SYSTEMS OVERVIEW
What is TPO Roofing?
Thermoplastic Polyolefin, commonly called TPO, is a single-ply roofing membrane widely used on commercial and industrial buildings with low-slope or flat roofs.
TPO membranes are typically installed over insulation and secured using mechanical fasteners, adhesives, or other approved attachment methods. The seams are heat-welded together to create a continuous, watertight roofing surface.
Because TPO is lightweight, flexible, and available in reflective colors such as white, it has become a popular option for both new commercial construction and roof replacement projects.
Benefits & Considerations of TPO Roof Systems
Benefits of TPO
Energy Efficiency
Light-colored TPO membranes can reflect a significant amount of sunlight rather than absorbing it, helping reduce heat buildup on the roof during warmer months.
Strong, Welded Seams
TPO seams are heat-welded to create a durable bond between membrane sections and help protect the building against water intrusion.
Resistance to UV Exposure
TPO is designed to withstand prolonged exposure to sunlight and the elements, making it well suited to exposed commercial roof surfaces.
Flexible Installation Options
TPO systems can be designed for a variety of roof configurations and installed using different attachment methods based on the building and project requirements.
Cost-Effective Commercial Roofing
For many properties, TPO provides an attractive balance of installation cost, energy performance, durability, and maintenance requirements.
Important Considerations
- The performance of a TPO roof depends heavily on proper system design and installation. Flashings, penetrations, seams, drainage areas, rooftop equipment, and transitions all require careful attention.
- The roof should also be inspected periodically, especially after severe weather or when contractors have been working around HVAC units and other rooftop equipment.
- Asscher Roofing can evaluate your building and help determine whether TPO is the right roofing system for your property.
IDENTIFY ISSUES EARLY WITH ROUTINE MAINTENANCE
TPO Roof Maintenance Expectations
Commercial roofing systems perform best when problems are identified early. A TPO roof should generally receive routine professional inspections to look for issues such as:
1. Damage from foot traffic or rooftop work
2. Loose or damaged flashing
3. Problems around roof penetrations
4. Debris or standing water near drains
5. Seam or membrane damage
6. Deteriorated sealants
7. Storm-related punctures or impact damage
Keeping drains and drainage paths clear is also important for preventing unnecessary water accumulation.
If a problem is discovered, localized TPO roof repairs may be possible without replacing the entire roofing system. Regular inspections and timely repairs can help protect the roof and reduce the likelihood of more extensive damage.
Related Commercial Roofing Services
Related services include:
Commercial Roof Inspections
Identify existing damage, potential problem areas, and maintenance needs before they develop into larger issues.
TPO Roof Repair
Address punctures, damaged membrane, flashing concerns, leaks, and other localized roofing problems.
Commercial Roof Replacement
Replace aging or failing commercial roofing with a properly designed roofing system built around the needs of your property.
Commercial Roof Maintenance
Routine inspections and preventative maintenance can help extend roof performance and identify repairs before they become more disruptive.
Storm Damage Roofing Services
Assess commercial roofs following hail, wind, and severe weather to identify visible and less obvious damage.
COMMERCIAL SYSTEMS
Roof Systems for Commercial Buildings
Check out our commercial roofing systems chart and guide tabs for a concise, practical guide to the most common commercial roofing systems. You can view what they are, how long they shine, key advantages, and what to watch out for.
| System | Lifespan | Cost | Key Advantage |
| EPDM | 20-30 Years | $ | Low cost, easy repair |
| TPO | 15-25 Years | $$ | Energy Efficiency |
| PVC | 20-30 Years | $$$ | Chemical Resistance |
| METAL | 40-70 Years | $$$$ | Longevity |
EPDM
TPO
PVC
METAL
EPDM (rUBBER)
What it is: Single-ply synthetic rubber membrane (usually black).
Pros:
Cost-effective
Excellent weather resistance
Easy repairs
Cons:
Black surface absorbs heat (higher cooling costs)
Seams rely on adhesives/tapes
Best for: Budget-conscious projects and large flat roofs.
TPO (Thermoplastic Polyolefin)
What it is: White, reflective single-ply membrane with heat-welded seams.
Pros:
Energy efficient (reflects UV)
Strong seams (heat-welded)
Resistant to mold/dirt build up
Cons:
Quality varies by manufacturer (Asscher sources the best quality TPO)
Can age faster in extreme conditions
Best for: Energy-efficient buildings in warmer climates.
PVC (Polyvinyl Chloride)
What it is: Durable single-ply membrane similar to TPO but more chemical-resistant.
Pros:
Highly resistant to chemicals, grease, and fire
Strong, long-lasting seams
Reflective and energy-efficient
Cons:
More expensive than TPO/EPDM
Can become brittle over time
Best for: Restaurants, factories, or buildings with chemical exposure.
METAL
What it is: Panels made of steel, aluminum, or other metals (often standing seam).
Pros:
Extremely long lifespan (40–70 years)
Durable against weather and fire
Low maintenance
Cons:
Higher upfront cost
Noise (rain/hail) if not insulated
Best for: Sloped commercial roofs or long-term investments.
The right commercial roofing system depends on more than the roofing material itself. Building design, drainage, insulation, existing roof conditions, budget, and long-term plans should all be considered before selecting a system.
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