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The Mercer Roofing Co Thousand Oaks Guarantee
When we repair or install a roof in Thousand Oaks, we put it in writing before the first shingle comes off the truck. That’s not a slogan; it’s how we’ve operated since 2000 as part of the Threshold Group family. Every job starts with a written price, and every repair carries a written guarantee, included at no extra cost. If the work isn’t right within 365 days, we make it right. That’s our 365-Day Done Right Promise, and it applies to every roof we touch, from a small flashing repair in Newbury Park to a full tear-off in Lynn Ranch. No fine print. No conditional language. No “we’ll take a look and see.” Just a promise with a calendar attached to it.
Grant Whitlock, Owner of Mercer Roofing Co Thousand Oaks, puts it plainly: a roofer who won’t write down what they’re promising isn’t promising much. We write it down. Every time.
What’s Covered
Don’t guess what your roof warranty includes. Here is exactly what our written guarantee covers on a Mercer Roofing Co Thousand Oaks job:
- Workmanship on every repair. If a repair we made fails within 365 days, we return and fix it at no charge, including a free second visit as part of the written guarantee.
- Written pricing before work begins. The price you approve is the price you pay. No surprise line items, no “we found something” change orders, no conditional pricing.
- Manufacturer-recognized materials. We install and repair GAF, CertainTeed, Owens Corning, IKO, Atlas, Tamko, and Boral roofing systems, so your manufacturer warranty stays valid and your roof stays recognized.
- Clean job site, every visit. Nails, tear-off debris, old flashing, and packaging leave with our crew, not in your Conejo Valley landscaping. We magnet-sweep the driveway and walk the property line before we call the job done.
- Photo-badged, background-checked technicians. Before any Mercer tech steps onto your Thousand Oaks property, you know their name and see their face. They ring the bell in a clean uniform and present a Threshold Verified photo ID badge at the door, every single visit, no exceptions.
- A live person on the phone. When you call about a repair or a leak, a real human being answers, 24/7. Not a voicemail box, not a callback form, not an auto-attendant maze. Especially when a roof leak shows up during a Santa Ana wind event at midnight, that matters in Ventura County.
Styles & brands we work with





Our Satisfaction Promise
If something doesn’t feel right about the work we did on your roof, call us. The process is simple. We come back and look at it. If our workmanship is the problem, we fix it under the 365-Day Done Right Promise, and the second visit is free. That’s not a courtesy or a favor; it’s the written guarantee included with every repair, and it has been since the day the company was founded in 2000.
Here is how it works in practice, the way it plays out for a Thousand Oaks homeowner. You notice a drip near the chimney after the first heavy winter rain, a few months after a repair. You call (805) 309-3314. A real person answers. We schedule a visit with a background-checked technician whose name and photo you receive before they arrive. They walk the roof, identify what’s happening, and if it traces back to our repair, we fix it at no cost under the guarantee. If it’s unrelated, we tell you exactly what we found, show you photos, and give you a written price before any new work starts. Either way, you’re not left guessing. Either way, you get a straight answer.
No arguing. No “prove it was us.” The guarantee exists, it’s written down, and it’s backed by Grant Whitlock and the Threshold Standard that every Mercer Roofing location is contractually held to.
See the difference
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AfterLicensed & Insured Backing
A written guarantee is only as strong as the company standing behind it. Mercer Roofing Co Thousand Oaks is licensed and insured, which means the promises in our paperwork are backed by more than good intentions. If our crew causes damage to your property, you’re protected. If a technician is injured on your roof, you’re protected. Insurance isn’t a nice-to-have in roofing; it’s the structural support underneath every guarantee we write.
Every Mercer technician is background-checked, identity-verified, and dispatched under the Threshold Group quality framework. That means the person on your roof in Thousand Oaks is a vetted professional who arrives in a clean, marked uniform with a photo ID badge, not a subcontractor you’ve never heard of and will never see again. The Threshold Standard is the operating requirement for every independently owned Mercer location, and it stays in place on every single visit.
Why a Written Guarantee Matters in Thousand Oaks
Thousand Oaks roofs take a specific kind of beating. Intense summer sun and UV exposure break down asphalt shingles faster here than in coastal microclimates just twenty minutes away. Santa Ana winds in the fall can lift loose shingles and peel back flashing along ridges and valleys. Winter brings concentrated periods of rain that find every weakness in a roof system all at once. A roof in the Conejo Valley is not the same as a roof in Camarillo or Moorpark, and a guarantee that matters here has to account for that cycle of heat, wind, and rain.
That’s why we’re specific. The 365-Day Done Right Promise covers a full annual weather cycle, from the first hot Santa Ana to the last spring rain. If a repair can survive that year in Thousand Oaks, it can survive most anything. And if it doesn’t, we come back. Written guarantee, free second visit, no debate.
Call (805) 309-3314 to schedule your free estimate. We’ll send a background-checked, photo-badged Mercer technician to your door, put the price in writing, and stand behind the work in writing too. That’s the whole deal. It’s how roofing should work.
Written by Grant Whitlock, Owner at Mercer Roofing Co Thousand Oaks, serving Thousand Oaks since 2000.