Construction Guides

How to Calculate Concrete Volume

Step-by-step formula with examples for slabs, footings and columns, plus waste percentage and unit conversion tips.

Concrete Strength Grades Explained

PSI and MPa strength grades for concrete, what they're used for, and how US and international (EN 206) classifications compare.

How to Mix Concrete by Hand

Cement vs concrete, mix ratios, bagged premix yields, how much water to add, safety and curing.

Concrete Curing Time Guide

How long concrete takes to cure at every stage — 24 hours, 7 days, 28 days — and how temperature affects strength gain.

What Size Rebar Do I Need?

US bar sizes #3–#11 with weights, 2024 IRC slab and footing rules, and ACI 318 spacing limits.

How to Calculate Stair Rise and Run

Step-by-step formula for riser count, tread depth, total run, and stringer length — with IRC code check.

Stair Building Code Requirements (IRC R318.7)

2024 IRC residential stair code — risers, treads, width, headroom, handrails, guards and landings, plus winder, spiral and deck stairs.

How to Calculate Bricks for a Wall

Step-by-step: wall area, openings, waste factor, and mortar — with worked examples.

How Many Bricks Per Square Metre?

Brick counts per m² for standard, maxi and jumbo bricks, plus waste allowance and pallet guidance.

Standard Brick Sizes by Country

Work sizes, coordinating sizes, and bricks per m² for UK, US, Australia, Europe, and more.

Mortar Mix Ratio for Bricks: Type N, S, M

Type N, S, M and O mortar ratios and when to use each, plus UK designations (i)–(iv), the role of lime and how much mortar per m².

Single vs Double Leaf Brick Wall

Thickness, bricks per m², bonds, and safe garden wall heights by wind zone — with cavity wall comparison.

How Many Tiles Do I Need?

Step-by-step calculation including waste percentage by layout pattern, buying by the box, and common mistakes.

Tile Grout Gap Guide

Minimum grout joint width per ANSI A108.02, what lippage is, why grout is not a movement joint, and how joint width changes tile count.

How to Lay Tile Step by Step

Substrate prep, layout, thinset, setting, grouting, and sealing — the full process from bare floor to finished tile.

How to Calculate Paint Coverage

Wall area formula, coverage rates by paint type, and how many coats you actually need.

How to Calculate Wall Area for Painting

Measure walls, subtract openings, pick the right number of coats — with worked examples.

Cubic Yards to Cubic Meters

Exact conversion formula, quick reference tables, and tips for ordering ready-mix concrete in the right unit.

How to Calculate Fence Post Spacing

Post count formula, even spacing layout, burial depth, rails, and concrete per post.

How Much Mulch Do I Need?

Quick reference tables for mulch by area and depth, bags vs bulk comparison, and recommended depths by application.

How to Calculate Mulch

Step-by-step formula for cubic yards and bags — rectangular beds, circular beds, and waste allowance explained.

How to Calculate Drywall Sheets

Formula, worked examples, and waste factor guide for walls and ceiling.

Drywall Screw Spacing Guide

Code-maximum screw spacing for walls and ceilings (2024 IRC), screw types and lengths, and code-minimum screws per sheet.

How to Calculate Roof Pitch

Measure and calculate roof pitch from rise/run, convert to degrees, estimate rafter length, and check OSHA steep-roof limits.

Roof Pitch to Degrees Conversion Chart

Complete x:12 to degrees conversion table with pitch factor and 2024 IRC minimum pitch by roofing material.