EPDM roofing: The future of sustainable roof renovation

What is EPDM roofing?

EPDM (Ethylene-Propylene-Diene-Monomer) is a synthetic rubber developed specifically for applications where weather resistance is critical. In roof renovations, it is used as a waterproof membrane for flat roofs.

The main features that distinguish EPDM from traditional roofing are:

• Exceptional elasticity: EPDM can stretch up to 400% without cracking, which is ideal for accommodating roof surface movement.
• UV and ozone resistance:The rubber compound does not harden under the influence of sunlight.
• Temperature resistance:Functions smoothly at temperatures between -40°C and +120°C.
• Seamless application: possible to install in one piece, which significantly reduces the risk of leaks.

Why choose EPDM for a roof renovation?

Durability and longevity

With an average lifespan of 50+ years, EPDM far surpasses traditional roofing materials such as bitumen (15-20 years). This makes it particularly cost-effective over the long term, despite a potentially higher initial investment.

An EPDM roof also requires minimal maintenance. An annual inspection is sufficient to detect any problems early. Most damage is easily repaired with special repair kits.

Environmentally friendly character

EPDM scores well on several ecological factors:

• Energy-efficient production compared to other roofing materials
• Fully recyclable at end of life
• Contributes to energy savings through good insulation values
• Can be combined with green roof solutions for additional environmental benefits

Placement and technology

EPDM can be installed in a variety of ways:

1. Bonded system: The membrane is fully bonded to the substrate.
2. Mechanically attached system: Suitable for lighter roof structures.
3. Loose ballasted system: Ideal for larger roofs where the membrane is weighted with gravel or tiles.

In renovations, the glued system is the most popular because of its simplicity and reliability. The rubber is cut to size, rolled out and then permanently attached with special adhesive.

EPDM versus traditional roofing materials

Compared to popular alternatives such as bitumen, PVC and TPO, EPDM offers several advantages:

Lifetime:
- EPDM: 50+ years
- Bitumen: 15-20 years
- PVC: 20-30 years
- TPO: 20-30 years

Elasticity:
- EPDM: Very high
- Bitumen: Low
- PVC: Average
- TPO: Average

Environmental Impact:
- EPDM: Low
- Bitumen: High
- PVC: Medium
- TPO: Low-Medium

Maintenance:
- EPDM: Minimum
- Bitumen: Regular
- PVC: Periodic
- TPO: Periodic

Fire Resistance:
- EPDM: Good
- Bitumen: Moderate
- PVC: Good
- TPO: Good

Cost considerations

The price of an EPDM roof renovation is determined by several factors:

• Size and complexity of the roof
• Required preparatory works (removal of old roofing)
• Quality of the chosen EPDM product
• Placement method
• Any additional insulation

Although the initial investment may be higher than with traditional materials, the long life and low maintenance costs reduce the total cost of ownership.