The person searching for you sits on a board, not on a ladder
Your organic buyer is a volunteer treasurer, a licensed manager or a consulting engineer, and none of them search the way a homeowner does.
A homeowner with a leak searches once and calls three numbers. A board searches for weeks, as a group, and the vocabulary shifts as the group learns: from "water coming through top floor ceiling" to "single ply versus modified bitumen" to "roof replacement bid specification for a condominium association".
Each of those stages wants a different page. Early on the group is diagnosing. In the middle they are comparing systems and arguing about recover versus tear-off. At the end they are checking whether you can be hired at all: license, bond, insurance limits, references on occupied buildings.
Write for the stage rather than the keyword. A page that pushes for a signed contract at somebody still asking why the roof holds water two days after rain will lose to the page that simply explains ponding and then says what usually happens next.
Search volume on these terms looks discouraging on a spreadsheet. Ignore it. A handful of searches a month from managers who each hold a portfolio of buildings is a better asset than a flood of residential traffic you have no crews to serve.