Hire a professional for flooring installation if your subfloor is uneven beyond three sixteenths of an inch, your home has complex hallways or layouts, or you face tight deadlines. Professionals handle difficult levelling, transitions, and intricate doorways efficiently, ensuring quality and speed. If you have a simple floor plan and spare a few weekends, DIY saves money. Splitting the project by DIY demolition and baseboard work while hiring pros for installation can also balance cost and quality.