There are several types of industrial and commercial roofing materials. In this 5 part series we cover each of the following: EPDM, thermoplastic, built-up , modified bitumen, and metal. Each material has its own advantages and disadvantages and any of them can be the right choice depending on your building, climate, and budget.
In this installment, we look a popular material for commercial buildings: EPDM.
What is EPDM?
The EPDM (ethylene propylene diene monomer) roofing system is a synthetic rubber based material used very successfully on large commercial buildings. While not a new invention, EPDM is still relatively new to the roofing industry, yet has become one of the top choices for low slope roofing over the last 40 or so years. It is made of rubber similar to that used as seals in cars (around doors or the trunk) or the seals around the doors of walk-in freezers or fridges.
EPDM Background
The EPDM systems have remained mostly unchanged for the last several years though a few improvements to adhesives and the reflective qualities of the material have enhanced performance. Many of the EPDM systems you will see today have been around since the 70s and though the originals don’t have a few minor updates featured by current versions, they have proven to be long lasting and durable. Since there are EPDM roofs still in use which are 40 years old, a 30 year guarantee is often available upon installation.
Advantages of EPDM
There are many great features about EPDM roofing systems which make them attractive to building managers.
- Very durable and long lasting
- Low cost life-cycle
- Rapid installation
- Environmentally friendly
- Flexible and versatile
- Material is nearly 100% recyclable
- Low fire danger
- Nearly waterproof when installed in one piece
This is a potent lineup of advantages which has made EPDM’s wildly popular as a low slope commercial roofing option.
Disadvantages of EPDM
As with all types of roofing, there are also drawbacks.
- HVAC units, piping, and other fixtures can cause the possibility of a leak. The roof may need to be resealed.
- Leaks, though rare, can be hard to find if they do occur
- Unqualified roofers incorrectly installing EPMD
To the last point, this is a common occurrence. Double check your roofing company to verify that they have experience in rubber roofs. This is extremely important as this is not a simple shingle residential roof.
EPDM Ballasted System
The most frequently used EPDM is the ballasted system (about 35% of modern commercial EPMD installations). This system starts with approved roofing deck at the bottom, upon which sufficient insulation is placed. The contractor lays the EPDM panel on top of the insulation. Smooth stone or concrete pavers hold the panel in place. This creates a low cost, durable, water tight, heat reflecting, and fire proof roof. EPDM roofs are often a good base for solar panels.
When you are deciding what material to use for your commercial building, you should consult with an experienced, licensed roofing contractor. All Weather Tite of Port Charlotte, Florida, is a GAF Master Elite® certified roofing contractor. This guarantees that we are fully licensed, fully insured, have a proven reputation for quality, and are committed to ongoing professional training. Check out the commercial roofing section of our website. You can request a free estimate and we will be happy to explain your options regarding recoating your roof. Our expert services cover all aspects of roofing from new roofs to minor repairs.