EPDM stands for Ethylene Propylene Diene Monomer, a synthetic rubber obtained from oils and natural gases. EPDM is very similar to Polyvinyl Chloride (PVC), but EPDM is rubber while PVC is plastic.

EPDM is also very similar to Thermoplastic Polyolefin (TPO), and both are often exchanged in a discussion. The EPDM roofing system has been growing in the market over a few decades because of its durability and being an inexpensive roofing option.

Both of the traits boosted its growth and made it the most common commercial flat roof choice in the market today. The EPDM roofing system is becoming the favorite choice for customers.

EPDM Flat Roof Applications

Preparing the Surface 

The vital part of knowing how to apply EPDM roofing lies in starting with a clean surface. This includes removing all dirt, grease, debris, and other various contaminants from the surface. The surface also needs to be dry. Lastly, any existing coverings, such as asphalt layers, are needing to be removed completely.

If you are not sure about what you’re dealing with, it’s always better to let the professionals handle them. Incorrect EPDM application may not improve your current roofing system.


To maintain the EPDM sheets perfectly straight and minimize the creases or bubbles, you need to measure and mark the project area using a pencil or chalk.

EPDM Sheet Application

Applying half a sheet of EPDM at a time is ideal. Start with the edges facing the walls and work towards the roof’s edge.

If you’re using a water-based adhesive, it will involve spreading the adhesive onto the roof using a paint roller. While the adhesive is still wet, you can roll the EPDM sheet forward and begin the next portion of the project.

EPDM Flat Roof Applications

If you’re using a bonded adhesive, it needs to be applied to both the roof surface and the sheet itself. This will allow you to work with larger sections, which needs to dry from 5-20 minutes before reapplying the sheet.

Finishing Touches

The final edges will take time to get correctly. This will involve several processes:

  • Removing excess membranes
  • Sealing all trim using a silicone sealant
  • Applying bonded adhesive to roof and wall edges
  • Fastening the drip edge, wall trim and gutter trim with screws

When performed correctly, these finishing touches will leave your roof beautiful and capable to handle rough weather for years to come.

EPDM Roof Benefits

Here are some of the benefits of EPDM for your flat roof over other materials.

1) Lasts Longer

The durable materials of rubber roofing offer high-quality performance over a long time. It fits for flat roofs and is excellent at keeping water from penetrating the structure and preventing leaks.

2) Simple Installation

EPDM has been engineered for ease of application and uses fewer seams than other types of roofing. This allows for a smoother and simpler application process, making it a suitable candidate for replacing roofs in occupied structures. Its simplicity allows new flat roofs to be applied with minimal disruption to your schedule.

3) Easy to Maintain

EPDM requires little to none maintenance after application. The waterproof membranes are permanently flexible and have a long life expectancy. It is also resistant to aging, but making regular maintenance is required to ensure it works properly all year long.

4) Eco-Friendly

If you’re concerned for the environment, EPDM is eco-friendly. You’re preventing yourself from using petroleum-based roofing, and EPDM utilizes recycled products in its manufacture. EPDM also reflects sunlight and helps lower your structure’s energy consumption.