Good job but I'm amazed that there's not a product that will nest into the metal building panel ridges with a tight fit and give you a flat surface. The only thing that comes close is the Haslet Products filler frames but they don't have any kind of round cut out. You might contact them to see if they will fabricate a solution for you.
I am thinking of installing metal roofing on my shingled house, and I have power vent similar to this one. The one thing that's holding me back, is that I haven't found a satisfactory method of properly flashing the power vent with the metal roofing. Shingles are no problem with something like this. A Google search led me to this video. However, I am extremely dubious about how this video shows it to be done. All that caulking might seal for a year or two, but sooner or later......
You just created a major roof leak. Metal must be "two pieced"; one under to the top of hole, instal vent, then metal over and around down to or close to the bottom of the vent flange. No caulk is needed when installed properly. Caulk is not a sufficient method of flashing. Those "slits" that you made to slide the vent under and through have nothing under them and have exposed the underlayment and decking. You should not be doing this to people's homes. They are trusting you to do it right. Someone like me will be fixing this in the NEAR future.
You are so right. Just had these ex pensive fans installed wrong. Roofer brushed me off when I told him, (I'm female). I know it will leak not long from now. You got to really watch these roofers, they will screw you over.
The panels are installed wrong!! You just put a screw right by a rib into a little flat part,, that flat part goes down in the roof so it can have a foundation then the other panel goes on top !! Total AMATEURS!! Not too mention you need to pieces of metal on the vent
All of the people saying this is incorrect are right. Common sense will tell you that it will have zero leaks for the longevity of the caulking, but caulking always fails, it just takes time. So, homeowner Bob is happy, Contractor Bob is gone, and a year or two from now when he starts to have leaks there he won't even know, because the water will be dripping down the panel onto his sheathing causing rot that eventually leads to screw failure and in a high wind situation he will suddenly lose a couple of panels, along with the turbine. An improperly flashed perforation in your roof is the number reason for leaks. If someone is using caulking as a PRIMARY means to prevent water infiltration, then it is wrong. Caulking's primary purpose on a roof is to prevent wind driven water from being pushed UNDER proper flashing.
man, he flattened the holy hell out of those washers. The idiots that installed my skylights didn't even bother with slits. they just put all the flashing under the metal roofing and used duct seal and some kind of hard rubber to seal it. It's leaking of course and i'm trying to decide if i really need a freaking skylight! i pulled all that crap out and temporarily sealed it with APOC super flashing cement until i can decide what to do and get some professional opinions. The moral of this story is don't cut a hole in a perfectly good metal roof and don't think those washers on the screws are going to last 50 years! I'm slowly replacing all my screws with new ones now.
Next time don’t over lap your metal the wrong way. The flat flange goes underneath.!!! First sign of bad installation. Overdriven screws will leak as well, the washer is overstretched and will crack.
