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Townhouse Exteriors

Flat Roof Repair 
Historic Brick Restoration

GL Barnhart Construction

GL Barnhart Construction is a flat roof repair and historic brick restoration company, based in Capitol Hill, Washington, DC. Our personal history goes back generations and decades both here in Capitol Hill and in the trades of roofing and masonry and historic restoration.   

Precise and Tailored Roof Repairs

Targeted Repairs

GL Barnhart Construction is a small company and we take a more customized approach to our work.  We are based here in Capitol Hill, DC. We specialize in repairing and maintaining the exterior roofs of old buildings in the area. Our targeted approach to repairs and restoration allows for efficacy in upkeep and maintenance.


Feel free to send an email at our contact page and schedule a consultation.



Contact Us

To schedule a consultation and or request a call or ask any questions, just send us a message here or at

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Some Examples of GLBC Work


Gary and his crew have done great work for me, my clients, and friends. Very knowledgeable. Highly recommend."

—  Ben P.  15 year DC resident and realtor


GL Barnhart Construction’s

History in Capitol Hill

GL Barnhart Construction is a flat roof repair specialist based in Capitol Hill, DC focused on the Capitol Hill neighborhood. After 10 years of focusing on repair, restoration, flat roofing and repointing work in this neighborhood, our particular service offerings are tailored around the needs of these historic buildings. We specialize in the flat roofing, found on most of the buildings here in our historic part of the city. In addition to flat roofing, we also work in flat roof upkeep, maintenance, and repair of many of the adjacent systems and elememts of historic facades.

We have a long history in the restoration and repointing of the historic masonry, and work in repair of masonry rooftop elements as well, such as rooftop chimney restoration, parapet repair, and front mansard repair. Our company and service offerings have changed over the years, and we have now mostly limited our work to the things we do best. Most flat roof systems in our area include TPO systems for new roofs or re-roofing, but also PVC and other thermoset types of roofs, standing seam metal roof repair, and terne and other alloy roof repair recoating, modified bitumen restoration, recoating, and upkeep.

Some of the Capitol Hill neighborhoods we work in on a regular basis include: Lincoln Park, Hill East, Kingman Island, River Terrace, H Street Corridor, Pennsylvania Avenue SE, Eastern Market, Union Market, Barracks Row, the Car Barn and surrounding area, Stanton Park, the RFK Stadium/Armory neighborhood, Rosedale, Barney Circle, and the neighborhoods around Congressional Cemetery.

The Capitol Hill neighborhoods have been central to our company's growth and development over the past 10 years, and we've worked to give back and be a part of the community in many ways. The Capitol Hill Restoration Society has been a wonderful organization for us from our start. We have worked with and been a part of programs with the Latino Economic Development Center, the Hill Center, the Capitol Hill Village, and our company was awarded the Hilly Award for the number one contractor in all of Capitol Hill. We have volunteered for years at the Center for Empowerment and Employment Training (CEET), the Innerstate Boxing Club on Florida Avenue NE, Maury Elementary, Phelps ACE High School, and many, many more.

In our many years working here in Capitol Hill, we have worked on over one thousand individual buildings. Some of our more notable, well-liked, and institutional clients include: Atlas Theatre, Union Market, Union Kitchen, Hills Kitchen, Tortilla Cafe, Number One Sons, Christ Church, Fragers' post-fire rebuild, Ginkgo Gardens, The Pretzel Bakery, Pro Fish, Adams Morgan Hotel, Eastern Market Redevelopment, Bratton Realty, Old City CrossFit, Buffalo and Bergen, Design Cadence, Bookstore Movers, On Toast, Fishwife, American Society of Agronomy, Capitol Hill Outfitters, Capitol Hill Books, and many, many more.

In addition to our base services and repair and restoration work, we also, in certain cases, will offer consultations to provide services related to scope development, condition assessment and defect analysis.  Email us here and let us know if we can help.

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