Our Commercial Roof Replacement Services

Since 1993 Simpson is the go-to commercial roofing contractor in the Washington D.C., Maryland, and Virginia metropolitan areas, becoming the standard-bearer for every type of commercial roofing repair and exterior building restoration. We specialize in full tear-offs, recover or overlay systems, and new construction. Thanks to our compatibility and certifications with all major manufacturers, we install a vast array of commercial roofing systems on shipping centers, high-rise offices, data centers, and warehouses alike. To us, there’s no job too hard or too high. And given our expertise across the breadth of building exterior needs — TPO roofing, EPDM roofing, PVC roofing, BUR roofing, Modified Bitumen roofs (SBS and APP), Hot Applied Rubberized Asphalt, Cold Applied Rubberized Asphalt, Liquid Applied (coatings), metal building repair and roofing, balcony repair, masonry repair, and full building restoration — you can trust that any and every task will be performed with the utmost proficiency, diligence, and excellence. It’s the only way we’ve done business for nearly 3 decades and how we’ve established ourselves as a cornerstone of the industry. 


Learn everything you need to know about our extensive commercial roof replacement process and its costs, timelines, and details over here on our blog!

Full Tear-Off

Sometimes you need a clean slate. As the name implies, a full tear-off involves the complete removal of your existing commercial roofing system,  allowing us to evaluate your decking and determine the existence of any underlying conditions. It also ensures we bring your roof system up to energy code, meaning less strain on your HVAC systems. Attention to detail is how Simpson proudly does business. We don’t just find immediate solutions for problems. We perform every duty with a complete understanding of your building envelope and a thoughtful, tactical approach to maximizing its lifespan. Intelligent design and professional integrity are ingrained into the Simpson DNA.

Roof Recover

Known more casually as a “roof over,” a roof recover system is our default prescription for an existing commercial roofing system whose substrate integrity is intact and shows no signs of moisture infiltration. A “roof over” provides up to a 20-year material and labor warranty, making it exponentially more cost-effective than a full commercial roof replacement. This is our cost effective solution that gets you back to work fast without throwing a wrench in your budget.


Our commercial roofing experts can identify the perfect roofing solution for you. Learn about our comprehensive roof inspections here.

New Construction

One of Simpson’s foundational practices is working directly with general contractors, architects, and building owners alike to ensure every commercial roofing service we perform is the cherry on top of your entire building envelope. From shopping centers to high rises, data centers to schools, we deliver on time, on budget, and on the mark for every project specification. Oh, and have we mentioned the unrivaled expertise of our staff? Thanks to them, any project of yours is guaranteed top shelf workmanship and incomparable customer service. We’re proud of our vast rolodex of long-standing contractor relationships and look forward to establishing new ones!


Ready to consult one of our professionals about a new commercial roofing project? Learn the costs and details of our FREE roof inspections right here.

Schedule Free Commercial Roof Inspection

  • Commercial Roofing vs Residential Roofing: What's the Difference in Virginia?
    by Simpson Unlimited on February 2, 2021 at 11:58 am

    A roof is just a roof, right? Something to cover your head and keep the tenants, assets, or whatever else is inside safe and dry? How different can a commercial roof be from a residential roof, other than the types of structures they’re built on?

  • What is EPDM Roofing and How Much Does It Cost?
    by Simpson Unlimited on December 18, 2020 at 3:00 pm

    EPDM roofing, or more formally “Ethylene Propylene Diene Monomer” roofing, is a type of single-ply roofing membrane that has remained a popular, time-tested staple of the commercial roofing industry since the 1960’s. EPDM is readily available and relatively straightforward to install, meaning less labor costs than other more complex roofing systems. Thanks to its traditional installation options and easy repairs/maintenance, it’s an economical roof option with lifespans that can exceed 30 years.

  • What is TPO Roofing and How Much Does It Cost?
    by Simpson Unlimited on October 22, 2020 at 10:11 pm

    TPO roofing systems are the most common commercial roofing system available, making up roughly 40% of the commercial roofing market share. If you've ever passed by a commercial building with a bright white roof, then you’ve more than likely seen a TPO roof! 

  • Masonry Restorations: What Do They Cost and Why?
    by Simpson Unlimited on October 2, 2020 at 10:45 am

    Masonry restoration is an umbrella term for any building service performed on the stone, brick, clay, or concrete exterior of a building. It’s a highly specialized skill that often requires a separate contractor but is one of Simpson Unlimited’s many unique turnkey building envelope services.

  • What Does a Commercial Roof Inspection Cost and Why Are They Important?
    by Simpson Unlimited on September 28, 2020 at 2:07 pm

    Commercial roof inspections shouldn't be a mystery. We're going to take you through the most common questions about commercial roof inspections we offer throughout Virginia, Maryland, and DC, and all of the details, costs, and preparation they require.   One of a building owner’s worst nightmares is finding out that your building requires an emergency roof replacement and you don’t have the funding to support the project. Maybe the single-best action you can proactively take is a planned approach to your commercial roof maintenance by scheduling bi-annual roof inspections with a certified commercial roofing contractor, along with conducting your own routine basic maintenance. You don’t want to be “that guy” caught off guard with the burden of an unplanned major building expense.