FUNDAMENTALS OF ROOF CONSTRUCTION

A roof can pass every individual check and still fail as a system.

Roof construction is usually learned in fragments. Structural courses treat a rafter as a beam. Building science covers insulation and vapor. Trade training teaches the order of work. But a roof does not fail along those lines. A rafter that is strong in bending can still push a wall out of plumb. A correctly seamed membrane can peel back when fastened at the wrong spacing. A well-insulated attic can grow ice dams and mold when it is poorly ventilated or air-sealed.

This book treats the roof as one connected system: structure, weather protection, thermal and moisture control, drainage, and the construction process. Instead of asking you to memorize steps, it explains the purpose behind each one, so you can see how a decision in one layer affects the others and adapt when field conditions differ from the drawings.

What you will be able to do:

• Trace dead, snow, wind, and rain loads from the roof surface to the foundation, and see how they are combined for design.
• Understand how rafters, trusses, sheathing, and connections work together, including thrust, bracing, and continuous uplift load paths.
• Recognize the physical ways water enters a roof and how laps, underlayments, and flashings defeat them.
• Compare steep-slope coverings and low-slope membrane systems, with installation explained by purpose.
• Evaluate insulation, ventilation, and moisture control, including the causes of ice dams.
• Plan safer, better-sequenced work with fall-protection principles and quality-control hold points.
• Practice with worked examples that carry units through every step, plus problems with answer keys.

Fourteen chapters move from roof geometry and loads through framing, envelope, drainage, jobsite practice, inspection, and reroofing.

Who it is for: upper-level students in construction management, civil engineering, architectural engineering, and building technology, and early-career engineers, inspectors, estimators, project managers, and experienced tradespeople moving into supervisory or design roles. Algebra, trigonometry, and introductory statistics are the mathematics assumed. The book teaches principles; it does not replace local code requirements, manufacturer instructions, or a licensed design professional.

Open this book and begin building the understanding needed to design, build, inspect, and maintain roofs that stay dry, stay attached, and stay safe to work on.