GRB Services – A Division of Golden Ratio LLC, is your local commercial and residential roofing and home improvement expert. We are located in Bowie, and service cities across Maryland!

Build on Experience

A Roof Contractor with Decades of roofing installation repair and service experience.

Protect your home and family from the elements! We are here 24/7 to help with any roofing or home improvement project.


Projects Successfully Completed.


Years of collective experience.

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We are A+ Rated with the BBB!
Over 115 positive reviews on Google alone!

Our Proud Roofing Suppliers

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We Are A Certified Contractor
We Are A Certified Contractor
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We Are A Certified Contractor
Shinglemaster Certainteed Ring Contractor
Owens Corning Preferred Contractor

GRB Roofing

Roofing Is Our Specialty

commercial flat roof repair annapolis md

Commercial Roofing

Your roof is your first defense against the elements. Don’t push off necessary repairs, schedule your FREE estimate today!

Roof Installation Crofton, MD

Residential Roofing

Your roof not only protects your house, but it’s one of the most important elements for the visual appeal of your home.

Siding Company Annapolis, MD

Exterior Home Improvements

We specialize in siding, gutters, soffits, windows and skylights, and can help with your next exterior renovation project. 

Deck Contractor Crofton, MD

Decks & Fencing

Decks are an extension of your home. They are the perfect place to host and gather people. Let us help you build the perfect deck! 

Company Value Spotlight


With decades of experience and 24/7 availability, GRB is the top local roofing contractor near you!

GRB Roofing & Insurance

GRB Works With ALL Major Insurance Companies

GRB Roofing

Check Out Our Most Recent Projects

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Ready to Work Together? Lets build a project together!