Call Us! (240) 660-2911 MHIC #25738  |  VA Class A #048696A

Providing Commercial Roofing Services to MD, VA & Metro DC for over 27 Years


"Perry, I wanted to drop you a note of thanks for the great job that you and your staff from lnterstate performed in the replacement of the Leahy Hall roof here at Catholic University. From the very beginning I was impressed with the way the job was scheduled, the manpower that was provided to get the job completed in quick time, the communication, and the way you all responded to our concerns. Although there were very few, any issues we brought to your attention were addressed and resolved immediately and professionally. I hope to have the opportunity to work with you in the future as I know all of our roofing needs will be met without any worry on our end."

-Rick R.
Assistant Director, Building Maintenance
Catholic University of America

"Dear Mr. Cho:
On behalf of the College, I would like to congratulate you for a job well done. You have successfully replaced 677 squares of four-ply BUR on three of our buildings on campus. The project was completed on time and without disruption to our normal operation. The coordination was good and workmanship superb.

I would like to use your company whenever I could for future roofing projects and would have no hesitation recommending your company to anyone."

-Eric K.
Montgomery College Architect

"On behalf of the FCPS Construction Management Department and Oak Contracting, we would like to express our appreciation and thanks to Interstate Corporation for a job well done in the construction of the Urbana High School Addition project...

It was a pleasure working with lnterstate Corporation on the UHS Addition project and we look forward to working together again on the successful completion of future projects."

-Bradley A.
Frederick County Public Schools
Senior Project Manager

"Dear Mr. Cho, I am writing to thank you for the manner in which our re - roofing job was executed. This was a major project. It included removal of the old roof to the deck, infill of several old curb areas, new tapered insulation, flashing, coping and a new built up roof. Our interior space was occupied when the February snow was on the roof and then it rained, but you delivered. John orchestrated the project in three phases. Despite shoveling snow from the roof and rain, we were never left open to the elements and the project was completed without a drop of water entering the building. Please feel free to use me as a reference. I could not recommend anyone more highly."

-Roland R.
Vice President
Euro Motorcars

"Dear Mr. Cho: I want to take this opportunity to thank you for the quality and timeliness of your company's roofing work this summer. Your cooperation in modifying your work schedule to accommodate school functions was greatly appreciated. I look forward to working with you on Phase ll at Gar-Field and other projects should you be the successful bidder. Again, I say thank you for a job well done."

-Paul O.
Capital Projects Coordinator
Prince William County Public Schools

"...Thank you for all your efforts to promote the highest of quality standards in the roofing industry, and thank you for choosing Firestone as a key business partner."

-Donald R.
Division Manager,
Roofing Solutions Firestone

"Your company's professionalism in its cooperation with County staff, in its performance above contract standards, in its meeting of all schedule commitments, in its excellent quality assurance, and in its effective response to all County concerns, is truly appreciated. My staff has made numerous recommendations of your firm to other municipal, state, federal entities, as well as to private companies, and we look forward to future opportunities to work with your company. Again, we sincerely appreciate your outstanding work for the County!!"

-James I.
Howard County Dept. of Public Works

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"Exceeding our clients expectations by delivering quality service in a timely and professional manner, is our goal"
— Perry Cho, President