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arubatan 02-22-2007 12:02 PM

EPDM vs Modified Bitumen for flat roof
Please help! So far I've gotten 2 estimates for my low slope/flat roof. $2900 for EPDM, and $1600 for modified bitumen. I am in the Northeast. Which one is preferred, and why?

RooferJim 02-22-2007 12:30 PM

In the northeast its EPDM all the way, In the Boston area they consider modified to be just glorified roll roofing with a short term lifespan. There are some roofers in other parts of the country that love the stuff though. We will however install both but EPDM we have far more confidence and support.


arubatan 02-22-2007 12:32 PM

Thanks for your quick reply. Go with EPDM even though it's a 10 yr guarantee and modified bitumen is a 20 yr guarantee?

RooferJim 02-22-2007 10:26 PM

Really. what brands were they?


arubatan 02-23-2007 11:40 AM

Firestone, I believe.

RooferJim 02-23-2007 10:42 PM

Firestone does not warranty residential and they are epdm. Is your job commercial ?

arubatan 02-25-2007 05:26 PM

Residential. A small part of my home has this type of low slope roof. I'm waiting for a third estimate from a roofer who said he would use the modified bitumen also.

ncgrogan 03-05-2007 09:01 PM

Soprema SBS is what i would go with. Base Ply and a Cap

AaronB 03-05-2007 09:22 PM

I have tried and tried to see how EPDM is better, but do not see it.

I would go with APP mod bit.

roofwiz74 03-06-2007 08:05 AM

I'm with the hot mod also.A little more explaining or a pic would be nice.sometimes one product is much better suited for a certain application.

Talos4 03-15-2007 09:46 PM

Performance Roofing Systems Derbigum GP. Nothing else.

10 year MATERIAL warranty only on residential.

EPDM in the north? Have you ever seen an EPDM shatter in the cold?

I have, not pretty.

Just my $.02 worth

roofwiz74 03-16-2007 07:20 AM

can't say that I've seen a epdm roof shatter.would like too though.

Talos4 03-21-2007 10:00 PM

I'll have to dig up the photos I have somewhere and post them.

AaronB 03-21-2007 10:06 PM

Talos, we do not see enough of you are things?

RooferJim 03-22-2007 05:39 PM

I doubt it was EPDM that cracked, it was most likley Trocal. that was an early single ply that was notorious for cracking.


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