The first screen has to say old house, not new construction
A stock hero of a waterfront new build tells a Hyde Park homeowner they are on the wrong site, and they leave before reading a word.
Lead with work that looks like the visitor's house. A bungalow porch in South Tampa, a block wall in St. Petersburg, a casement in an older Ybor City building. Recognition does the persuading faster than any headline.
One line of text should say what you install and where you install it. A second should say what happens next, which is a measure, and roughly how it is booked. Both need to be visible before any scrolling on a phone.
Put a call action within thumb reach and keep it there as the visitor scrolls. Most of your traffic is on a phone in the room with the problem, and asking them to hunt for a number loses a share of them.
Say the unglamorous thing early: that you replace openings in older homes where sizes are frequently not standard. Every competitor claims quality. Almost none of them claim that.