZ10, Nailing & Trim
HardiePlank installation rules from James Hardie HS11119 + ESR-2290: HZ5/HZ10 differences, fastening, butt joints, HardieTrim, kickout flashing, warranty.
Read Guide →How to Use a Wood Privacy Fence Calculator (Video Tutorial)
Step-by-step video tutorial: estimate materials for a wood privacy fence. Inputs and results for posts, pickets, rails, and concrete bags.
Read Guide →How to Use a Chain Link Fence Calculator (Video Tutorial)
Video walkthrough: estimate materials for a chain link fence. Inputs and results for posts, fabric rolls, tension wire, and concrete bags.
Read Guide →How to Use a Split Rail Fence Calculator (Video Tutorial)
Video tutorial: estimate posts and rails for a split rail fence. Walk through the calculator inputs and results for a 2-rail or 3-rail build.
Read Guide →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, IRC R703.4.
Read Guide →How to Measure Your Room & Calculate Square Footage
How to measure walls, ceilings, and trim for accurate paint estimates. Covers L-shaped rooms, stairwells, angled ceilings, and window and door deductions.
Read Guide →When You Need Primer: Drywall, Wood & Bare Surface Guide
When you actually need primer — and when you don't. Industry guidelines for new drywall, bare wood, stain blocking, major color changes, and shiny surfaces.
Read Guide →Dark to Light Color Changes: Professional Guide
How to paint over dark colors without streaks or bleed-through. Covers tinted primer selection, coat counts, and pro techniques for dramatic color changes.
Read Guide →Choosing the Right Paint Sheen: Flat to Gloss
How to choose the right paint sheen. Covers flat, eggshell, satin, semi-gloss, and gloss — with durability, washability, and light-reflection tips.
Read Guide →Textured Wall Painting: Coverage Rates for Stucco & Popcorn
Coverage rates and techniques for painting textured walls. Covers knockdown, orange peel, popcorn, and stucco — with extra gallons per texture.
Read Guide →Complete Interior Painting Guide: Prep to Cleanup
Interior painting guide — prep, priming, cutting in, rolling technique, and cleanup. Covers order of operations, mistakes, and finish selection.
Read Guide →Landscape Material Guide: Gravel, Stone, Sand & Topsoil
Calculate cubic yards, tons, and bags for gravel, crushed stone, sand, decomposed granite, river rock, topsoil, and riprap. ASTM D448 / AASHTO M43.
Read Guide →Interior Doors Guide: Rough Openings, Hardware & IRC
Per-door rough openings, hinges, locksets, casing LF, and IRC flags for pre-hung, slab, bifold, bypass, barn, pocket, French, and Dutch doors.
Read Guide →Paver & Patio Installation: The Complete Technical Guide
Concrete, brick, bluestone, travertine, and porcelain pavers — sand-set, mortar-set, pedestal, and PICP installs. ICPI Tech Spec 2/3/4/18.
Read Guide →How to Build a Retaining Wall: Step-by-Step DIY Guide
Step-by-step how-to: build a 4-ft segmental retaining wall the right way — base prep, drainage, geogrid, and cap install. Per NCMA & IRC R404.4.
Read Guide →How Much Gravel Do I Need? Tons, Yards & Depth Guide
Calculate gravel for driveways, patios, and French drains — cubic yards to tons, bag counts, depth by use, density tables, and the compaction factor.
Read Guide →How Many Rolls of Wallpaper Do I Need? Sizing Guide
How many rolls of wallpaper to buy — bolts vs single rolls, pattern-repeat waste, half-drop math, and door/window deductions, with a worked example.
Read Guide →How Much Carpet Do I Need? Roll Width & Waste Guide
How much carpet to buy — roll-width math and fill-piece seams, waste by carpet type, pad rolls, tackless and seam tape, plus stair runner math.
Read Guide →How Much Subfloor Do I Need? Sheets, Screws & Glue
How much subfloor to buy — span rating by joist spacing, sheet counts, the 6-in/12-in screw schedule, glue coverage, and cement board for tile.
Read Guide →Window Replacement Guide: Egress, U-Factor & Sizing
How to size and spec replacement windows — egress net clear opening, where tempered glass is required, U-factor and SHGC by climate zone.
Read Guide →How Much Asphalt Do I Need? Driveway Tonnage Guide
How much asphalt to order for a driveway — the full layer stack, HMA tonnage, base by soil and climate, compaction factor, and drainage.
Read Guide →How Much Rebar Do I Need? Size, Spacing & Weight
How much rebar to order — bar sizes, spacing and cover defaults, the +1 grid formula, lap splices, and weight per foot from ASTM A615.
