TPO Vs. EPDM – What’s Right For Your Commercial Building

If you are in the market for a new roof for your commercial building, TPO and EPDM are the two most popular and widely-used options you will come across. Although TPO and EPDM are single-ply roofing membranes, they have their strengths and weaknesses. This post discusses both options in detail to help you choose the right commercial roof for your business.

TPO Roof

TPO, or Thermoplastic Polyolefin, is rapidly gaining significant popularity as the preferred roofing choice for commercial buildings. The membrane comprises three layers, a TPO polymer base, a polyester-reinforced fabric center or scrim, and a top layer of thermoplastic polyolefin. Each of these layers is made from ethylene-propylene rubber and polypropylene polymerized together. Manufacturers use fillers such as fiberglass, talc, and carbon fiber to add strength and flexibility. It is a relatively new roof covering and can either be fastened mechanically or affixed using an adhesive.

TPO Roof Pros

• TPO roofs reflect sunlight, increasing the efficiency of the cooling system
• Easy repair and maintenance
• Cost-efficient
• Durable
• 100% recyclable
• The hot-air welded seams add to the strength and resilience
• High resistance to punctures, chemicals, dirt, bacteria, and algae

TPO Roof Cons

• Excessive heat can cause the roof to shrink
• Poorly welded seams can develop cracks
• A relatively young technology

EPDM Roofs

EPDM or Ethylene Propylene Diene Monomer is a single-ply synthetic rubber roofing membrane. EPDM has been around for a long time and is ideal for regions experiencing frequent hail storms. The two main ingredients used in EPDM roofs are ethylene and propylene, obtained from oil and natural gas. EPDM is available in different thicknesses and can be mechanically fastened, fully adhered, and ballasted.

EPDM Pros

• Affordable
• Superior durability
• Easy to install and repair
• Suitable for all climates
• Environmentally-friendly
• Withstands rain, sunlight, snow, and temperature fluctuations

EPDM Cons

• Poor resistance to chemicals, gasoline, kerosene, animal fats, and oil
• Installation requires expertise and skills
• The dark color can absorb heat and cause the cooling system to work hard

TPO vs. EPDM

The choice between TPO and EPDM will depend on several factors, including geographical location, weather elements like rain, snow, heat, and hail, durability, cost, maintenance requirement, and energy efficiency. 

Cost

EDM is a more economical option than TPO. Thicker membranes are expected to last longer.

Lifespan

As TPO is a relatively new and experimental product, determining its longevity is difficult at this stage. EPDM roofs can last 25-30 years with correct installation and proper maintenance.

Durability

EPDM is more reliable and has a strong reputation for its durability. It performs better than TPO in colder regions and is resistant to UV rays, oxidants, and unfavorable weather conditions. The issue with TPO is its formulation is undergoing changes continuously, which fails to provide consistent performance. Different TPO membranes offer different performances. It does not perform well in higher heat and fails to endure solar overload.

Ease of installation 

An EPDM roof requires no special equipment for installation, making it faster and easier to install than TPO roofs. 

Energy efficiency

TPO roofing membrane offers excellent energy efficiency. They are known as cool roofs, and their colors come formulated with reflective properties. Commercial properties can save money on heating and cooling costs with TPO roofs. Darker-colored EPDM roofs absorb heat. Although they come in white and lighter colors, their energy and financial savings do not match TPO roofs.

Seek help from a commercial roofing contractor if you are still indecisive about the correct type of roof for your commercial building. Professional roofers can suggest the ideal roofing system for your business needs.