Roof Installation & Solar Restoration Experts
We don't just change shingles. We correct structural issues, upgrade ventilation, and handle your solar panel removal & reinstall—all in one seamless project.
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Book Your X-Ray Inspection
Stop the leak before it spreads. Schedule your diagnostic today for a precise, honest quote.
We Fix the Problems You Can't See
1,119+ Google Reviews
4.8
A new roof is useless if the wood underneath is rotting. Unlike "cover-up" contractors, Grandmark performs a full structural rehabilitation before a single new shingle goes on.
The Only "Certified-Dry" Roof Installation in California
Most contractors hammer the last shingle and hand you a bill. They hope your roof replacement is watertight. At Grandmark, we don't hope—we verify. Once your roof installation is complete, we perform a Final X-Ray Scan of the critical flashings and penetrations. We provide you with a thermal report proving that your investment is 100% sealed from Day One. It’s not just a warranty; it’s scientific proof that your new roof is perfect.
Roofing Materials Engineered for Valley Heat
A roof installation faces a brutal test: scorching UV rays in August and heavy downpours in January. We install materials specifically rated for the USA climate. Cool-Roof Shingle Installation: Reflects up to 20% of solar heat. Our asphalt shingle installations use heavy-duty architectural materials that resist wind uplift and granule loss. Concrete & Clay Tile Roofs: The gold standard for durability. Our tile roof installation process involves a "lift and reset" technique where the underlayment is double-reinforced for decades of protection. Flat & TPO Roofing: Perfect for modern homes. We specialize in flat roof installation using heat-welded seams to create a monolithic sheet that water cannot penetrate.
A Cleaner, Faster Roof Replacement Process
1. The "Catch-All" Tear Off: We drape your home’s perimeter. Old shingles go directly into our dumpsters, ensuring a clean roof replacement site.
Decking Rehabilitation: We never cover up rot. Before the new roof installation begins, we inspect the plywood decking to ensure a solid foundation.
A great shingle installed wrong will fail. Our roof installers are trained on specific nail-placement patterns that maximize wind resistance.
The Thermal Sign-Off: Before we invoice, we scan. We ensure every part of your roof installation is thermally sealed.
The Grandmark Roofing System
We don't just nail down shingles. We install a complete, integrated protection system designed to withstand California’s heat and wind. Every roof is verified by X-Ray diagnostics to ensure no moisture is trapped underneath.
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130 MPH Wind Rating
High-performance shingles engineered to withstand severe storms and high winds.
Cool Roof Technology
Reflective granules reduce attic temperature, lowering your AC bills in the summer.
50-Year Warranty
Backed by the Golden Pledge — covering both materials and labor for decades.
Reviews
See Why Neighbors Trust Grandmark
With 1,119+ 5-Star Reviews, we are the Central Valley's most trusted roofing team. We don't pressure you—we show you the X-Ray facts so you can make the right decision for your home.
Sarah J., Fresno
Homeowner
Paul Adler., Sacramento
Homeowner
Nick Pistoresi., Visalia
Homeowner
Frequently Asked Questions
How do I know if I need a repair or a full roof installation?
We never guess. We perform an X-Ray diagnostic first. If the thermal scan shows widespread saturation or balding shingles, a full roof installation is the smarter financial decision.
How long does a roof installation take?
Most residential roof installations in the Central Valley are completed in 2 to 3 days. We watch the weather closely to ensure your home is protected throughout the replacement process.
Will you provide proof of the damage?
Absolutely. You won't just take our word for it. We provide a digital report with thermal "Before" photos showing the hidden moisture and "After" photos proving the leak is gone. You see exactly what you are paying for.
Do you handle permits for the roof installation?
Yes. Grandmark handles the entire "red tape" process. We pull the city permits and schedule inspections for your roof replacement, ensuring everything meets California Title 24 Energy Code.
Will a new roof installation lower my energy bills?
Absolutely. A modern Cool Roof installation with proper ventilation can drop your attic temperature by 20-30 degrees, significantly reducing your HVAC costs.