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Flat & low-slopeFree roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
The Mercer Roofing Co Torrance Guarantee
When we say we stand behind our work in Torrance, we mean a specific thing: if the repair or installation we performed fails within 365 days of completion, we come back and make it right at no cost to you. That’s not a slogan. It’s the Mercer Roofing Co Torrance Done Right Promise, and it’s written into every job we do. You don’t have to argue with a dispatcher or navigate a claims department. You call (424) 435-5428, you talk to a live person, and we schedule the return visit. For a homeowner in Torrance, that’s what a guarantee should feel like: boringly reliable, the way a roof is supposed to be.
What’s Covered
The guarantee covers the work we performed and the way we performed it. Here’s exactly what that includes on every Torrance roofing job:
- Workmanship on every repair and installation. If our flashing, underlayment, decking repair, or shingle work fails within 365 days, we fix it without charging you for the second visit.
- The written repair guarantee included with every job. You’ll have the terms in writing before we start, so “guaranteed” never becomes a memory contest later.
- The replacement shingles and materials we install. We work with manufacturer-recognized brands including GAF, CertainTeed, Owens Corning, IKO, Atlas, Tamko, and Boral, and we handle any material defect claims under the manufacturer’s own terms.
- Cleanup and debris removal. Nails, torn shingles, old flashing, and packaging leave your property with our crew. If we miss something, call us and we’ll send someone back.
- The written price you agreed to. The number on your written estimate is the number on your invoice. No change orders, no “we found something else” surprises while the job is underway.
- The identity of the person at your door. Every Mercer Roofing Co Torrance technician is background-checked, identity-verified, and arrives in a clean marked uniform with a photo ID badge. You’ll know their name and see their photo before they ever ring the bell.
Styles & brands we work with






Our Satisfaction Promise
If something about the job isn’t right, the process is simple: you call us, a live person answers, and we make it right. There’s no escalation maze, no “we’ll get back to you within 48 hours” form, and no finger-pointing. You tell us what’s wrong, we send a technician to look at it, and if the issue falls within the 365-day window, the second visit is free. If it’s outside the window, we’ll still give you an honest assessment and a written price before any further work starts. That’s the standard Grant Whitlock, Owner of Mercer Roofing Co Torrance, holds the crew to on every roof in this city. In practice, it means we’d rather do the job correctly the first time than build a process for doing it twice, but the process exists and it’s simple because roofs fail on their own schedule and homeowners shouldn’t have to wait on hold to report it.
See the difference
Before
After
Before
After
Before
AfterLicensed & Insured Backing
A guarantee is only as strong as the company standing behind it. Mercer Roofing Co Torrance is a licensed and insured roofing contractor operating in Torrance, CA. That means the work on your roof is backed by the state’s licensing framework and by liability coverage, not just by a promise. If a worker is injured on your property or damage occurs during the job, you’re protected. We’re also part of the Threshold Group family, founded in 2000, and every technician is held to the Threshold Verified standard: background-checked, identity-verified, and dispatched with a photo ID badge. When you sign a contract with us, you’re not signing with a pickup truck and a business card. You’re signing with a company that has paper behind it, and that paper matters when things go wrong.
What Homeowners Ask Most About Our Guarantee
How long does the Mercer Roofing Co Torrance guarantee last?
Our Done Right Promise covers workmanship for 365 days from the date the job is completed. If the work isn’t right within that year, we make it right at no charge. Manufacturer warranties on shingles and materials operate separately and are governed by each manufacturer’s own published terms. We’ll explain exactly what applies to your roof before you sign anything. Call (424) 435-5428 if you want to walk through the particulars for your specific job.
Do I get the guarantee in writing?
Yes. Every repair includes a written guarantee, and every project starts with a written price. You’ll have both before any work begins. If you ever need to use the guarantee, you’ll reference the written terms, not a verbal recollection. That’s deliberate. It protects you and it keeps us honest.
Does the guarantee cover the shingles themselves?
Our 365-day guarantee covers our workmanship, including how the shingles were installed. The shingle products themselves are covered by the manufacturer’s warranty. We install GAF, CertainTeed, Owens Corning, IKO, Atlas, Tamko, and Boral products, all manufacturer-recognized brands, and we can walk you through what each manufacturer’s warranty covers before you commit. Call (424) 435-5428 and we’ll explain it in plain English.
Will the price change once work starts?
No. You receive a written price before any work starts, and that’s the price you pay. If we discover something during the job that genuinely needs attention, we’ll stop work, show you what we found, and provide a new written price before proceeding. You approve it or you don’t. Nothing happens without your sign-off, and no invoice line item will surprise you.
What if I’m not satisfied with the job?
Call us. A live person answers 24/7. We’ll send a technician to evaluate the work, and if it falls within our 365-day Done Right Promise, the fix is free. If you’re still not satisfied after that, we’ll keep working with you until the issue is resolved. That’s the standard we’re held to as a Threshold Group company. Call (424) 435-5428 and we’ll start the process immediately.
Written by Grant Whitlock, Owner at Mercer Roofing Co Torrance, serving Torrance, CA since 2000.