WHY would you go through all the hassles and pain in the a$$ to install Epdm against MFG requirements for BOTH membrane and adhesive??
I understand that you may be comfortable installing Epdm in general. I could also see it from a perspective of a 19th century furniture maker who would place a bed-bug inside a new mattress he just finished making… I hope you get the analogy, but I am sure that is not the case here.
It is probably the unwillingness to re-train the crew, to buy all the necessary and VERY expensive equipment, just being use to doing things the old way. I understand and that is great if it works for you.
But it does not always work! Yea, you can warm up the adhesive and caulk and seam tape… but why do it all when there is an easier way that is proven to work and does not void the warranty???
To Borna: I don’t sell IB here. If you had not noticed this site is useless in terms of online marketing and sales. The threads here get about 2-5 answers per day, if that. This means that the traffic here is way low. It is also pretty much a hardcore group of members that usually talk between themselves with rare occasional visitor from outside of roofing biz (the home/roof owner).
I also have NO direct benefit from increase in sales at IB, as I’m merely a contractor.
Now about the plasticizers leaching out and membrane cracking becoming brittle - what you are talking about is pure demagogy! Yes there was a PVC mfg that made non-reinforced membrane which would crack in cold temps - so what? that was 15-20 years ago, and that was not IB. Not all PVC is the same. Every mfg has its own formulation, therefore each PVC brand is fundamentally different from one another. The main similarity is the use of vinyl and chlorine in PVC.
BTW, IB is technically a CPA membrane (co-polimer alloy) which is compatible with PVC and it is my guess they use the name PVC as it is widely recognized, unlike CPA. I am not a chemist, so dont hold me to all the formulas and interactions of elements in the membrane.
But, Borna, please provide at least one evidence of a failing IB roof. If you can’t than than you should state that failing IB CPA/PVC roof that you see all aver the place, left and right and all too often is the product of your rich imagination, and is not really happening.
Oh, and by the way, I still remember how you offered someone here to put an acrylic (or urethane) white coating on a brand new Epdm roof, to make it a Cool Roof, instead of using a roofing membrane that was originally designed to be a cool roof… so I can’t see how you can be adequate and objective when it come to advising a roof membrane.
I of course am not objective either - I prefer IB and that is my choice and I clearly state that. But I try to be rational, I prefer NOT to violate the manufacturer’s installation specs, and not to over-complicate thing when there is a simple solution…