How to Seal Seams on a Rubber Roof

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Ethylene propylene diene monomer (EPDM) rubber often serves as an efficient alternative to traditional roofing methods due to its durability, UV resistance and simple installation. You'll find this lightweight material easy to work with and maintain. Seam failures indicate aging rubber; because EPDM rubber should provide a roof with maximum insulation, the most important step to installing a rubber roof is sealing the seams. Apply EPDM double-sided seam tape to all overlapping seams to create the strongest bond possible.

Things You'll Need

  • Self-priming seam tape
  • Rag/towel
  • Roller
  • Fold back the topmost sheet of EPDM to expose the seam area. Use a rag or a towel and warm water to wipe away any residue, dust, or debris.

  • Apply the seam tape by unrolling it along the length of the seam with the adhesive side down. Use moderate pressure to set the tape into place in order to avoid trapping air underneath it.

  • Fold the top layer of rubber over the seam tape onto the side with the release paper. As you reach under the rubber to remove the paper, press down on the rubber along the top of the seam to bond it to the tape. This will prevent wrinkles from forming at the seam.

  • Use a hand roller to smooth the rubber along the entire length of the seam for reinforcement. You will then have successfully sealed the seams on your rubber roof.

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