🛠️ Commercial-Grade Flat Roofing— Built for Your Home.

We Bring the Strength & Durability of Commercial Roofing to Residential Flat Roofs for Long-Lasting, Worry-Free Protection.

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🏠 Flat Roofing

At Grandmark, we apply the same high standards, materials, and techniques used in commercial roofing to your residential flat roof. Whether it’s for a garage, addition, modern home, or patio, you’ll get professional-grade durability designed to outlast ordinary roofing.

✅ Free Flat Roofing Consultation
✅ Commercial-Grade Materials & Craftsmanship
✅ Full Warranty on Labor & Materials

Our Promise: You’ll get a stronger, tougher, more reliable roof—installed by experts who treat your home like a business investment.

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See the Quality

Browse trough our gallery to see the exeptional craftsmanship our our team, bringing protection, comfort and energy savings.

You deserve the absolute BEST!

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Your Flat Roofing Experts

★★★★★

We thought we needed a whole new roof. Grandmark came out, inspected everything, and told us it was a minor repair. Saved us thousands and did an excellent job.

★★★★★

Quick, clean, professional. They fixed a leak that two other companies couldn’t figure out.

★★★★★

Our experience was wonderful. David was professional and provided great insight to the situation with our insurance company. He was on time and efficient. We appreciate his honesty and willingness to work with us! We will use this service again!

★★★★★

I had a wonderful experience working with Grandmark Roofing Company. From beginning to end, everyone I spoke to was kind and helpful. The communication was excellent!! Moises Ortiz and his crew were absolutely wonderful to work with. They were on time, did a thorough job and were meticulous with their clean up. It’s refreshing working with people who care about the customer and enjoy what they do. Thank you Moises and crew!

🔍 Our Low Slope Roofing Services

Flat Roof Installation
We install TPO, modified bitumen, PVC, and built-up systems using commercial-grade membranes and coatings for superior strength.
Flat Roof Replacement
Upgrade from worn-out or leaking materials to a flat roof built for long-term performance.
Flat Roof Repairs
We apply commercial-grade solutions to fix leaks, punctures, ponding water, and surface damage.
Flat Roof Maintenance & Inspections
Prevent issues before they start with professional inspections and proactive care—just like a commercial building.

🏡 Why Choose Flat Roofing?

Engineered to Last
We use tough materials designed for commercial rooftops—adapted for your home.
Energy-Efficient Options
Reflective membranes lower cooling costs and improve indoor comfort.
Sleek, Modern Look
Flat roofs pair beautifully with contemporary home designs.
Maximized Usable Space
Create rooftop patios, solar panel areas, or storage space.

🛡️ Why Choose Grandmark Roofing

✅ We Bring Commercial-Grade Roofing to Your Home
✅ Certified Flat Roofing Specialists
✅ Premium Materials from Leading Brands
✅ Full Warranty on Work & Materials
✅ Trusted Locally with 5-Star Reviews

📞 Upgrade to a Flat Roof Built Like a Commercial Roof

Give your home the toughness, durability, and professional quality of commercial roofing—designed for residential living. Contact Grandmark Roofing Company today for your free flat roofing consultation.