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 shopping 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

  • BUR Roofs: Cost, Advantages, Repair, and More!
    by Simpson Unlimited on July 27, 2021 at 2:40 pm

    Built-up roofing, known more commonly as BUR, is widely considered the “original” roofing system. Having been around for over 100 years, it has been a reliable flat roof staple of the industry for as long as modern commercial roofing has been done! 

  • Commercial Roof Repairs 101: How to Save Time and Money!
    by Simpson Unlimited on May 28, 2021 at 12:37 pm

    Owning and managing a commercial roof is a lot like owning a car; while the initial purchase is the biggest expense, getting the most out of it requires routine maintenance, proactive care, and, inevitably, repairs.

  • Everything You Need to Know About Commercial Roof Restorations in 2021
    by Simpson Unlimited on April 9, 2021 at 10:45 am

    Good news, building owners and managers: your roof may have more life in it yet! By conducting major repairs or applying a tried-and-true liquid applied roofing system “coating” to your existing roofing system, you can prolong the life of your roof by 10, 15, or even 20 years before needing a full replacement, while keeping maintenance costs and safety hazards low.

  • 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.