Installing replacement windows can be challenging for beginners, as it requires accurate measurements, proper sealing, and removal of the old window. A professional installer ensures that the window is installed correctly and efficiently, avoiding issues like drafts and leaks that can result from improper installation.

While it's possible to install replacement windows on your own, the process requires skill and experience to ensure a proper fit and seal. Hiring a professional is often recommended, as they can complete the job more quickly and with fewer mistakes, ensuring the windows function optimally for energy efficiency and comfort.