Read Guide →French Drain Guide: Gravel, Pipe, Fabric & Slope
How to build a French drain — #57 stone, 4″ perforated pipe holes-down, the burrito wrap, the 1% slope minimum, and how much gravel per foot.
Read Guide →How to Plan a Home Remodel: Phase-by-Phase Guide
The complete remodel planning playbook — scope, budget ratios, permits, build order, inspections, and closeout, with IRC citations and DIY-vs-hire calls.
Read Guide →Remodel Budget Guide: Labor Ratios & Contingency
How to budget a remodel with ratios that hold up — the two-thirds labor rule, hard vs. soft costs, and how much contingency to carry by project risk.
Read Guide →Remodel Permits & Code: What Needs One (IRC Guide)
When a remodel needs a permit and when it does not — plus citable IRC numbers for ceiling height, egress, stairs, and the smoke-alarm retrofit trigger.
Read Guide →Remodel Order of Operations & Timeline Guide
The correct remodel sequence — demo to punch list — with rough-in order, inspection gates, material lead times, and realistic durations by project type.
Read Guide →Attic Ventilation Guide: IRC R806 NFA Math & Vents
How much attic ventilation you need — IRC R806.2 1/150 vs 1/300 rules, real NFA values by vent type, intake-vs-exhaust balance, and the mixing mistake.
Read Guide →Framing Rough Openings: Headers, Kings & Jacks
How to frame a rough opening — R.O. sizing rules, IRC header tables, jack and king stud counts, cripples, and the dropped-header span reduction.
Read Guide →Drywall Types & Finish Levels: Code Spec Guide
Type X vs moisture-resistant vs abuse-rated drywall, GA-214 finish levels 0–5, framing spacing rules, control joints, and where code dictates each choice.
Read Guide →Concrete Strength: Water Ratio, Weather & Additives
What actually decides concrete strength — the water-cement ratio, ACI cold and hot weather rules, air entrainment, admixtures, fibers, and base prep.
Read Guide →Countertop Materials Compared: Quartz to Soapstone
Every major countertop material compared — heat, scratch, and stain resistance, sealing schedules, and food-safety ratings, with the standards behind each.
Read Guide →Countertop Planning: Sizes, Overhangs & Seam Rules
Standard countertop heights and depths, NKBA landings and seating overhangs, NSI cantilever limits, slab sizes, seam placement rules, and cutout requirements.
Read Guide →Remodel ROI Guide: What Returns at Resale (2025)
Which remodels pay back at resale — 2025 Cost vs. Value and NAR Remodeling Impact percentages, why exterior projects dominate, and how to use the data.
Read Guide →How Much Sod Do I Need? Pallets, Rolls & Prep Guide
Measure any lawn for sod, choose the right grass, and order the correct pallets and rolls — plus ground prep, the laying pattern, and watering the first weeks.
Read Guide →How to Sealcoat a Driveway: Coverage, Cracks & Cost
How much driveway 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)
Solve even batten spacing with a batten in every corner, get the right wainscoting height, size picture-frame boxes, pick MDF vs PVC, and install it.
Read Guide →Metal Roof vs Shingles: Cost, Lifespan & Which Wins
Metal roofing vs asphalt shingles compared: cost, lifespan, durability, energy, noise, and resale — plus which roof wins for your climate and budget.
Read Guide →Quartz vs Granite Countertops: Which Is Better?
Quartz vs granite countertops compared: cost, heat tolerance, maintenance, stains, food safety, and which is better for your kitchen and cooking style.
Read Guide →Carpet vs Hardwood vs Vinyl: Which Flooring Wins?
Carpet vs hardwood vs vinyl plank compared: cost, lifespan, durability, resale value, and which flooring is best for each room in your home.
Read Guide →Asphalt vs Concrete Driveway: Which Is Better?
Asphalt vs concrete driveway compared: cost, lifespan, 20-year maintenance, climate fit, and which pays off for your budget and region.
Read Guide →Shiplap vs Board and Batten: Which Is Better?
Shiplap vs board and batten accent walls compared: cost, DIY difficulty, the look, best materials by room, and which suits your wall and budget.
Read Guide →Cinder Block vs Poured Concrete: Which Is Better?
Cinder block vs poured concrete foundations compared: cost, lateral strength, water resistance, insulation, and which is better for your basement.
Read Guide →Vinyl vs Fiber Cement Siding: Cost, ROI & Which Wins
Vinyl vs fiber cement siding compared: cost, resale ROI, lifespan, fire, maintenance, and climate fit — plus where LP SmartSide engineered wood fits.
Read Guide →Cedar Shake vs Vinyl Siding: Cost, Upkeep & Value
Cedar shake vs vinyl siding compared: installed cost, the 3–5 year maintenance cycle, lifespan, fire, appearance, and which is the better value for most.
