Give it all the air flow you can. It still sweats. No stopping it. If using metal roofing, strip all the old shingles off. Install ice and water shield, or 60# felt over roof decking. Then install the roof panels (preferably standing seam on a home). No NEED for purlins. If you thought you wanted air flow (not a BAD idea, but not necessary), First install 1/2" - 3/4" strips vertically. Then install horizontal purlins. This way any condensate can run under the purlins, and out the bottom. If using standing seam metal roof panels, the bottom edge gets bent around the drip edge. You'll have about one inch sticking past the fascia board when done. One inch is what you want. If using barn metal roof panels, you don't install ANY drip edge. Simply let the metal roof panel over shoot the fascia board 1"- 1-1/4". Many people install drip edge with barn metal roof panels( BIG MISTAKE!). I recommend covering the fascia board with flat metal. And if you want, bend another piece of metal to slide up under the barn roof panel 4 or more inches, and counter flash the fascia metal, keeping it tight to the fascia metal. Again; No Drip Edge with Barn Metal Roof Panels. Do as I said, and you'll be all set up for gutters. Now you'll need snow retention of some sort. If not, good chance you'll get the gutters ripped off from ice/snow. Other problems are: water rocketing down the roof, jumping the gutters(Especially in the valleys). On barn metal, screws back out. Rubber washers go bad, etc.. The length of roof matters. The pitch of roof matters. The rays of the sun matter. The wind direction matters. The Geographic climate matters, etc.. The flatter the roof pitch, the less the warrantee. Warrantee's are void within 3/4" of any cut/perforation. On barn metal, every screw is a perforation. An acidic type atmosphere will eat holes in a metal roof. EXAMPLE: fly ash from coal stove. Or salt water mist from ocean. Which in case; you might want to look into a different kind of metal roof material. I can go on and on with this metal roof topic. Metal roofs also have good points to them when properly installed. Still, I'd never install barn metal on my house. On a trailer, hunting camp, etc., Maybe? Every situation is different.
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Today's Featured Article - Identifying Tractor Noises - by Curtis Von Fange. Listening To Your Tractor : Part 3 - In this series we are continuing to learn the fine art of listening to our tractor in hopes of keeping it running longer. One particularly important facet is to hear and identify the particular noises that our
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