We have experience experience in all types of shingle roof installation including tear and replacement, overlay systems, shingle repair service, consulting, specification writing and home inspections. We are certified installers of GAF, CertainTeed and other higher quality shingle manufacturers.


HTH has been installing flat roofing systems since 1908. we bring over 100 years of experience coupled with current knowledge of the modern single ply and two ply membrane roof systems. We have experience and manufacture certifications in the instillation of EPDM, TPO and APP modified membrane systems.


Our firm has vast experience in fabrication and installation of metal roof systems, including Flat Seam, and Standing Seam roofing. We have our own sheet metal shop that gives us the ability to fabricate custom systems using aluminum, galvanized steel, stainless steel and copper.


Our firm proudly brings over 100 years of expertise to any roofing or roof related project. Allow us to bring that knowledge to you when you are purchasing or selling a home or building. The years of experience in the roofing industry will provide you with the confidence that your home or building covering is correct and will provide you with years of roofing protection.

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H.T. Harrison & Sons is a family owned and operated commercial and residential roofing and sheet metal company servicing the greater D.C., Maryland and Virginia areas. H.T. Harrison & Sons is now entering its fourth generation since it was founded in 1908 by Herbert Thomas Harrison, Sr.


424 N. Stonestreet Ave.
Rockville, MD 20850
Mon - Fri: 7:30am - 4pm

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