Installing Your EPDM Rubber Flat Roof

FAQ’s about installing your EPDM roof

  • Does the EPDM membrane have an up and downside?
  • Does the membrane require a protective top coat?
  • Is the installation of the membrane weather dependent?
  • Why do bubbles or wrinkles form after the membrane is adhered?
  • Are specific tools required for installation?
  • Can the membrane be in contact with a hot pipe penetration (e.g., boiler flue)?
  • Are specific tools required for installation?
  • Are any precautions required during installation?

Does the EPDM membrane have an up and downside?

No, there is no difference between the top and bottom of the standard and premium-grade membrane. Fire-rated (FR grade) membrane does have an up-and downside. There is clear wording stating which side this membrane should be laid.

Does the membrane require a protective top coat?

No, the membrane is resistant to UV rays and ozone and requires no protective top coat.

Is the installation of the membrane weather dependent?

Yes. Although it can be fitted in the rain, the minimum temperature for application of the adhesive is +5ºC and maximum humidity is 80%. Check with your local weather forecast service, and if the temperature is likely to drop below freezing during the 48 hours after application, you should use Firestone Bonding Adhesive.

Why do bubbles or wrinkles form after the membrane is adhered?

Not allowing the adhesives enough ‘flashing off’ time can lead to solvents in the adhesives causing bubbles or wrinkling. The wet adhesive distorts the membrane and causes a ripple-effect.

Bubbles do tend to recede during the drying and curing process, but the membrane is unlikely to be effectively adhered in these areas, and bubbles could reappear during weather changes.

Are specific tools required for installation?

Yes. There are just a few tools required for installation of EPDM rubber roofing systems:

  • Quickscrubber tool for application of the QuickPrime Plus
  • Silicon hand roller and penny roller for application of the Quickseam products
  • Broom for clearing the roof deck
  • In some instances, a power-washer would be useful – to remove grease or oil from the roof deck – but not essential.

Can the membrane be in contact with a hot pipe penetration (e.g., boiler flue)?

The use of double-skinned penetrations is required.

Are any precautions required during installation?

  • You should use both Bonding Adhesive and QuickPrime Plus in a well-ventilated environment
  • Do not use ignition sources near these products
  • Do not smoke during the installation process
  • Firestone recommends wearing gloves when using QuickPrime Plus

For further information, please consult the Material Safety Data Sheets as well as the information shown on the product labels.