Read Guide →Vinyl vs Metal Siding: Cost, Lifespan & Climate
Vinyl vs metal (steel & aluminum) siding compared: installed cost, lifespan, fire, and the coastal-steel and hail-aluminum traps that decide it by climate.
Read Guide →Stucco vs Fiber Cement Siding: Cost & Climate
Stucco vs fiber cement siding compared: installed cost, freeze-thaw cracking, maintenance, fire, and resale — plus which cement cladding fits your climate.
Read Guide →What Amp Service Do I Have? 3 Ways to Tell (100 vs 200)
How to tell if your house has 100, 150, or 200 amp service — main breaker rating, service wire size, and meter class, plus the cases where each one lies.
Read Guide →How to Read Your Water Pressure (and Fix It)
How to test home water pressure with a $10 gauge, the 45–60 psi target and 80 psi code limit, plus PRV, thermal expansion, and low-pressure fixes.
Read Guide →Tank vs Tankless Water Heater: Cost, Efficiency & Life
Tank vs tankless water heaters compared — cost, DOE efficiency, lifespan, the electric-tankless amperage catch, and 2026 rebates after the 25C credit expired.
Read Guide →PEX vs Copper Pipe: Cost, Lifespan & Which to Use
PEX vs copper pipe compared — cost, lifespan, freeze resistance, water quality, code, and DIY install, plus which wins for a repipe or new build.
Read Guide →Cellulose vs Fiberglass Insulation: Cost & R-Value
Cellulose vs fiberglass insulation compared — cost per R, R-value per inch, settling, fire, moisture, sound, and code, plus which to blow in your attic.
Read Guide →Vinyl Plank vs Laminate: Cost, Water & Durability
Vinyl plank (LVP) vs laminate flooring compared — cost, waterproof vs water-resistant, mil vs AC wear ratings, feel, and which wins by room, bath to bedroom.
Read Guide →Wood vs Composite Decking: Cost, ROI & Heat
Wood vs composite decking compared — installed cost, resale ROI (wood recoups more), heat underfoot, lifespan, maintenance, and joist spacing by material.
Read Guide →Spray Foam vs Blown-In Insulation: Cost & R-Value
Spray foam vs blown-in insulation compared — cost (with the board-foot trap), R-value, air-sealing, vapor, code, and which belongs in your attic vs walls.
Read Guide →Engineered vs Solid Hardwood: Cost & Refinishing
Engineered vs solid hardwood compared — cost, refinishing by wear-layer mm, where each installs over slab/basement/radiant, stability, and lifespan.
Read Guide →Gas vs Electric Water Heater: Cost & Which to Buy
Gas vs electric water heater compared — running cost (rate-dependent), recovery speed, the heat-pump option, install, venting, code, and 2026 rebates.
Read Guide →Paver Patio vs Concrete Patio: Cost & Durability
Paver vs concrete patio compared — cost, cracking and freeze-thaw, base prep, repairs, drainage, and resale value, plus where stamped concrete fits in.
Read Guide →Heat Pump vs. Air Conditioner: Cooling Is a Tie
Heat pump vs central AC for 2026 — cooling is a tie, so the real decision is the upcharge for a unit that also heats, plus lifespan, climate, and which to buy.
Read Guide →Heat Pump vs. Furnace: Cost, Climate & Which to Buy
Heat pump vs gas furnace for 2026 — operating cost by fuel price and climate, cold-climate performance, dual-fuel, lifespan, and which to buy.
Read Guide →Mini Split vs Central Air: Cost, Efficiency & Cold
Ductless mini split vs central air compared — cost, SEER2 efficiency and duct losses, whole-house zoning, cold-climate heating, and the real 2026 rebate status.
Read Guide →Standing Seam vs Exposed-Fastener Metal Roof: Cost
Standing seam vs exposed-fastener (screw-down) metal roof compared — cost per square, the fastener-slotting leak problem, lifespan, and slope limits.
Read Guide →Do You Need a Plumbing Permit? What to Know
When plumbing work needs a permit — the minor-work exemptions, why water heater swaps almost always do, license vs permit, and homeowner and well/septic rules.
Read Guide →Electrical Permits by State: When Homeowners Can DIY
Can you do your own electrical work? State-by-state homeowner rules for all 50 states — license exemptions, permit requirements, and the states that say no.
Read Guide →HVAC Sizing Guide: Why Bigger Is Not Better
How HVAC is sized — Manual J load vs square footage, Manual S limits, why oversizing short-cycles, and furnace, AC, mini-split & duct sizing.
Read Guide →SEER2, HSPF2 & AFUE: HVAC Efficiency Ratings
What SEER2, HSPF2, and AFUE mean, why the 2023 test dropped the numbers, federal minimums, capacity vs efficiency, and whether high efficiency is worth it.
