Speed and mobile come first
The majority of homeowners searching for a roofer are on their phones, often in a hurry after a leak or storm. If your site takes more than a few seconds to load or is awkward to use on mobile, many of them leave before they ever see your work. Core Web Vitals — Google's measures of loading, interactivity, and visual stability — affect both user experience and search rankings.
Prioritize a fast, lightweight build and a layout designed for a thumb on a small screen. Every second and every extra tap costs you jobs.