Flat roof question

Anyone ever heard of a fully adheard ISO/TPO roof? Non ballasted 8 story 3500 square. Adheared ISO???? Never done it and never heard of it.>>>

Mine are cutoff after a couple of sentences, and I'm really trying to do my homework on TPO ahh!

Old School Said: Hey Steve, whats with the site now. Do we only get 2 lines and then get cut off? A lot of unfinished posts here!

Maybe he's cutting out all the blather.

i would say olybond or watertight both are rising foam iso adhesives. supposedly you can use on metal deck, but ive never done on metal deck. just on precast concrete. either a self adhering tpo, or glue down tpo would work, for qualities sake i'd go with glue has more of a proven track record, if that can be said about tpo.

http://technicaldatabase.fsbp.com/productData/foamadhesivesforinsulation/

Curved shape cant strip and a special patented knife with eight blades spaced 1/2 inch apart and fanned out in a matching curve.>>>

Mr. Funny Guy LOL>>>

Hot gets brittle when cold. With a properly sharpened instrument I can split a fully-adhered cap sheet right down to the finish ply sheets clean as a whistle. When it's cold. That's usually the temperature range when it's also windy and wet. Once y>>>

builderr wrote: [quote]fully adhered polyiso to steel deck?.......with what? David

Olybond. Millenium. Insta-stik. HOT. All would work. I think most mfr's have discontinued any approval of hot mopped insulation to metal deck... ??? bu>>>

in regards to the rigid insulation system, despite method/ manufacturer of actual roofing system..... I would assume that the building envelope engineers would be the ones specifying this detail.

Specifically, new construction details vs re-roof specific>>>

Yes Jeff, you're hearing me right. Fully adhered happens all the time. Here's a link to Carlisle's TPO page. First words are ..."mechanically fastened and fully adhered...."

As for the heat deterioration on membranes, after watching all of the sy>>>

Heat sink is also known as thermal bridging. Boards and insulations have a very low thermal transfer rate. (hence why they are insulations, duh). Conversely metals have a very high thermal transfer rate (conductivity). Any time you mechanically fasten you>>>

I've never seen the heat sink your talking about on TPO or PVC, only on EPDM. That doesnt mean it dont happen, just mean I never seen it. But your right, heat will speed up the aging of the material. Most TPO products are tested at some outrageous temp f>>>

Ever noticed the first place to thaw on a frosty roof is directly over the fasteners?

That's because the heat transfers through the fastener faster than it transfers through the insulation.

First place to prematurely age on most membrane roofs is direc>>>

It's 100% adhered. TPO/ISO. No ballast! And this is ok? I primarily use Firestone so that is most of my TPO knowledge but please tell me if this would be acceptable by any manufacturers specs.

Mike your knowledge on flat far supercedes mine so I wont ar>>>

Mike H wrote: [quote]Huh???

... and usually done to eliminate the heat sink created by fasteners.

...

can you expound on that? Sounds interesting. :)>>>