Tired of roofers who ghost you mid-job? Grandmark has served Modesto for 25+ years — licensed, bonded, and we finish what we start. $0 down financing available.
💰 $0 Down · 0% Interest · 18 Months — Most Modesto homeowners qualify same day. Don't wait on a leaking roof.
Why Grandmark
We Show Up. We Finish. We Guarantee It.
The #1 complaint about Modesto roofers? They take the deposit and disappear. Grandmark is licensed, local, and we back every job with a written warranty.
We Actually Show Up
We confirm every appointment, arrive on time, and keep you updated. No ghosting, no excuses — professional service from start to finish.
Built for Stanislaus Heat
105°+ summers, relentless UV — we install systems engineered for Modesto's climate. Materials that hold up where others fail.
$0 Down Financing
18 months at 0% interest. Most Modesto homeowners qualify on the spot.
Licensed, Bonded & Insured
CSLB #1030917. We pull permits, follow code, and carry full insurance. Always verify your contractor's license before signing anything.
Real Results
See the Grandmark Difference
Actual work on a Modesto home — diagnosed right, fixed permanently.
Real Modesto job — diagnosed and fixed right the first time. No patches. No callbacks.
Real Reviews
Trusted by Modesto Homeowners
Verified Google reviews from your neighbors.
4.8
★★★★★1,200+ ReviewsVerified · Google
★★★★★
"Rob was very knowledgeable, informative, and respectful. They did a great job and were completely professional from start to finish."
— Adan R., Modesto, CA
✓ Verified Google Review
★★★★★
"Quick response time and professional service. My heater stopped working and they showed up and had it fixed in about an hour and a half. Bill and David are very professional."
— Marvin H., Modesto, CA
✓ Verified Google Review
★★★★★
"They did a great job and were completely professional. I will be using them from now on for all my roofing needs."
— Juan M., Modesto, CA
✓ Verified Google Review
Our Services
Everything Your Roof Needs
From emergency repairs to full replacements — done right the first time.
Roof Repair
We identify the real cause of leaks — not just visible damage. System-based approach for permanent fixes.
Roof Replacement
Full system replacement with GAF-certified materials — engineered for Modesto's extreme climate.
Commercial Roofing
TPO, flat roofs, and complete commercial systems for businesses across Modesto.
🏷 18 Mo · $0 Down · $0 Interest Financing Available
Available 24/7 · CSLB #1030917 · 1101 McHenry Ave STE 100, Modesto, CA 95350
Roofing Services in Modesto
Everything your roof needs — done right the first time.
Roof Repair
We identify the real cause of leaks — not just visible damage. Our system-based approach ensures repairs that don't come back. We inspect the roof, attic, ventilation, and structure to find the root problem.
Full system replacement with GAF-certified materials. We design roofing systems for Central Valley conditions — extreme heat, UV exposure, and seasonal shifts. Completed in 1–3 days with full cleanup.
TPO, flat roofs, and complete commercial systems for businesses across Modesto. We understand how your roof impacts HVAC performance and long-term operating costs.
Thorough, no-obligation inspection of your roof, attic, ventilation, and structure. We document everything and give you a clear, honest recommendation with zero pressure.
Expert installation of architectural shingles, 3-tab, and premium options. We match the right shingle to your home, budget, and Modesto's specific climate demands.
Beautiful, long-lasting tile and metal roofing systems built to handle Modesto's heat. Premium materials with superior warranties and curb appeal that lasts decades.
A real Modesto-based team member answers. Same-day inspection available.
2
Complete Inspection
Roof, attic, ventilation, structure — we find the real cause, not just visible damage.
3
Honest Plan
We tell you exactly what's needed. Repair or replacement — what actually solves the problem.
4
Done Right. On Time.
Most Modesto jobs complete in 1–3 days. Full cleanup. Backed by our workmanship warranty.
FAQ
Common Questions
Do I need repair or full replacement?
We do a complete system assessment to tell you exactly what's needed. We recommend what actually solves the problem long-term, not what costs more.
Why do my repairs keep coming back?
Because most roofers only fix what they see. Hidden issues — poor ventilation, attic moisture, damaged underlayment — are the real cause. We fix the root problem.
How long does a replacement take?
Most residential replacements complete in 1–3 days. We prioritize doing it right — not just fast.
Do you offer a warranty?
Yes — every job is backed by our workmanship warranty. GAF-certified materials also come with manufacturer warranties up to 50 years.
Tell us about your roofing needs. We'll schedule your free inspection same-day.
2
Get Your Estimate
We provide a clear, honest quote. Our team walks you through your financing options on the spot.
