Roofing & HVAC Experts Serving Central California
Advanced Roof & HVAC Inspections, Repairs and Installations
Advanced inspection technology helps our team find the real source of leaks, roof damage, and HVAC system issues so repairs are done right the first time.
• Precision Diagnostics
• In-House Experts
• Complete Solutions
NEARLY 30 YEARS OF IN-HOUSE EXPERTISE
No Guesswork. Just Real Answers.
Many contractors only see part of the problem. Roofing issues can affect HVAC systems, solar installations can impact roof structure, and insulation problems can influence both.
Because Grandmark Service Company brings multiple licensed trades together under one roof, we’re able to diagnose problems more accurately and deliver solutions that actually fix the root cause — not just the symptoms.
Our customers get clear answers, quality workmanship, and reliable results every time.
- Licensed & Insured
- Serving California Since 1995
- 1,200+ Verified Reviews
Structural Restoration & Integrated Solutions
Roofing
Protect your property with professional roof repair, roof replacement, inspections, and complete roofing system installations designed for durability and long-term performance.
HVAC Services
Reliable air conditioning repair, installation, and system replacements
designed to improve comfort, efficiency, and long-term system performance.
Trusted by Homeowners Across California
Real reviews from customers who trusted Grandmark for roofing and HVAC services.
Grandmark did an amazing job fixing our Roof and Duct work we needed done. Greatly appreciate them and recommend them 10/10 ! Thank you for everything making our home look great
This was our second time using Grandmark for a roof repair. They were able to fit us in very quickly to beat an upcoming rainstorm. Communication was excellent throughout the process, and the crew was courteous and left the work area spotless.
Romelo did a great inspection on my HVAC. He explained the findings to me from the pictures and video. Tune up price is reasonable.
Excellent service from financing to completion of the project. Angel and Antonio are efficient with a great work ethic. Antonio the project manager is communicative and you are given frequent updates until completion of job. Thank you so much I highly recommend Grandmark roofing.
Dave showed up on time. He was professional and quick to assess the roofs leak issues. Presented a fix for the roof and a plan to repair it. Followed through with the fix in a timely manner. Would recommend GrandMark for roofing issues.
Eric went above and beyond today he helped not just with my a/c system but brought me mail to and my Amazon Packages as well now that what I call service.
Dave just came by and gave us a five star estimate, professional and friendly, company estimate this guy Dave wonderful caring person actually cares about people and goes out his way to make sure families are safe. I really trust him with the family home and highly recommend this company .
Recent Roofing & HVAC Projects Across Central California
Explore recent roofing, HVAC, and energy efficiency projects completed by the Grandmark Service Company team. See where our technicians are helping homeowners and businesses solve problems, improve efficiency, and protect their properties.
Real projects completed in Fresno, Sacramento, Bakersfield, Visalia, and surrounding communities.
SERVICE AREAS
Serving Central California Roofing & HVAC Customers
Grandmark Service Company provides roofing, commercial HVAC, insulation, and energy-efficiency solutions for homeowners and businesses across Central California.
North Valley & Capital Region
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Sacramento
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Stockton
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Modesto
Central Valley
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Fresno
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Clovis
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Visalia
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Merced
South Valley
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Bakersfield
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Tulare
Frequently Asked Questions
Most contractors rely only on visual inspections, which can miss hidden problems. Grandmark uses advanced diagnostic tools and inspection technology to identify issues like hidden roof leaks, moisture intrusion, failing HVAC components, and insulation problems.
This allows us to recommend the right repair or replacement solution the first time, helping property owners avoid unnecessary work and unexpected costs.