Commercial Roof Replacements

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.

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!

Schedule Free Commercial Roof Inspection

  • 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.

  • Commercial Roof Replacements: Everything You Need to Know
    by Simpson Unlimited on September 9, 2020 at 7:22 pm

    Commercial roof replacements are huge projects with a wide array of factors that can influence the cost, project timeline, and how invasive or noninvasive the project will be. Some factors include the height of the building, access, whether the project requires a full replacement or an overlay, and the type of new roof to be installed. Just as important are the weather conditions and time of year it’s being replaced.   We’ll take you through Simpson’s battle-tested process of the roof inspection, estimating, planning, scheduling, and budgeting, and all of the major variables and considerations to keep in mind as you determine how and when to replace your commercial roof. (Learn more about Simpson Unlimited's roof replacements and schedule an inspection here)

  • Commercial Roofing Maintenance: 5 Easy Steps to Protect Your Warranty and Prolong Your Roof Life
    by Simpson Unlimited on August 11, 2020 at 5:17 pm

    The importance of commercial roofing maintenance can’t be overstated. Making a habit of conducting routine inspections, consulting a commercial roofing contractor, and ensuring the drainage points stay clear are the keys to prolonging your roofing system’s lifespan. Doing so keeps your manufacturer’s warranty in good standing, protects your investment, and, most importantly, ensures your tenants stay dry.

Fall Inspection, Winter Protection

Are you ready for Winter?

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