INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Jobs

Coating over and existing EPDM roofing membrane

Coating over and existing EPDM roofing membrane

(OP)
Hi Everyone,

Looking to get some information from anyone who has worked with existing roof structures before. Looking at re-coating an existing EPDM roof membrane that is approximately 20 years old. My only concern is that the roof is ballasted and the client does not want to dispose of the ballast. Can I recommend moving a section of the ballast, re-coating the existing EPDM membrane, and redistribute the existing ballast over the new membrane? I've been told that cutting the existing EPDM membrane and then re-coating is an option. Was wondering if anyone had any other information on this topic? Thank You!

RE: Coating over and existing EPDM roofing membrane

I can't imagine recoating an EPDM membrane for a new roof that's supposed to be permanent (or even temporary). I wouldn't paint a balloon from a birthday party 2 weeks ago because it's kinda small & wrinkly & I hope with some lipstick it's okay for the next party. If the membrane has served its purpose and lived its life, put it out of its misery & replace it. Incidentally, I removed a 25 year old EPDM membrane from my own back porch roof 3 weeks ago, & if the membrane itself is your problem I'm surprised. The membrane was in perfect shape but the flashings, joints, and details were in trouble.

RE: Coating over and existing EPDM roofing membrane

OBG's experience with EPDM is pretty much mine... membrane should be replaced, but, is likely in excellent condition.

Dik

RE: Coating over and existing EPDM roofing membrane

The first two responses know a lot more about this subject than I do. But I do know some things. No roofer worth a poop is going to warrant just a new coating. If the roof leaks after they leave, they'll blame the flashings, curbs and whatever else there is to blame. Tell your client to bite the bullet, get a new roof. It's not that expensive. I looked up modified bitumen roofs a week or so ago and they were about $5.00 a square foot. Recoating (whatever that is) is probably half that, maybe more. There's a lot of competition, so you'll get a good price. And the warranty clock resets.

RE: Coating over and existing EPDM roofing membrane

(OP)
Looks as though the client will be replacing the EPDM membrane after all. Thanks for all of the information guys, it is greatly appreciated!

RE: Coating over and existing EPDM roofing membrane

Glad to hear it is being replaced. Ballasted EPDM is not a candidate for recoating....in fact EPDM's are not candidates for recoating!

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close