Different Types of Commercial Roofs: Choosing the Best Commercial Roofing Systems for Your Building

If your building’s roof is aging—or you’re planning new construction—you’ve probably searched for different types of commercial roofs and wondered: what is the best commercial roofing material? The best option depends on how your building is used, your climate, how much foot traffic your roof gets, energy-efficiency goals, and your budget.  This guide breaks down the most common commercial building roof types, the main types of commercial roofing materials, and how to choose the best commercial roofing systems for your needs. First: The 3 Main Commercial Building Roof Types (By Roof Slope) Before picking a material, it helps to understand the roof construction style. Most commercial buildings fall into one of these categories: 1) Flat Roof Construction Flat roofs are common for commercial properties because they allow space for rooftop equipment (HVAC units, vents, satellite systems). Most “flat” roofs still need positive drainage to prevent ponding water, which is often achieved using tapered insulation. Best fit materials: TPO, PVC, EPDM, modified bitumen, built-up roofing (BUR) 2) Low-Slope Roof Construction Low-slope roofs have a slight pitch to move water off the surface. Material choice matters here—some systems perform much better than others on low slopes. Best fit materials: TPO/PVC/EPDM, modified bitumen, BUR Note: Metal systems on low slopes can be more prone to leakage if not designed specifically for that application. 3) Steep-Slope Roof Construction Steep-slope commercial roofs are similar to residential roofs (gable or hip styles), often built with trusses or framed lumber. Best fit materials: Standing seam metal, upgraded asphalt shingles, tile (in some markets) The 4 Factors That Determine the Best Commercial Roofing Systems When people ask what is the best commercial roofing material, the real answer is: the best material is the one that matches your building’s needs in these four areas: 1) Lifespan and Warranty Goals Do you want the longest lifespan possible, or a cost-effective system with a solid warranty? 2) Durability and Roof Foot Traffic Does your roof get frequent visits from HVAC/mechanical crews? More traffic typically calls for tougher materials and/or thicker membranes. 3) Energy Efficiency (Insulation + Reflectivity) Commercial energy requirements often focus on insulation performance (R-value) and heat reflectivity. White reflective membranes can help reduce heat load. 4) Total Cost (Materials + Labor + Long-Term Maintenance) Upfront price matters, but long-term maintenance and repairability can make one system a better investment than another. Types of Commercial Roofing Materials (Top Options Explained) Below are five of the most common types of commercial roofing materials used today, with practical pros/cons to help you compare. 1) Single-Ply Membrane Roofing (TPO, PVC, EPDM) Best for: Flat and low-slope roofs needing energy efficiency and straightforward repairs. What it is: A single membrane layer installed over insulation/cover board with welded seams (TPO/PVC) or glued/taped seams (EPDM). Membranes come in different thicknesses (often measured in “mil”). Pros •  White options can be highly reflective and energy-efficient •  Lightweight system •  Strong wind ratings when properly installed •  Resistant to UV exposure (especially TPO/PVC) •  Repairs are typically straightforward Cons •  Can be punctured by careless foot traffic (tools/screws) •  Not the most visually attractive roof from above •  Details around penetrations must be done well to prevent leaks Common use case: Warehouses, retail centers, office buildings with rooftop HVAC. 2) Modified Bitumen Roofing (Mod-Bit) Best for: Roofs with more foot traffic or where added durability is needed. What it is: An asphalt-based, reinforced roofing system installed in layers. It can be applied in different ways (self-adhered, torch-applied, cold-applied, or hot-applied, depending on project needs). Pros •  Multi-layer durability •  Often a strong choice for roofs with frequent foot traffic •  Good resistance to wear and tear Cons •  More layers can mean more labor and higher cost •  Repairs can be more complex than single-ply •  Installation quality matters a lot (seams and transitions) Common use case: Buildings with heavy rooftop equipment access. 3) Built-Up Roofing (BUR / “Hot Tar”) Best for: Maximum toughness and long lifespan on flat roofs where durability is a top priority. What it is: Multiple layers (“plies”) of roofing material laminated together with asphalt, often finished with a protective top layer (like aggregate). Pros •  Very durable system •  Handles heavy foot traffic well •  Often lasts 20–30 years when maintained properly Cons •  Higher labor and material intensity (multiple layers) •  Installation can be messy and more disruptive •  Typically requires experienced crews and careful safety practices •  Repairs can be challenging depending on the top surface Common use case: Older commercial buildings and projects prioritizing longevity/durability over aesthetics. 4) Metal Roofing (Standing Seam and Screw-Down) Best for: Buildings where appearance, long service life, and wind performance matter. Standing seam metal (concealed fasteners) Pros •  Very long lifespan (often 50+ years when installed well) •  Excellent wind resistance •  Clean, high-end appearance that adds value Cons •  Higher upfront cost •  Requires skilled installation, especially for flashing details Screw-down metal (exposed fasteners) Pros •  More economical than a standing seam •  Good curb appeal for the price Cons •  Exposed fasteners can loosen over time due to expansion/contraction •  Typically requires maintenance sooner (fastener checks, sealant upkeep) Common use case: Commercial condos, churches, offices, and properties where the roof is visible. 5) Asphalt Shingles (Upgraded/Designer Shingles) Best for: Steep-slope commercial roofs that resemble residential construction. What it is: Higher-grade shingles (not basic builder-grade), chosen for better wind rating, improved appearance, and longer life. Pros •  Familiar look and strong curb appeal •  More affordable than many premium systems •  Upgraded shingles can last 25–35 years in favorable conditions Cons •  Shorter lifespan than many metal options •  Replacement can be disruptive for tenants/customers (noise and debris) •  Storm damage can shorten life, depending onthe  location Common use case: Office buildings or multi-family properties with steep-slope sections. So… What Is the Best Commercial Roofing Material? Here’s the simplest way to match goals to systems: •  Best overall for flat/low-slope efficiency: TPO or PVC •  Best for heavy foot traffic on flat roofs: Modified bitumen or BUR •  Best for long lifespan + curb appeal: Standing seam metal •  Best budget-friendly steep-slope option: Upgraded architectural shingles •  Best when maintenance access is frequent: systems designed for durability (often multi-layer) The “best” isn’t universal; it’s what performs best under your building’s specific conditions. Quick Checklist Before You Choose Use this list to narrow down your best options: •  How much foot traffic will the roof get? •  Do you need a higher R-value or better energy performance? •  Is the roof exposed to chemicals/grease (restaurants/industrial)? •  What’s your local risk for high winds, hail, or heavy snow? •  Is the roof highly visible to customers/tenants? •  Do you want the lowest upfront cost—or the best lifetime value? When You Need Help Fast If you’re dealing with active leaks or storm damage and can’t wait for a full replacement plan, prioritize getting the roof stabilized first, then evaluate long-term options. If your commercial roof is actively leaking or has storm damage, the priority is always to stop water intrusion and prevent interior damage.  A qualified contractor can stabilize the situation quickly, document problem areas, and recommend the most durable long-term fix, whether that’s targeted repairs or a full replacement.  If you need immediate help, contact a provider that offers emergency commercial roofing. Final Thoughts Understanding the different types of commercial roofs makes it much easier to choose confidently.  Start by identifying your commercial building roof types (flat, low-slope, or steep-slope), then compare the types of commercial roofing materials based on lifespan, durability, efficiency, and cost.  With the right match, you’ll reduce leaks, lower maintenance headaches, and protect your building for years.