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  1. Just a few comments. You should never glue tpo unless its 40 deg and rising. And you shouldnt glue anything to fesco it will never stay stuck. Fesco is for hot asphalt only. Insulation is to be fastend with 3" plates and tpo is to be fastend with 2" barbed plates. And he was holding that leister welder backwards in the seam as he welded. I hope it holds up for you.
  2. A tpo boot would not weld to a pvc membrane. They are completely incompatible.
  3. Les I may have sounded off but im not. I understand your point and also that a lot of roofers don't do things properly. Maybe they don't even know how to. Ridge vent is not a cure all for ventilation and in some instances isn't even an option.
  4. Well I live and work on these corn field palaces and have installed hundreds of ridge vents including my own. Properly I might add. With no call backs or problems. What exactly do you find wrong with others installations? Are they not cutting the wood back or is there no soffit vents? Oh and by the way my vents are all solar and wind powered. Go Green.
  5. Also when you buy the ridge vent don't get the type that has the mesh bug guard in it. It looks like a furnace filter material and works just like one to. It will clog within 6 months and you will have no venting at all. The bigger the openings the better.
  6. It appears to have been capped for years.
  7. No, polyurethanes, silicone ect wont hurt epdm. Any type of roof cement or oil based product would though. The caulk is used after the adhesive for a temporary seal until the glue cures and for T bar, Boot tops ect. Regular (cured) epdm will not form through angle changes or around pipes and such things. Thats what the uncured form flashing is for. Its also used for T joints, vertical patches, curb corners ect. The material on the stack and gas line in the pics is form flashing as is the strip in on the boot. They used to use neoprene but it ages and splits.
  8. It is Epdm and its seamed with tapes or adhesives. Those are the plates and screws that secure the insulation to the deck and possibly the epdm is also adheared to them. It appears that there is a epdm square at each plate. The material used for the flashings is form flashing or uncured epdm. Sometimes it does have a textured surface and it looks like the right stuff. The caulk looks like the wrong stuff but it wont make or break a good roof.
  9. Check these out. http://www.decra.com/
  10. I believe derbigum has been bought and sold a few times over the years and Owens corning was or is one of these owners and that would explain all the glass in the sheet. Kurt, I'm Technical rep for Firestone.
  11. Theres a old modified system called derbigum that looks like that when it gets old and doesnt get coated. Any idea how old it is?
  12. Those type of vents are for a sloped roof they have a good chance of leaking even if they were properly flashed in. On a flat roof a curb would be installed or a stack and the proper vent would be placed on that. There is also a one way vent made just for flat roofs that's about 8" high with a little mushroom cap. Flat roofs normally are not vented the way a residential roof would be unless venting out moisture from an old roof left in place. All that being said 5" epdm form flashing and primer around the flange would probably seal it up. That is until snow builds up over it or the metal joints inside the can leak.
  13. Thats incorrect. Most manufactures have coated metal for all welded membranes. Ive seen thousands upon thousands of feet of tpo metal.
  14. There is a aluminum coating that's fibered and will fill the cracks better. If the cracks are into the plys or membrane then its time to reroof if its just an asphalt flood coat that's cracking its not a huge deal.
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