Washington Ave, Golden, CO 80401

(970) 539-4576

Denver, CO

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Commercial Single-Ply Flat
Roofing Contractors in Denver, CO

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Roofing contractors installing a rolled single-ply membrane on a commercial flat roof.

Commercial Flat Roofing Installation & Repair

A failing flat roof can disrupt tenants, damage inventory, and turn a small leak into a costly building issue. Guardian Roof Coating installs, repairs, overlays, and replaces commercial single-ply flat roofing systems before the problem gets worse.

Our single-ply roofing services include:

  • EPDM, TPO, and PVC roofing systems
  • Commercial flat roof leak diagnostics
  • Single-ply roof repair
  • Roof overlays when the existing system qualifies
  • Tear-off and replacement when the roof is too damaged to save
  • Maintenance and repair planning

Building Types

Roofing Solutions for Denver Commercial Buildings

Denver flat roofs face sun, hail, snow, rooftop equipment, foot traffic, and standing water. Over time, those conditions can weaken seams, flashing, drains, and membrane surfaces.

Commercial flat roofing includes a variety of roofing systems used on low-slope commercial buildings. Single-ply roofing is one of the most common types of commercial flat roofing and includes EPDM, TPO, and PVC membrane systems.

Guardian Roof Coating helps property owners and managers stop leaks, protect the building, and choose the right flat roofing path.

We service single-ply flat roofs on:

  • Warehouses
  • Retail centers
  • Office buildings
  • Industrial properties
  • Multifamily buildings
  • Low-slope commercial buildings
Commercial roof with fresh roof coating in Denver.

Is Single-Ply Right for Your Roof?

When Single-Ply Roofing Makes Sense

A commercial roof problem is not just a roof problem. It can affect tenants, inventory, operations, maintenance budgets, and long-term property value.

Single-ply roofing helps solve:

  • Recurring leaks that keep coming back after patch work
  • Seam and flashing failures across aging flat roofs
  • Interior disruption from active water entry
  • Budget uncertainty from constant emergency repairs
  • Poor roof performance around drains, edges, and rooftop equipment
  • End-of-life roof conditions that need more than coating

Roofing Systems

Single-Ply Roofing Systems for Commercial Flat Roofs

Different flat roofs require different solutions. Guardian Roof Coating evaluates roof condition, drainage, building use, and long-term goals before recommending a roofing system.
EPDM Roofing
Flexible rubber roofing membrane commonly used on commercial flat roofs. Guardian Roof Coating installs, repairs, and evaluates EPDM systems, including seam failures, flashing issues, punctures, and drainage concerns.
TPO Roofing
Heat-welded single-ply membrane designed for commercial flat roofs. Our team provides TPO installation, repairs, leak diagnostics, seam repair, and replacement planning.
PVC Roofing
Durable single-ply roofing system suited for demanding commercial roof environments. We evaluate roof condition, drainage, detailing, and replacement options before recommending PVC systems.
Maintenance & Repair
Regular inspections, leak diagnostics, seam repairs, flashing repairs, drainage evaluations, and preventative maintenance designed to extend roof life and reduce unexpected failures.
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Our Process

Our Commercial Single-Ply Roofing Process

Guardian Roof Coating keeps the process direct, practical, and focused on the building’s actual needs.

  1. Inspect the Roof
    We review the roof surface, seams, flashing, drains, penetrations, edge details, and leak-prone areas.
  2. Diagnose the Problem
    We look for the real source of failure. Flat roof water can travel, so we do not rely on guesswork.
  3. Recommend the Right Solution
    You get a clear recommendation for repair, restoration, roof coating system, overlay, or tear-off.
  4. Complete the Work
    If single-ply roofing is the right choice, our in-house crews handle the project with the detail flat roofs demand.
  5. Plan Long-Term Maintenance
    We help you protect the roof with maintenance and repair planning after the work is complete.

Read What Our Customers Say

Schedule Your Commercial Flat Roof Inspection

If your commercial flat roof is leaking, aging, or being quoted for replacement, get an expert inspection before you commit. Guardian Roof Coating will inspect the roof, explain what is happening, and recommend the right path forward.
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Frequently Asked Questions About Single-Ply Roofing

Every roof is different. These answers address common questions we receive from Denver property owners evaluating repairs, restoration options, and single-ply roofing systems.
Single-ply roofing is a flat roof system made from membrane sheets such as EPDM, TPO, or PVC. It is commonly used on commercial low-slope roofs that need repair, overlay, or replacement.
Many flat roofs can be restored through repairs, coatings, or maintenance programs before replacement becomes necessary. A roof inspection is the best way to determine whether restoration remains a viable option.

Recurring leaks, open seams, wet insulation, widespread membrane damage, and repeated failed patches can mean the roof needs more than basic repair. You need an inspection to know for sure.

Sometimes. An overlay may be possible when the existing roof is dry, stable, and suitable for another system. If the roof is saturated or failing, a tear-off may be the better option.

Many flat roof leaks originate around seams, flashing, drains, penetrations, rooftop equipment, and areas where water collects. Because water can travel beneath a roofing system before appearing inside the building, identifying the true source of a leak often requires a professional inspection.

EPDM is a rubber roofing membrane known for flexibility and long-term serviceability. TPO is a heat-welded membrane commonly used on commercial flat roofs. PVC is a durable single-ply system often selected for buildings with demanding roof conditions. 

Owners Josh Skelly and Dennis Nielsen shaking hands

Work With Experienced Flat Roof Restoration Specialists

Dennis Nielsen, President, brings decades of hands-on experience evaluating, restoring, and protecting commercial roofing systems throughout Colorado. His expertise spans liquid-applied coating systems, flat roofing, leak diagnostics, and preventative maintenance. Dennis built Guardian Roof Coating around an inspection-first approach, helping property owners make smart, long-term performance decisions without unnecessary replacements.

Meet Dennis

Joshua Skelly, CEO and Colorado native, brings 13 years of specialized industry experience in flat and low-slope roofing systems. Having founded Guardian Roof Coating on principles of honesty, quality workmanship, and customer trust, Josh ensures every project meets high standards. His hands-on background in leak detection, single-ply systems, and roof restoration guarantees dependable, long-lasting results.

Meet Joshua

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