Don't Replace, Rejuvenate!

Add 5-15 years of life to your roof!


Revolutionary Roof Treatment

Asphalt roofs usually start showing signs of aging after five to ten years depending on region and environmental conditions. The shingle’s granular coating starts washing into the gutters as the essential oils dry up, losing the ability to hold the granular in place. Greener Shingle’s bio-based product was tested and proven to have a 86% better granular adhesion on treated shingles versus untreated.


Perfect Solution For: 

  • Tight Budgets
  • Commercial ROI Maximization
  • Roof Certification ( Never Lose a Deal)
  • Solar Installation
  • Moving soon to another home or building.
  • 5 Year Roof Certification

Save up to 80% Compared To a Roof Replacement!

Questions? Call Us (559) 287-7051

Serving California Residents

    5 star review  One of the things I really liked about GrandMarc energy was the fact that Carlos came out to my house and looked at my roof with me. Naomi text me... read more

    thumb Mike Ledoux

    5 star review  I want to state I did not know anyone at Grandmark before I started the process. Justin was communicative during the whole process of the roof installation. His crew was... read more

    thumb Lloyd Pratt

    5 star review  I really was impressed with the response time when I sent the initial request for a estimate appointment, having someone come out to look at my roof to having the... read more

    thumb Vickie Vaughan

The Story Behind It!

Most asphalt roof shingles can last  20–40 years, yet typical roof warranties span approximately 15–25 years. This means total roof replacements happens more frequently than the shingles’ estimated lifespan. That’s where asphalt shingle rejuvenation comes in. If treated early enough you can extend the life span of your roof shingles much longer than originally estimated.  

Shingle asphalt rejuvenator was inspired by a patented asphalt rejuvenator used to preserve the oil in roads, driveways and parking lots. The formula is a bio-based asphalt rejuvenator technology was then reformulated for asphalt roofing shingles. 

After completing a series of vigorous lab tests the  rejuvenator has demonstrated that it can help reduce the effects of aging after being applied to asphalt shingles, improve granular adhesion, help waterproof the surface and improve fire retardancy. 

This environmentally safe solution improves shingle flexibility which helps the expansion and contracting that happens to the shingle throughout the day. Greener Shingles uses a bio-based soybean oil solution that is safe around the exterior of the home.

roofing maintenance

20,000+ Satisfied Customers

We have provided excellent services to thousands of customers, and we’d love for you to be able to experience the quality of our technicians!


Our team has extensive professional training and a solid skill set to handle your project.

Locally Owned

We are a local, family owned business and serve the greater Central and Northern California area.

100% Satisfaction

We are professionals and proud of our work. If you aren’t satisfied, let us know and we will make it right!

Contact Us Today For Service