Read Guide →Cold-Climate Heat Pumps: Sizing for Real Winters
Why heat pumps lose capacity in the cold, how hyper-heat models differ, balance point and backup heat, and how to size on low-temperature capacity.
Read Guide →Whole-House Ventilation & Indoor Air Quality
Why tight homes need mechanical ventilation, the ASHRAE 62.2 airflow rate, exhaust vs supply vs balanced HRV/ERV systems, and spot vs whole-house ventilation.
Read Guide →Basement Humidity & Dehumidifier Sizing Guide
The ideal 30-50% indoor humidity range, how to size a dehumidifier by area and dampness in pints per day, and why the 2019 DOE scale change lowered the numbers.
Read Guide →Drain Pipe Slope: The 1/4-Inch-Per-Foot Rule
The correct drain pipe slope by size, why 1/4 inch per foot is standard, why over-sloping clogs drains too, and how the IPC and UPC codes differ.
Read Guide →Sump Pump Sizing: GPM & Total Dynamic Head
How to size a sump pump by flow rate and total dynamic head, why the box max-GPM is not your operating point, and how to read a pump-performance curve.
Read Guide →Water Softener Sizing: Grain Capacity Explained
How to size a water softener by grain capacity using household size, water hardness, and iron, plus why the right size actually runs more salt-efficiently.
Read Guide →Septic Tank Sizing by Bedrooms & State
Why septic tanks are sized by bedroom count, how state and county rules differ, the garbage-disposal adder, and why the drainfield is sized separately.
Read Guide →Tankless Water Heater Sizing: GPM & Temp Rise
How to size a tankless water heater by simultaneous flow (GPM) and temperature rise, why cold inlet water shrinks capacity, and reading the flow curve.
Read Guide →How to Do an Electrical Load Calculation (NEC 220)
How to size a home electrical service with an NEC Article 220 load calculation — the Standard and Optional methods, demand factors, and reading the result.
Read Guide →EV Charger Circuit: Wiring & Breaker Size (NEC 625)
How to wire a home EV charger circuit per NEC Article 625 — the 125% continuous-load rule, dedicated circuit and GFCI, hardwired vs plug-in, and panel capacity.
Read Guide →What Size Generator Do I Need? Sizing a Backup Generator
How to size a backup generator by running watts plus the largest starting surge, why only one surge counts, headroom, and essentials vs whole-house.
Read Guide →What Wire Size Do I Need? AWG by Amps (NEC 310.16)
How to size wire for amps with NEC Table 310.16 — termination temperature limits, the 240.4(D) small-conductor rule, derating, continuous loads, and aluminum.
Read Guide →Hot Tub Wiring: GFCI, Disconnect & Bonding (NEC 680)
How to wire a 240V hot tub per NEC Article 680 — the GFCI circuit, the 5-foot maintenance disconnect, #8 solid copper equipotential bonding, and burial depth.
Read Guide →Detached Garage Subpanel: Feeder, Grounds & Ground Rods
How to feed a detached garage or shed subpanel — the 4-wire feeder, separated neutrals and grounds, ground rods, disconnect, and burial depth per the NEC.
Read Guide →Voltage Drop: The Formula, the 3% Rule & When It Matters
How to calculate voltage drop with the K-factor formula, why the 3% and 5% figures are recommendations not code, when drop matters, and how to fix it.
Read Guide →Electric Tankless Water Heater: Breaker & Wire Requirements
Why a whole-home electric tankless needs multiple 40-60A circuits and a 200A+ panel, how to size them by model, and why the panel is the real limit.
Read Guide →Recessed Lighting Layout: Spacing & How Many You Need
How to lay out recessed lights — the ceiling-height-divided-by-2 spacing rule, the wall offset, and a foot-candle brightness check so the room is bright enough.
Read Guide →Aluminum vs Copper Wire: Which Should You Use?
Aluminum vs copper wire compared — ampacity and sizing, termination rules, the AA-1350 branch-wiring myth, cost, and which to use for services vs branches.
Read Guide →NEMA 14-50 vs 6-50: Which 50-Amp Outlet?
NEMA 14-50 vs 6-50 outlet compared — 4-wire vs 3-wire, the neutral, use cases (range/RV/EV vs welder), which for an EV charger, and the GFCI and hardwire rules.
Read Guide →Whole-House vs Portable Generator: Which to Get?
Standby vs portable generator compared — what each powers, transfer switch vs interlock, fuel and cost, CO safety, and which fits your outages and budget.
Read Guide →100-Amp vs 200-Amp Service: Do You Need to Upgrade?
100 vs 200 amp electrical service — what each powers, the loads that force an upgrade (EV, heat pump, all-electric), cost, and why a load calc decides it.
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