Construction Guides

Featured guides

• How to Measure an L-Shaped Room for Flooring

  Split an L-shaped room into two rectangles, measure each, and add the areas. Includes a worked example with exact numbers. read more

• Measuring Irregular Rooms: T-Shapes, U-Shapes, and Alcoves

  How to break any odd-shaped room into rectangles and get a usable square footage. Covers closets, bay windows, and alcoves. read more

• Laying Out a Square Room: The 3-4-5 Method

  How to check if a room is square and how to establish square layout lines before installing flooring, tile, or framing. read more

Featured guides

• Which Flooring Should You Choose? Laminate, LVP, Hardwood, Tile, or Carpet

  A side-by-side comparison of the five most common residential flooring types: what each is best for, where it fails, water resistance, DIY difficulty, and expected lifespan. read more

• Flooring Waste Factors Explained: Why 10% Is Not Always Enough

  Why waste factors vary by material and pattern. Straight lay vs diagonal vs herringbone, tile base waste, and when to order extra for future repairs. read more

• Flooring Pattern Layouts: Straight, Diagonal, and Herringbone

  How each installation pattern affects material waste, labor difficulty, and the look of a room. When each pattern makes sense. read more

• Flooring Cost by Room Type: What Each Room Typically Costs

  Installed flooring ranges for bedrooms, kitchens, bathrooms, basements, stairs, and living areas, plus the add-ons and material-to-labor math that move a real quote. read more

Featured guides

• Concrete Volume Basics: Slabs, Footings, Columns, and Walls

  How to calculate concrete volume for the most common shapes. Includes the formulas and a worked example for each. read more

• Concrete Mix Basics: Bagged vs Ready-Mix, PSI, and When Each Makes Sense

  How to choose between bagged concrete and a ready-mix truck. What PSI means, how weather affects curing, and how much a project typically needs. read more

• Concrete Driveway Slope and Drainage Basics

  How much slope a driveway needs for drainage, how to measure existing slope, and what happens when a driveway is too flat or too steep. read more

• Concrete Subgrade Basics: Compaction, Base, and What Lies Under the Slab

  What concrete subgrade is, how to prepare it, compaction targets, base depth tables, soil types, and when to use gravel, vapor barrier, or stabilization. read more

• Concrete Formwork Basics: How to Build Forms for Slabs and Walls

  What concrete formwork is, how to choose lumber and plywood, stake spacing, bracing, the 3-4-5 square method, concrete pressure, release agents, and form removal times. read more

• Concrete Curing Basics: Why Curing Matters and How to Do It

  What concrete curing is, why curing determines final strength, how to cure a slab with water, wet coverings, or membrane compounds, and curing time by temperature and cement type. read more

Featured guides

• ADA Ramp Requirements: Slope, Width, Landings, and Handrails

  The key ADA requirements for wheelchair ramps: maximum slope, minimum width, landing sizes, handrail rules, and edge protection. What the numbers mean in practice. read more

• Gravel Basics: Types, Sizes, and How Much You Need

  The common gravel types and what they are used for. How to estimate gravel volume for a path, driveway, or drainage area, and how depth changes the amount. read more

• Retaining Wall Basics: Blocks, Drainage, and When a Wall Needs Engineering

  How retaining walls work, what causes them to fail, the role of drainage, and practical rules of thumb for when a wall is simple and when it needs professional design. read more

Featured guides

• Understanding Roof Pitch: How It Affects Area and Material Quantities

  What roof pitch means, how to measure it, and why a steeper roof needs more material than the flat footprint suggests. Includes the pitch multiplier table. read more

• Roofing Waste Factor: How Much Extra Material Do You Need?

  What creates waste on a roofing job: hips, valleys, dormers, cut pieces, and starter strips. How to factor waste into a shingle takeoff. read more

• Roofing Underlayment Basics: Felt, Synthetic, and Where Each Goes

  The main underlayment types, where each is used on a roof, and how underlayment affects the total material order for a roofing job. read more

• Roofing Takeoff from Plans: Measure & Estimate Materials

  How to take roof measurements off a drawing set: verify scale, read a roof plan, apply pitch factors, and turn the takeoff into roof material quantities. read more

• Roof Ventilation Basics: Intake, Exhaust & Balance

  How balanced roof ventilation works: roof intake vents, roof exhaust vents, net free area, the 1/150 and 1/300 ratio rules, and sizing soffit and ridge vents for attic ventilation. read more

• Roof Flashing Basics: Types, Valleys, Chimneys & Walls

  How roof flashing types — step flashing, counter flashing, valley flashing, chimney flashing, and kickout flashing — carry water over, under, and away from every roof intersection, plus the installation sequence and repair cost ranges. read more

• Roof Shingle Types: 3-Tab, Architectural & Costs

  Roof shingle types compared tier by tier: 3-tab vs architectural shingles, luxury asphalt shingles, roof shingle costs per square, wind and impact ratings, bundle and waste math, and how to choose. read more

• Roofing Tear-Off Basics: Layers, Disposal & What to Expect

  What a roof tear-off involves, when the code requires a tear-off instead of an overlay, how multiple roof layers affect weight and cost, the roof tear-off process step by step, and how roofing debris disposal and recycling work. read more