3
Approve & We Start
Once approved — usually same day — we schedule your job immediately. No waiting, no runaround.
FAQ
Financing Questions
Who qualifies for financing?
Most homeowners in Modesto qualify. We work with multiple lenders to find options for a wide range of credit profiles. Apply with no obligation.
Is there a credit check?
A soft credit check may be required for some plans. This does not affect your credit score. We'll explain all terms clearly before you commit to anything.
Can I pay off early?
Yes — all our financing plans allow early payoff with no penalties. Pay on your schedule.
What if I'm not approved?
We'll work with you to find alternatives. We believe everyone deserves a safe roof over their head — call us and let's figure it out together.
Apply Today — Takes 5 Minutes
Call us and we'll walk you through your financing options right now.
🏷 18 Mo · $0 Down · $0 Interest · Most Qualify Same Day
About Grandmark Roofing
Modesto's most trusted roofing contractor — for 25+ years.
Our Story
Built on Honesty. Backed by Results.
Grandmark Roofing was built on a simple belief: every homeowner deserves a roofing contractor who tells the truth.
For over 25 years, we've served homeowners across Modesto and Stanislaus County. We built Grandmark because too many homeowners were getting burned by contractors who take deposits and vanish. Our team of GAF-certified professionals approaches every job the same way: complete system assessment, honest recommendation, and work that stands behind our warranty.
Fully licensed (CSLB #1030917), bonded, and insured. Every job includes a written warranty. In a market full of unreliable contractors, Grandmark is the name Modesto homeowners trust.
25+
Years Experience
2,000+
Roofs Installed
4.8★
Google Rating
Our Values
What Sets Us Apart
Honest Diagnosis
We tell you exactly what's wrong — even if it means a smaller job for us.
GAF Certified Quality
Factory-certified materials and installation — backed by manufacturer warranties.
Local & Available 24/7
We're based in Modesto. Real people answer, day or night.
Flexible Financing
$0 down, 0% interest options so cost never stops you from getting a safe roof.
Our Team
Certified Professionals. Modesto Locals.
Your roof gets our own A-team — not a subcontractor. Every technician is trained, GAF-certified, and background-checked. We take pride in showing up on time, communicating clearly, and leaving your property cleaner than we found it.
You'll recognize the Grandmark truck in your Modesto neighborhood.
Service Areas
Serving Modesto & Central California
📍 Fresno
Clovis
Madera
Sanger
Selma
Reedley
Work With Modesto's Best
Call us today — 24/7, no obligation, free estimate.
Most Modesto roofers patch the visible damage and leave. Within months, the leak returns — because the root cause was never found. We do it differently.
Complete Diagnosis
We inspect the full system — roof surface, underlayment, attic, ventilation, flashing, and gutters — to find the actual cause of every leak.
Permanent Fix
We use GAF-certified materials engineered for Central Valley heat. No cheap patches — every repair is built to last.
Same-Day Response
We're Modesto-based. When you call, a real team member answers and dispatches fast — no waiting, no call centers.
0% Financing Available
Don't delay repairs because of cost. 18 months at $0 down, $0 interest. Most Modesto homeowners qualify same day.
What We Repair
Every Type of Roof Problem — Solved
From minor leaks to major storm damage, we handle it all across Modesto and the Central Valley.
Leak Repair
Persistent or sudden leaks — we trace them to the source and seal them permanently, no matter how hidden.
Damaged Shingles
Wind, heat, and age crack and curl shingles. We match and replace them to restore full protection.
Flashing Repair
Faulty flashing around chimneys, vents, and skylights is the #1 source of hidden leaks. We fix it right.
Storm Damage
Hail, wind, and heavy rain cause damage that isn't always visible. We inspect thoroughly and document everything for your insurance claim.
Ventilation Issues
Poor attic ventilation causes premature aging, moisture buildup, and skyrocketing energy bills. We fix the root problem.
Flat Roof Repair
Blistering, ponding water, and membrane tears on flat roofs repaired with commercial-grade materials.
FAQ
Roof Repair Questions
How do I know if I need repair or full replacement?
We'll tell you honestly after a full inspection. If repair makes financial sense, we'll repair it. We don't push replacements to make more money.
How fast can you come out?
We offer same-day inspections for Modesto area homeowners. Call us at (209) 219-2438 and we'll get someone out fast.
Does my homeowner's insurance cover roof repair?
Storm and hail damage is typically covered. We document everything thoroughly and can work directly with your insurance adjuster.
Do you warranty your repairs?
Yes. Every repair comes with our workmanship warranty. We stand behind what we do — if it comes back, so do we.
Fix It Right. Fix It Once. Modesto's Trusted Roofer.
