Simpson Unlimited, Inc.

Simpson Unlimited, Inc. Simpson Unlimited, LLC is a commercial roofing, waterproofing, and masonry restoration company located in the Washington, D.C. Metropolitan Area.

Gregory Simpson formed Simpson Unlimited, Inc. during July 1992. Prior to the organization of his own company, Mr. Simpson worked for over eleven (11) years as a construction & restoration superintendent and estimator. After a decade of providing quality workmanship, an impeccable safety record, hiring of top-notch management & supervisory personnel, and the employment of time management procedure

s, Mr. Simpson has built a “blanket” operation with an excellent reputation. The goals set for the company back in ‘92 involved the establishment of a full service firm that specialized in all areas of commercial exterior restoration. Consequently, SUI offers the following: Masonry Restoration, Concrete Repair & Replacement, Stone Replacement, Waterproofing, Sealant Application, Roofing, Specialty Coatings, Architectural Sheet Metal, Cleaning/Power Washing, Painting, and Window Replacement. SUI has amassed an impressive client list and is well known for its ability to perform difficult repairs, specialize in high-rise structural restorations, exceed customer expectations, and remain within the client’s budget. Today Simpson Unlimited, Inc. employs a staff of over 120 professional employees with experience ranging from ten to over twenty-five years. With this work force and our management capability the company takes on million dollar projects with ease and confidence. When a client places its trust in Simpson Unlimited, Inc. they know that they are going to get a quality product delivered in a timely manner. At Simpson Unlimited we believe that by choosing our services you are opting for excellence.

04/03/2026
Don’t forget to set your clocks forward one hour on Sunday. While you're adjusting your schedule, it's also the perfect ...
03/06/2026

Don’t forget to set your clocks forward one hour on Sunday. While you're adjusting your schedule, it's also the perfect reminder to give your commercial roof a little spring attention.

Winter weather can leave behind debris, clogged drains, and minor damage that often goes unnoticed until it becomes a costly problem. A quick spring roof inspection and cleaning can help:

✔ Clear debris from drains and gutters
✔ Identify small issues before they become leaks
✔ Extend the life of your roofing system
✔ Prepare your facility for spring storms

Think of it like spring cleaning for your roof. A little preventative maintenance now can save a lot of time, money, and headaches later.

Address

11121 Industrial Road
Manassas, VA
20109

Opening Hours

Monday 8am - 5pm
Tuesday 8am - 5pm
Wednesday 8am - 5pm
Thursday 8am - 5pm
Friday 8am - 5pm

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