• Metal Roofing Basics: Standing Seam, Metal Shingles, and Costs

  The metal roofing types compared end to end: standing seam vs metal shingles, exposed fastener panels, corrugated profiles, metal roof cost per square foot, gauge and finish choices, minimum slope rules, and the 50-year cost math against asphalt. read more

• Roof Drip Edge & Ridge Cap: Placement and Quantity

  Where the drip edge goes at the eaves versus the rakes, where ridge cap shingles sit at the peak and hips, the IRC rules behind both, how much drip edge you need from your roof perimeter, and how to calculate ridge cap bundles with waste. read more

Featured guides

• Waste Factors Reference: Materials and Patterns

  A single reference table for waste factors across flooring, roofing, concrete, and lumber — by material and by installation pattern. Use it when the calculator's default does not match your situation. read more

• Board Footage Basics: How Lumber Is Sold and Calculated

  What a board foot is, how to calculate it, why lumber pricing uses board feet, and how to estimate lumber for a framing or decking project. read more

• Fastener Spacing Guidelines: Nails, Screws, and Staples by Material

  Common fastener spacing for sheathing, decking, siding, and flooring. What the spacing rules are and why they matter for hold-down and code compliance. read more

• Lumber Sizes and Grades: What the Numbers Mean

  The nominal vs actual lumber dimensions chart, the actual size of a 2x4, standard lumber sizes and lengths, softwood grades from Select Structural to No. 3, and how to read a lumber grade stamp. read more

• Concrete Bag Coverage: How Much Each Bag Covers (40, 60 & 80 lb)

  How much a 40, 60, and 80 lb bag of concrete covers by slab thickness, cubic feet of yield per bag, square feet per bag, and how many bags make a cubic yard. read more

• Roofing Coverage Reference: How Many Bundles Make a Square

  How many bundles of shingles are in a square, what a bundle covers, squares to square feet, pitch multipliers, waste allowances, and the accessories a bundle count leaves out. read more

• Paint and Coating Coverage Reference: How Far a Gallon Goes

  How much a gallon of paint covers by paint type, primer, ceiling, exterior, and textured surface, plus container sizes, spray-can coverage, and the gallons formula. read more

• Drywall Reference: Sheet Sizes, Screw Spacing, and Joint Compound

  Standard drywall sizes and thicknesses with sheet weights, screw spacing, joint compound and tape coverage per sheet, and the formula for sheets per room. read more

• Wall and Roof Sheathing Reference: Thickness, Sizes, and Nailing

  Wall and roof sheathing thickness by stud and rafter spacing, OSB and plywood panel sizes, span ratings, nail spacing, and subfloor specs. read more

• Insulation R-Values Reference: What Each Level Means

  Insulation R-value per inch by material, recommended attic, wall, floor, and basement levels by climate zone, and how many inches R-49 takes. read more

• Construction Units and Conversions: The Numbers You Keep Looking Up

  Construction conversion chart for cubic yards, square feet, square yards, decimal feet, and metric units, with coverage tables, material weights, and worked examples. read more

Featured guides

• Installed Cost vs Material Cost: What Each Number Really Means

  The difference between material-only pricing and installed pricing. What gets included in labor, why the gap varies so much by material, and how to compare quotes that use different bases. read more

• Regional Price Variations in Construction: What Changes and Why

  Why the same flooring job costs differently on the West Coast vs the Midwest. The drivers: labor rates, material availability, delivery, and local market competition. read more

• Tear-Out and Disposal Costs: Roofing, Flooring & Demolition

  What demolition really costs: roof tear-off per square, flooring and concrete removal rates, dumpster sizes and overage fees, tipping fees by ton, and when asbestos testing is required. read more

• How to Estimate Labor Hours: Formula & Production Rates

  Turn a takeoff into hours: production rates by trade, the man-hour formula, labor hours vs crew hours, and realistic timelines for drywall, roofing, flooring, and paint. read more

• How to Read a Contractor Bid: Line Items and What to Compare

  Read a bid in the order that matters: exclusions, allowances, change orders, payments, then the total. How to level three bids into comparable numbers and spot the gaps before you sign. read more

• Contractor Markup on Materials: Typical Range & Pricing

  What contractors add on top of material costs and why: typical markup ranges by material type, markup versus margin, trade pricing versus retail, and how price escalation clauses work. read more

• How to Estimate a Flooring Job: Material, Labor & Extras

  Build a flooring estimate in six layers: room takeoff, waste by material, tear-out and disposal, subfloor prep, labor by task, then stairs, trim, markup, and the terms that settle disputes. read more

Featured guides

• Stair Code Basics: Riser Height, Tread Depth, and Headroom

  The most common stair code requirements: maximum riser height, minimum tread depth, headroom clearance, and nosing. What the numbers are and why they exist. read more

• Egress Basics: Window and Door Requirements for Bedrooms

  What makes a window or door an egress opening, the typical size and opening area requirements, and why egress matters in bedrooms and basements. read more

• When DIY Work Needs a Permit: A Practical Guide

  The common triggers for building permits: structural, electrical, plumbing, and occupancy changes. How to tell when a project is simple and when it is not, and how to check locally. read more