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About Old Line Roofing & Solar

Old Line Roofing & Solar owner, Dan O’Toole, began doing business in 2001 when he and his father decided to hang up their welding torches and lay the foundation for the future of their family. With over 60 years of experience as iron workers, shaping the skyline of downtown Baltimore, the duo promised to each other dedication and determination. Rooted in their strong Irish heritage of hard work and kindness, they started “Claddagh Construction Services,” setting a standard doing repair work and remodeling for members of their own community. The mindset has always been family oriented. With this mentality, Dan Jr and Dan III prided themselves on listening to and understanding exactly what their clients were trying to accomplish. Making sure their clients were satisfied was always their number one priority in all they did.

Seeing a large need for solar services in the Maryland area, Old Line Roofing and Solar has since grown into “Old Line Roofing & Solar,” bringing Marylanders an even larger array of professional services from the same family who specialized in roofing and construction. Old Line Roofing & Solar has worked diligently through the pandemic to help homeowners with their roofing, solar, and siding needs and building a greener world together. “The proof is on the roof!”

Why Old Line Roofing & Solar For Your Roofing Needs?

  • Your roof inspection is FREE!

  • Your roof inspection will be performed by a certified roof inspector.

  • If you do have roof damage, we will meet with your homeowners insurance company and work off of their estimate. If you DO NOT have roof damage,we will give you peace of mind for how long you can expect your roof to last.

  • We offer a Lifetime Labor Warranty! We use only the highest quality materials and craftsman for your roofing project, and have diverse options that fit your style and aesthetic preferences.

  • We are a local contractor and have been in the business for 25 years. We stand by our work 100% and your satisfaction with the finished product is our priority.

  • MHIC #140449 Licensed. Bonded & Insured.

Certified Roofing Company in the State of Maryland


State Of Maryland Department of Labor, Licensing, and Regulation


Old Line Roofing & Solar is certified under the Maryland Department of Labor, Licensing and Regulation. The division of occupational and professional licensing ensures that businesses and individuals across the state are operating under the standards of the industry. The licensing board makes sure companies are protecting the health, safety and welfare of the public.

Our license number is always prominently displayed on our website and trucks, and our employees can provide you the license number at any time. You can look up our license number on the Department of Labor, Licensing and Regulation website as well. Our license not only keeps us accountable to our customers, but also ensures our business is equipped with up-to-date regulatory practices as well as employment and training services.
Old Line Roofing & Solar in Carney, Maryland aims to earn the trust of our consumers with each one of our process, and we have done so for the past 15 years. For more information on our license and other certifications, contact us today.


Baltimore County Roofing Company - HAAG Certified


It’s common sense: building materials don?t last forever. Throughout a product?s life cycle, its ability to keep you dry and insulated can be affected in a variety of ways. The natural process of weathering and aging can be accelerated by a number of factors, such as the damaging effects of hail and wind or other non-natural (mechanical) forces.

While these issues are very different in origin, on the surface they can look quite similar. Determining the true cause of an issue with confidence requires advanced knowledge and thorough investigation techniques.

This is why Haag Certification is so valuable. Haag Certified Inspectors are not beginners in the field. They are adjusters, estimators, home inspectors, roofing contractors, consultants, and other industry pros who have fine-tuned their inspection skills to find damage where it exists.

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