To raise a roof, professionals and contractors use materials like plywood, framing lumber, insulation, flashing, and gutters, along with tools such as ladders, scaffolding, and power tools. They follow building codes and zoning laws while utilizing techniques like gable roof raising and hip roof raising. Safety measures like fall protection gear and proper equipment handling are paramount. Planning involves estimating time and cost, considering financing, and collaborating with homeowners, inspectors, and related entities.