EPDM seam repair versus replacing the membrane

A damaged seam may be addressed locally when the surrounding assembly is suitable. Widespread deterioration can require a different scope.

Ask the roofer to document the seam and the material nearby. The work that makes sense for one open seam can differ from work needed when several areas have deteriorated or moisture is suspected.

Talk with Dekoven Roofing about which materials and installation options may fit your roof.

Two questions, one decision

When an EPDM seam opens, the choice is between repairing that seam and replacing the membrane. The answer depends on how widespread the problem is and what shape the membrane is in.

When a seam repair makes sense

• The membrane is otherwise flexible and intact.
• The opening is limited to one or two seams.
• The cause can be corrected, such as ponding or movement at a detail.

When replacement is worth discussing

• Seams are opening in many places.
• The membrane is brittle, cracked or shrinking.
• Insulation below is wet.
• Repairs keep recurring in the same areas.

Ask for both options

A good estimate describes what a repair covers and what a replacement would involve, so you can compare costs against the roof's remaining life. Ask the roofer to mark the affected seams on a roof diagram or photos.

Frequently asked questions

How long does a seam repair last?

It depends on the cause and the condition of the surrounding membrane. Ask what the roofer expects and what the repair is warranted for.

Does repair affect an existing warranty?

It can. Share any manufacturer or contractor paperwork before work begins.

Can ponding cause seam failure?

Standing water can stress seams and adhesives, so drainage should be reviewed along with the repair.

Related: Ask which roofing system fits your property