What Is TPO Roofing?

March 4, 2025

TPO roofing, or Thermoplastic Polyolefin, is a single-ply roofing membrane commonly used on flat and low-slope roofs due to its durability, affordability, and energy efficiency. Made from a blend of polypropylene and ethylene-propylene rubber, TPO is lightweight, resistant to UV rays and chemicals, and highly reflective, making it an excellent option for reducing cooling costs. Its heat-welded seams provide superior waterproofing, and with proper installation, a TPO roof can last 20 to 30 years, making it a popular choice for both commercial and residential buildings.

What Is TPO Roofing?

TPO is a synthetic roofing membrane designed to provide strong protection against the elements while remaining cost-effective. It is installed as a single-ply layer, meaning it consists of one durable sheet rather than multiple layers like traditional roofing systems. TPO is typically available in white, light gray, or tan, with white being the most reflective, helping to reduce heat absorption and lower energy costs. TPO has gained popularity in both commercial and residential roofing because it provides many of the benefits of more expensive materials like PVC roofing, but at a lower price point.

Benefits of TPO Roofing

TPO roofing has become a top choice for property owners due to its combination of affordability, durability, and efficiency. Here are some of its key advantages:

1. Energy Efficiency: TPO roofing is highly reflective, meaning it can bounce sunlight away from the building, reducing heat absorption and lowering cooling costs in warmer months. Many TPO membranes meet Energy Star® and Cool Roof Rating Council (CRRC) standards, making them an eco-friendly choice.

2. Cost-Effective: Compared to other flat roofing materials like EPDM (rubber roofing) or PVC, TPO offers a balance of affordability and performance. It provides similar benefits to PVC but at a lower cost, making it an excellent investment.

3. Durability & Longevity: TPO roofing is highly resistant to UV radiation, chemicals, punctures, and tears. It stands up well to extreme weather conditions, including high winds, heavy rain, and temperature fluctuations. With proper installation and maintenance, a TPO roof can last between 20 to 30 years.

4. Low Maintenance: Unlike traditional roofing materials that require frequent upkeep, TPO roofs resist mold, algae growth, and dirt buildup, making them easier to clean and maintain over time.

5. Strong Seams & Waterproofing: TPO membranes are installed using heat-welded seams, which create a stronger, more watertight bond than traditional adhesive seams used in other roofing systems. This helps prevent leaks and water damage.

How Is TPO Roofing Installed?

Installing TPO roofing is a multi-step process that requires proper preparation to ensure durability and performance. Here’s an overview of how it’s done:

1. Roof Surface Preparation: Before installation, the existing roof is cleaned and prepped to ensure proper adhesion. If necessary, old roofing materials may need to be removed.

2. Insulation Layer Installation: A layer of polyisocyanurate (ISO), expanded polystyrene (EPS), or extruded polystyrene (XPS) insulation is placed beneath the TPO membrane. This insulation improves energy efficiency and creates a stable surface for the membrane.

3. TPO Membrane Placement: The TPO membrane is rolled out over the insulation and secured using one of three methods: fully adhered, mechanically attached, and ballasted.

4. Heat-Welded Seams: A hot-air welder is used to fuse the seams together, creating a strong, watertight bond that prevents leaks.

5. Final Inspection & Cleanup: After installation, the roof is thoroughly inspected to ensure all seams are properly welded, and the surface is free of defects.

How Much Does TPO Roofing Cost?

The cost of TPO roofing depends on factors such as roof size, material thickness, and labor costs. On average, the TPO membrane itself costs $5 to $8 per square foot, with installation labor adding $2 to $4 per square foot, and insulation ranging from $1 to $3 per square foot. This brings the total installed cost to approximately $7 to $12 per square foot. For a 2,000-square-foot roof, homeowners and businesses can expect to pay between $14,000 and $24,000, depending on the specific materials used, the complexity of the installation, and regional labor rates.

Potential Drawbacks of TPO Roofing

While TPO roofing has many advantages, there are a few considerations to keep in mind:

Inconsistent Quality Among Manufacturers – Some brands may produce lower-quality TPO membranes that don’t last as long. It’s important to choose a reputable manufacturer when installing a TPO roof.

Can Be Prone to Shrinking Over Time – Some low-quality TPO membranes may shrink, causing stress on the seams and leading to leaks.

Requires Professional Installation – Proper installation is critical. If TPO roofing is installed incorrectly, it may develop leaks or premature wear. That’s why hiring an experienced roofing contractor is essential.

Is TPO Roofing Right for You?

If you need a new roof for your home or business in Cheshire, CT, and surrounding areas, Bartlett Contracting, LLC is here to provide professional installation and top-quality materials for a long-lasting, energy-efficient roof. With over 20+ years of experience, we ensure precision and durability in every project. Reach out to our team today to learn more about how we can help with your roofing needs!