Finding the right roofing solution can feel overwhelming with so many options out there. You want something that’s not only durable and energy-efficient but also cost-effective and visually appealing. That’s where TPO comes in—a fast-growing favorite roofing material for both commercial and residential buildings.
To help you make the best decisions for your commercial roofing needs, in this blog post, we’ll walk you through everything you need to know about TPO roofing systems, covering their composition, key benefits, installation process, and maintenance tips.
What Is TPO Roofing
Thermoplastic polyolefin (TPO) is a widely used single-ply membrane for both commercial and residential settings. Known for its flexibility and durability, this roofing material is composed of three layers: a TPO polymer base, a polyester-reinforced scrim, and a TPO compounded top ply.
A key benefit of a TPO roofing system is its energy efficiency. The reflective surface helps reduce cooling costs by reflecting UV rays away from the building. Additionally, TPO roofs are easy to install, making them a cost-effective solution for flat or low-slope roofs. With a lifespan ranging from 15 to 30 years, TPO roofing systems are not only long-lasting but also environmentally friendly. They are fully recyclable and most are chlorine-free, contributing to lower carbon emissions.
A typical TPO roofing system consists of:
- TPO Membrane: The main waterproof layer, available in thicknesses like 45, 60, or 80 mils.
- Insulation: Usually made from polyisocyanurate foam, it helps control indoor temperature.
- Cover Board: Positioned between the insulation and membrane to enhance puncture resistance.
- Adhesive or Fasteners: Used to secure the membrane, options include bonding adhesives or fasteners.
- Vapor Barrier: Optional layer recommended for concrete decks to prevent moisture issues.
- Underlayment: Added for extra fire resistance or specific installation needs.
Average TPO Roofing Cost
On average, TPO roofing costs between $5 to $7 per square foot, including materials and installation. A standard 1,500-square-foot residential roof totals $7,500 to $10,500. Prices can vary based on roof size and complexity, starting around $6,500 and going up to $24,000.
What Are The Pros And Cons Of A TPO Roofing Membrane
Exploring the pros and cons of a TPO roof can help you determine if it’s the right solution for your building needs.
| PROS | CONS |
| Energy Efficiency The reflective surface helps save on cooling costs. | Potential for Premature Aging Some products may age early when exposed to heat and UV rays. |
| Cost-Effectiveness It is affordable and often cheaper than alternatives like PVC or EPDM. | Slippery When Wet Roofs can be slippery during rain, posing safety risks. |
| Durability This roofing material is strong and can last 20 to 30 years. | Limited Performance in Extreme Conditions Performance may decrease in very hot areas. |
| Easy Installation Its lightweight nature allows for quick installation with large sheets. | Installation Requires Proper Drainage Good drainage is crucial to prevent standing water and damage. |
| Low Maintenance Minimal care is needed, as it resists mold and dirt. | Limited Color Retention Some colors may fade over time due to UV exposure. |
TPO vs. Other Roofing Materials
Understanding how TPO stacks up against other roofing options can guide you in choosing the best material for your needs.
1. TPO vs. PVC
When comparing TPO and PVC, both are single-ply membranes but differ in composition and performance. PVC (polyvinyl chloride) is very durable and resistant to chemicals, with a lifespan of 20 to 30 years. While TPO is generally cheaper and more energy-efficient, PVC’s higher initial cost may be justified by its long-lasting performance. The right choice depends on your project’s needs, budget, and desired longevity.
2. TPO vs. EPDM
TPO vs. EPDM (ethylene propylene diene monomer) highlights two distinct roofing options. TPO is known for its energy efficiency due to its reflective properties. In contrast, EPDM is a rubber-based material known for its flexibility and durability in harsh weather. EPDM typically lasts longer, around 30 years, but may require more maintenance. Many prefer TPO for its lighter weight and easier installation.
3. TPO vs. Modified Bitumen
Comparing TPO and modified bitumen, each material serves different purposes for flat roofs. Modified bitumen is asphalt-based, offering excellent waterproofing and durability but can be heavier and more complex to install. TPO, on the other hand, is lighter and more reflective, which can help reduce energy costs. While modified bitumen roofs last about 15 to 20 years, TPO roofs generally offer similar longevity with easier installation and lower initial costs.
What Are The Different Ways To Install A TPO Roof?
Installing TPO can change based on your roof’s size and condition. There are three main methods for installation:
1. Mechanically Fastened
In this method, the TPO membrane is attached to the roof deck using screws or plates. This approach is great for areas with high winds since the fasteners help keep the membrane secure.
2. Fully Adhered
This method involves gluing the TPO membrane directly onto the roof insulation or deck with an adhesive. It provides a smooth, wrinkle-free finish and works well for buildings with complex roof shapes.
3. Ballasted
For this installation, the TPO membrane is placed on the roof and weighed down with heavy materials like gravel or pavers. This method is less common but can be effective for roofs that need extra stability.
The Importance of Seam Welding
A key part of TPO installation, no matter the method used, is seam welding. The seams of the TPO membrane are heat-welded with special equipment to form a strong, waterproof bond. This creates a tight seal that prevents water from leaking and helps extend the roof’s lifespan.
