After selling Kelly Roofing to a private equity-backed organization, Ken eventually left the company he had spent years building. Changes followed, the business struggled, and this summer Ken had the opportunity to buy it back.

When I talked with Ken about what happened and what comes next, one phrase stuck with me: “founder's mentality.”

It got me thinking about something much bigger than one company.  Private equity and outside investment have brought tremendous amounts of capital into roofing. In many cases, that's been a good thing. We've seen companies grow, owners create wealth, employees gain new opportunities and businesses get access to resources they never had before.

We've also seen what can happen when new ownership believes the people, culture and relationships that built a successful company can easily be replaced. They can't.

You can bring in incredibly talented executives from investment banking, big tech or some of the largest corporations in America. They may know finance, technology, operations and scale better than anyone in the room. But they don't automatically know roofing or the people and relationships that were the building blocks. More importantly, they don't automatically inherit the trust that took years to build.

Roofing is an industry of deep relationships. People know each other's families. They see each other at trade shows and association meetings year after year. They've worked through recessions, storms and plenty of difficult times together. That history matters.

That's where I think the founder's mentality becomes so important. A founder doesn't just know how the company operates. He or she often knows why it operates that way. They know which employee holds something together that doesn't appear on an organizational chart. They know which customer relationship needs a phone call instead of an email. They know which handshake from 15 years ago still means something today.

None of this means founders are always right. And it certainly doesn't mean private equity or outside leadership can't succeed in roofing. Many are succeeding. But there is a lesson here.

If you're entering this industry, don't underestimate the value of the relationships that were there before you arrived. Don't assume a successful playbook from another industry can simply be dropped into roofing. And don't start tearing down what looks inefficient until you understand why it was built that way in the first place.

Capital matters. Technology matters. Efficiency matters. Scale matters.

But relationships still win.

Ken Kelly's story reminded me that you can buy a company, its trucks, its contracts, its brand and its customer list.

What you can't buy overnight is the trust that built it.

You have to earn that.