Commercial Roofing That Protects Your Business
TPO, EPDM, modified bitumen, and standing-seam metal systems for retail, office, warehouse, medical, and multi-family properties across MD & DE.
Commercial Roofing for Maryland & Delaware Businesses
Your commercial roof is a business-critical asset. A single leak shuts down operations, damages inventory, exposes you to slip-and-fall liability, and triggers thousands in lost productivity per day. Potomac Custom Remodeling has installed and serviced commercial roofs across the Mid-Atlantic for retail centers in Bowie and Annapolis, office condos in Columbia and Bethesda, warehouses on Route 50, medical and dental practices, restaurants, churches, daycares, and multi-family properties from Crofton to Rehoboth Beach.
We are not a residential contractor that occasionally does commercial work. Our commercial division carries dedicated single-ply mechanical equipment, robotic TPO welders, certified manufacturer training (GAF, Carlisle, Mule-Hide), and the OSHA-compliant fall protection systems demanded by property managers and risk-management departments.
TPO Single-Ply Membrane — Our Most Recommended Flat Roof System
Thermoplastic Polyolefin (TPO) is the most widely specified low-slope commercial roofing system in North America for good reason: heat-welded seams that are stronger than the membrane itself, a highly reflective white surface that lowers cooling loads by 10-20%, Class A fire ratings, and 20-30 year manufacturer warranties at a price point well below PVC. We install 60-mil and 80-mil mechanically attached and fully adhered TPO from GAF EverGuard, Carlisle Sure-Weld, and Mule-Hide.
EPDM Rubber Roofing — Proven 30+ Year Performance
Ethylene Propylene Diene Monomer (EPDM) is the workhorse of commercial roofing — black single-ply rubber with a 50-year track record. Excellent for large-area roofs where the slightly higher heat absorption is offset by lower material cost. Available in fully adhered, mechanically fastened, and ballasted configurations.
Standing-Seam Metal Roofing
For pitched commercial structures (churches, banks, premium retail) and high-end industrial applications, standing-seam metal delivers a 40-60 year lifespan with virtually zero maintenance. The concealed-fastener design eliminates the most common leak point in exposed-fastener systems. Often installable directly over existing roofs as a retrofit.
Modified Bitumen & Built-Up Roofing
For roofs with heavy rooftop traffic, frequent service equipment, or specific historical-replacement requirements, we install SBS-modified bitumen and 4-ply built-up systems with mineral-cap surfacing.
Minimal Business Disruption — Built Into Every Project
Phased installation schedules, evening and weekend work, OSHA-certified fall protection, daily clean job sites, and coordination with your property management or facilities team. We provide certificates of insurance up to $5M aggregate on request.
Products We Trust
TPO Single-Ply Membrane
- ✓60 or 80 mil thickness
- ✓Heat-welded seams
- ✓Energy-efficient white surface
- ✓20-30 year warranties
- ✓Class A fire rated
EPDM Rubber Roofing
- ✓30+ year proven lifespan
- ✓Superior flexibility
- ✓All-weather performance
- ✓Low maintenance
- ✓Economical for large areas
Standing-Seam Metal
- ✓40-60 year lifespan
- ✓Concealed fastener design
- ✓Superior wind resistance
- ✓Zero maintenance
- ✓Multiple finishes & colors
Materials & Specs Comparison
Commercial roof systems we install across the Mid-Atlantic.
| System | Lifespan | Best For | Typical Cost / sqft | Warranty |
|---|---|---|---|---|
| TPO 60-mil mechanically attached | 20-30 yrs | Retail, office, warehouse | $6.50-$9.50 | 20 yr NDL |
| TPO 80-mil fully adhered | 25-30 yrs | Medical, restaurant, premium | $9-$14 | 25-30 yr NDL |
| EPDM ballasted/adhered | 30+ yrs | Large-area industrial | $5.50-$8.50 | 20-30 yr |
| Modified bitumen SBS 2-ply | 20-25 yrs | Heavy traffic, mechanical roofs | $7-$11 | 20 yr |
| Standing-seam metal | 40-60 yrs | Pitched commercial, churches | $12-$22 | 30-50 yr finish |
What to Expect — Our Process
- 1Week 1
Roof Assessment & Core Cuts
On-site inspection, drone aerials, infrared moisture scan, and core cuts to verify deck, insulation, and existing membrane condition. Written report delivered to property management.