How To Install A TPO Roofing
Along with knowing the installation methods, a clear understanding of the TPO roofing installation process ensures a smooth and efficient setup for your roof.
Step 1: Roof Inspection and Preparation
> Inspect the Roof:
Start by checking the roof for any damage, such as leaks or structural issues.
> Clean the Surface:
Remove all debris, dirt, and old roofing materials. A clean surface helps the TPO membrane stick better.
> Make Repairs:
Fix any damage to the roof deck or substrate. This could mean replacing damaged areas to create a stable base for the new roofing system.
Step 2: Substrate Installation
> Choose Insulation:
Select insulation that fits your climate and building type, like rigid board insulation. This improves thermal resistance and energy efficiency.
> Install Insulation Boards:
Place the insulation boards tightly together, ensuring no gaps wider than 1/4 inch. Secure them according to manufacturer instructions, usually with fasteners or adhesive.
> Add the Roof Deck:
Place roof decking boards over the insulation, creating a solid base for the TPO membrane.
Step 3: TPO Membrane Application
> Roll Out the Membrane:
Unroll the TPO membrane over the prepared surface. Make sure seams overlap as specified, usually by at least 5 inches.
> Secure the Membrane:
Fasten the membrane using any of the methods we have mentioned above.
Step 4: Flashing and Edge Detailing
> Add Flashing:
Install flashing around roof penetrations like vents and chimneys to prevent leaks. Ensure it’s properly welded or adhered.
> Secure Edges:
Fasten the edges of the TPO membrane with fasteners to stop wind uplift and water entry.
Step 5: Quality Control and Inspection
> Inspect the Installation:
Once finished, carefully check all seams, flashing, and edges for any problems that may need fixing.
> Make Adjustments:
Immediately address any issues, such as re-welding seams or adding adhesive where necessary.
Step 6: Final Clean-Up
> Clean the Site:
Remove any leftover materials, tools, or debris. A clean area looks better and protects the new roof.
> Check for Loose Items:
Ensure no tools or materials are left on the roof that could cause damage.
How To Clean TPO Roof
After your TPO roof is installed, it’s crucial to maintain it. Keeping it clean is an easy way to prevent damage and ensure it’s protecting your building effectively.
Preparation
1. Check Manufacturer Guidelines:
Always start by reviewing the manufacturer’s recommendations for cleaning products and methods. This helps avoid damage to the membrane and keeps your warranty intact.
2. Protect Surroundings:
Cover low curbs, base flashing, and nearby plants to prevent harm from cleaning solutions or water runoff.
Cleaning Process
3. Gather Supplies:
| Supplies Checklist |
| Low-pressure power washer (max 2000 psi) |
| Mild, non-abrasive detergent or a specialized TPO cleaner |
| Soft-bristle push broom or long-handle brush |
| Rags or towels for drying and wiping |
4. Initial Rinse:
Use the power washer on the lowest setting to remove loose dirt and debris without any cleaning solution.
5. Apply Cleaning Solution:
- Mix the mild detergent with water according to the manufacturer’s instructions.
- Use the soft-bristle brush to scrub the surface gently, focusing on stained areas.
6. Rinse Thoroughly:
After scrubbing, rinse the roof completely with the power washer to remove all detergent residue. Leaving cleaning solution on the surface can cause buildup over time.
7. Inspect for Damage:
After cleaning, visually check the roof for signs of wear, such as frayed seams, punctures, or damaged flashings. Address any issues quickly to prevent further damage.
Maintenance Tips
Here are some commercial roof maintenance tips:
A. Regular Cleaning Schedule:
Clean your TPO roof at least twice a year, ideally after major seasonal changes, to prevent dirt buildup and algae growth.
B. Trim Surrounding Trees:
Keep branches trimmed to minimize debris falling onto the roof, which can lead to mold and other issues.
C. Professional Inspections:
Schedule annual inspections with a roofing professional to catch potential problems early and maintain your roof’s integrity.
Is A TPO Roofing System Right for You?
Overall, TPO is a versatile option for commercial applications, especially on flat or low-slope roofs, because:
1. Budget:
It’s cheaper than high-end single-ply membranes and provides long-term energy savings.
2. Building Size and Use:
TPO is ideal for large buildings with high energy needs, including retail stores, warehouses, and manufacturing plants.
3. Compatibility:
TPO integrates easily with existing roofs and can often be installed over old materials, saving on tear-off costs.
Trust All Around Roofing, Siding & Gutters for Quality TPO Roof Installations
We hope you now know the basics of TPO roofing systems and are better equipped to make informed decisions about your building’s roofing needs. Choosing TPO for your roof can lead to long-term savings and improved building performance.
Need a trusted roofing contractor for your commercial property? Choose All Around Roofing, Siding & Gutters! We specialize in durable, energy-efficient commercial roofing services. With a focus on quality and customer satisfaction, we’re here to protect your investment. Contact us today at (937) 902-2839 for an instant quote and see the difference!