Call now — same-day response, free estimate, no obligation.
We'll always tell you honestly. But when a roof is past its life, replacement is the smarter investment — and we make it painless for Modesto homeowners.
GAF Certified Materials
We install only factory-certified GAF roofing systems — the highest standard available. Built to handle 110°+ Central Valley summers for decades.
1–3 Day Completion
Most Modesto residential replacements complete in 1–3 days. We move fast without cutting corners — full cleanup every day.
Up to 50-Year Warranty
GAF manufacturer warranties up to 50 years, plus our own workmanship warranty. The most comprehensive coverage available.
$0 Down Financing
A full replacement is a big investment. We make it manageable — 18 months at 0% interest, most Modesto homeowners qualify same day.
Roofing Systems
Choose the Right Roof for Your Home
We help every Modesto homeowner pick the right material for their budget, style, and climate needs.
Architectural Shingles
The most popular choice for Modesto homes — great durability, beautiful appearance, and excellent value. 30-year warranties standard.
Tile Roofing
Clay and concrete tile — timeless look, exceptional longevity (50+ years), and superior heat resistance for Central Valley summers.
Metal Roofing
Energy-efficient, fire-resistant, and built to last 40–70 years. Increasingly popular in Modesto for its performance in extreme heat.
Premium Shingles
Designer and impact-resistant options for homeowners who want top-tier performance and curb appeal. May qualify for insurance discounts.
Our Process
How a Grandmark Replacement Works
1
Free Inspection & Honest Quote
We inspect everything and give you a clear, itemized quote. No surprises, no pressure.
2
Choose Your System
We walk you through material options that fit your budget, style, and Modesto's climate. We recommend — you decide.
3
Full Installation in 1–3 Days
Our certified crew arrives on time, installs your new roof system completely, and does a thorough cleanup daily.
4
Final Walkthrough & Warranty
We walk the job with you, answer every question, and hand you your warranty documents before we leave.
FAQ
Replacement Questions
How long does a full replacement take?
Most residential replacements in Modesto take 1–3 days depending on size and complexity. We keep you informed throughout.
Do I need to be home during installation?
Not necessarily. We just need access to your property. We'll coordinate everything with you before we start.
Will you haul away my old roof?
Yes — complete tear-off and disposal is included. We leave your property cleaner than we found it.
Can I finance the replacement?
Absolutely. We offer 18 months at $0 down and $0 interest. Most Modesto homeowners qualify same day.
New Roof. Done Right. Serving Modesto for 25+ Years.
A commercial roof failure isn't just a repair bill — it's business interruption, damaged inventory, liability risk. We treat your roof like the business asset it is.
Minimal Business Disruption
We schedule around your operations. Night work, weekend work, phased installation — whatever it takes to keep your business running.
OSHA Compliant
Full safety protocols, proper insurance, and CSLB licensed. We protect you from liability on every commercial job.
Energy Efficiency Focus
The right commercial roof system dramatically reduces your HVAC load. We factor energy performance into every recommendation.
Flexible Commercial Financing
Custom financing plans designed for business cash flow. Don't let budget timing delay protecting your most important asset.
Commercial Systems
Systems We Install & Service
Every commercial building in Modesto has different needs — we spec the right system for your building, budget, and usage.
TPO Roofing
The most popular commercial choice — highly reflective, energy-efficient, and excellent performance in Modesto's heat. Great value for most commercial buildings.
Flat Roof Systems
Modified bitumen, built-up roofing, and EPDM for low-slope and flat commercial roofs. Durable, watertight, and built for the long term.
Commercial Metal Roofing
Standing seam and exposed fastener metal systems for warehouses, industrial, and retail. Outstanding longevity and minimal maintenance.
Preventive Maintenance
Scheduled inspections and maintenance programs that extend roof life and prevent expensive emergency repairs. Ask about our maintenance contracts.
FAQ
Commercial Roofing Questions
How do you minimize disruption to my business?
We plan everything around your schedule. We can work nights, weekends, or in phases to keep your operations running without interruption.
Do you handle permits?
Yes. We pull all required permits for commercial jobs in Modesto and ensure full code compliance. You don't have to deal with the paperwork.
Can you work with our property manager or building owner?
Absolutely. We're experienced coordinating with property managers, building owners, tenants, and HOAs. We communicate clearly with all stakeholders.
Do you offer maintenance contracts?
Yes — regular inspections and maintenance programs are available. Preventive maintenance is the most cost-effective way to protect a commercial roof investment.
Protect Your Modesto Business
Free commercial estimate — we come to you, assess your building, and give you a clear plan.
