How Mercer Roofing Co Thousand Oaks Was Born in Thousand Oaks
We didn’t create Mercer Roofing. The brand has been around since 2000, built on a simple idea: a roofer who badges in at the door, sends you a name and photo before showing up, and puts the price in writing before the first shingle comes off. That standard existed long before we brought it to Thousand Oaks. But the decision to open this branch, to plant that standard in this particular city, that was personal.
Grant Whitlock had worked roofing jobs across Southern California for years before this location opened. He saw the same pattern repeat itself in neighborhood after neighborhood: homeowners who paid too much for too little, crews that showed up late in unmarked trucks, verbal estimates that ballooned once the tear-off started. One job in particular stuck with him. A homeowner in Thousand Oaks had been told by another outfit that her roof needed a full replacement. She paid for it. Two years later, the flashing failed around her chimney and water leaked into a bedroom. The original contractor wouldn’t return her calls. Grant walked that roof, saw the rushed install, the wrong underlayment, the corners cut where nobody would notice until the rain came. He repaired what he could and explained, plainly, what had gone wrong. She wasn’t angry at the roof. She was angry that nobody had told her the truth.
That was the moment Grant knew Thousand Oaks needed what Mercer Roofing stood for. Not a new company. A new standard for this city. When the opportunity came to open a Mercer Roofing branch serving Thousand Oaks, Camarillo, Moorpark, Westlake Village, and the surrounding Conejo Valley communities, he took it. This location exists because homeowners here deserve a roofer who tells them exactly who is coming, proves it at the door, and stands behind the work.
Grant Whitlock’s Personal Connection to the Roofing Trade
Grant’s first roof was not a job. It was a favor. Before he ever thought about roofing as a career, he helped a neighbor patch a leaking section of asphalt shingle on a Thousand Oaks afternoon when the temperature sat somewhere north of ninety degrees. The heat came off the decking in waves. The granules stuck to his forearms. He remembers the smell of hot tar and the weight of the shingle bundle, the way the nails rang when they hit true, and the quiet satisfaction when the patch held through the next rain. It was hot, dirty, physically demanding work. He couldn’t stop thinking about it.
He spent the next decade learning the trade from the ground up. He worked under journeyman roofers who could read a roof like a doctor reads a chart: the slope, the exposure, the way water moves, the places where failure starts before you can see it. He learned to listen to a roof. The creak of decking that’s seen too much moisture. The soft give of a rafter that’s compromised. The difference between a tile that’s cracked from impact and one that’s failed from age. Those years taught him that roofing is not just installation. It’s diagnosis. It’s understanding how a house breathes, how heat and cold and wind and rain work against a structure over time.
What keeps him in the trade after all these years isn’t the craft alone. It’s the people. Roofing is one of the few trades where the customer almost never sees the finished product up close. They trust you. They hand you the thing that keeps their family dry and their home safe, and they trust you to do it right. Grant has never stopped feeling the weight of that trust. If he weren’t roofing, he’d probably be teaching. He likes explaining things simply, walking a homeowner through what’s wrong and what the options are without jargon or pressure. In a lot of ways, that’s what he does every day.
Meet Grant Whitlock – The Person Behind Every Job
Grant Whitlock is the Owner and Founder of this Mercer Roofing branch, leading the team that serves Thousand Oaks and the surrounding communities. He came up through the trade the hard way, learning on actual roofs with actual consequences for getting it wrong. That experience shapes how he runs this location. He treats every roof like it belongs to someone he knows, because in a city the size of Thousand Oaks, it often does.
Grant holds his crew to what he calls the dinner table test: could each of them sit down at a customer’s dinner table after the job and look them in the eye? If the answer is no, the job isn’t finished. That’s the bar. He’d rather lose a bid than win one with a lowered standard, and he’s walked away from work that couldn’t be done right at an honest price. When he’s not on a roof or in the office, Grant is usually outside: hiking the trails in Wildwood, taking his time at the Agoura Hills farmers market, or restoring furniture in his garage. He is personally committed to every roof this team touches, and if something isn’t right, he wants to hear about it.
Our Promise to Thousand Oaks Homeowners
We run this branch on a few commitments that don’t bend. First, every job gets a written line-item price before any work starts. You’ll know what you’re paying and why. No vague allowances. No surprise change orders at the end. Second, we use quality materials from manufacturers like GAF, Atlas, and Tamko, and we install them according to the manufacturer’s specifications and local Thousand Oaks code requirements. Third, we stand behind our work with the Threshold Standard: every technician is background-checked and identity-verified, their name and photo are sent to you before the visit, they show a photo ID badge at the door, they arrive in clean marked uniforms, and the price is in writing before we begin. If anyone arrives who you were not told to expect, that visit is on us and we make it right.
Our Credentials
Hiring a roofer means inviting someone onto and into your home. Here’s what you should expect from this team, and what we require of every pro working under our name:
- State-licensed: Every pro working under the Mercer Roofing name is required to hold the license their state requires. In California, that means C-39 roofing licensure. We’re glad to show our license documentation during your estimate.
- Insured & bonded: Crews are required to carry the insurance and bond coverage their state and our standards require. If you’d like a certificate of insurance for your job, ask during the estimate and we’ll provide it.
- Long local experience: Grant and his crew have spent years working on Conejo Valley roofs: tile in Westlake Village, wood shake in Oak Park, flat roofs in Simi Valley, ocean-air corrosion along the Malibu coast. The local building department, the local code amendments, and the way our microclimates age a roof are all second nature to this team.
- Strong local reputation: Homeowners in Thousand Oaks, Moorpark, Camarillo, and Agoura Hills keep calling us back and sending neighbors our way. We’d rather let the work speak than list numbers.
Those requirements matter because the person on your roof matters. A license means the roofer has passed the state’s examination and knows the codes that govern your home. Insurance and bonding mean you are not on the hook if something goes wrong. And local experience means the estimate you get reflects Thousand Oaks realities: our rainy seasons, our wildfire zone defensible-space rules, our particular mix of home styles from mid-century ranchers to 1990s Mediterranean builds.
Rooted in Thousand Oaks
Thousand Oaks isn’t just where we work. It’s where Grant lives, where he shops, where he gets stuck in the same 101 traffic as everyone else. He knows the difference between a Newbury Park roof and a Westlake Village roof because he’s spent years on both. The team serves the whole Conejo Valley: Camarillo and Moorpark to the west, Malibu over the pass, Simi Valley and Calabasas, West Hills, Canoga Park, Topanga. When you call, you’re calling people who know this community, not a brand that’s guessing from a map.
Written by Grant Whitlock, Owner at Mercer Roofing Co Thousand Oaks, serving Thousand Oaks since 2000.