- 2Week 2
System Specification & Proposal
Engineered specification matching your insurance, warranty, and budget targets. Multiple system options with side-by-side cost-of-ownership comparison.
- 3Week 3-4
Permitting & Material Staging
Commercial permit pulled, COI delivered to property manager, and materials staged on site or rooftop crane-loaded after hours.
- 4Install Days 1-3
Tear-Off & Insulation
Phased tear-off keeps tenants dry. New ISO insulation board installed to current code R-value. Tapered insulation packages designed for proper drainage.
- 5Install Days 4-7
Membrane Installation
TPO/EPDM membrane installed per manufacturer specification. All seams robotically welded and probe-tested. Flashings, drains, and curbs detailed by hand.
- 6Final Day
Manufacturer Inspection & NDL Warranty
Manufacturer field rep inspects the completed system before warranty issuance. Final walkthrough with property management, full as-built documentation provided.
Commercial Roofing in Maryland & Delaware — Local Realities
Mid-Atlantic commercial roofs face a punishing combination of summer heat (160°F+ surface temps on dark EPDM), freeze-thaw cycling, hurricane remnants from the Atlantic, and the heavy snow loads of Western Maryland. Add the rooftop HVAC traffic typical of strip retail and medical office, and you have a system that demands serious engineering.
Code & Insurance Requirements
Maryland and Delaware both enforce the IBC with state amendments. Commercial reroofs in Anne Arundel, Howard, Prince George's, and Montgomery counties require permits and engineered drainage calculations. Sussex County DE requires hurricane-rated edge metal within 10 miles of the coast. Most commercial property carriers now require Factory Mutual (FM Global) approved assemblies on properties over $5M in insured value — we install to FM 1-90 and 1-120 specifications as standard.
Energy Code & Cool-Roof Compliance
The 2018 IECC adopted by both states requires R-30 minimum insulation on commercial reroofs. White TPO roofs satisfy California Title 24 and CRRC cool-roof initial reflectance requirements, which helps with LEED projects and PACE-financed energy upgrades.
Two Local Offices
Maryland HQ: 2138 Espey Court, Suite 6, Crofton, MD 21114 — (443) 684-4448. Delaware office: 116 E Front St, Unit B, Laurel, DE 19956 — (302) 248-8881.
Investment, ROI & Financing
Typical project ranges in Maryland and Delaware. Final pricing depends on size, complexity, and product selection — every estimate is free and itemized.
Targeted seam repair, flashing renewal, drain cleaning, and infrared leak isolation.
Full tear-off, new ISO insulation, 60-80 mil TPO membrane with 20-25 year NDL warranty.
Standing-seam metal retrofit or fully adhered 80-mil systems with 30 yr warranties.
Resale ROI: Cool-roof systems pay back 5-9 years through HVAC savings; new commercial roofs typically extend insured asset life by 20+ years.
PACE financing and equipment leasing options available for qualifying commercial properties. Explore financing →
Explore Our Roofing Capabilities
Service Areas We Cover
Two offices serving Maryland and Delaware homeowners with the same crews, warranty, and standard. View all service areas →
Frequently Asked Questions
What Our Commercial Roofing Customers Say
"Very attentive company. Good client communications and a quality roof installation. They walked us through the entire process and made sure we were happy with every detail."
"Professional team that understood our business needs. They worked around our schedule and completed the project without any disruption to our operations."
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