Installing standing seam roofing: "What kind of underlayment if any do i need under ..." - Guest User (7/1/2004) | Standing Seam roof | Archive

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What kind of underlayment if any do i need under the roofing to prevent from any condensation or related problems.	Guest User 7/1/2004	Share Or copy this URL: https://www.metalroofing.com/spirit/comment/3364/find/
I was told by a co-worker that i will need to insulate or put down an underlayment to keep the condisation from building up and dripping. The building i'am roofing is a cottage,so it won't be heated or cooled all the time. Is the condisation going to be a problem,if so what can i do. Thanks,Tom	Guest User 7/1/2004	Share Or copy this URL: https://www.metalroofing.com/spirit/comment/3365/find/
If the installation is over decking, then an underlayment should be used. Either 30-pound felt covered by a slip sheet or else use one of the new synthetic underlayments. For installations over purlins, I would suggest underlayment beneath the purlins. ALWAYS ALWAYS ALWAYS obtain and precisely follow manufacturer instructions. If the manufacturer does not have instructions, find another manufacturer.	Guest User 7/2/2004	Share Or copy this URL: https://www.metalroofing.com/spirit/comment/3366/find/
Not clear and need more details for my situation: Installing new metal roof and the existing roof has 2” X 6” rafters & ceiling joists trusses every 2’ on center, 1” X 6” tong and grove roof sheathing, roof felt, and 4 layers of asphalt shingles. Was built in 1942 by the US Government (Army). Willing to remove down to the 1 X 6” roof sheathing and build back to protect and control condensation. Please give me a good design to build back under a new 29 gauge metal roof. Do I need to include spacers between roof sheathing and metal for ventilation? Existing attic ventilation incorporates two open end gables facing East and West allowing cross flow. The top ridge is closed and so is the soffit closed. No up draft ventilation only have cross flow ventilation but seem sufficient.	Guest User 8/1/2004	Share Or copy this URL: https://www.metalroofing.com/spirit/comment/3367/find/
Due to the number of layers of asphalt, I would remove them. I would also try to use this as a time to add soffit and ridge ventilation and remove the gable vents. As we do many things to make buildings "tighter," they breathe less and are more prone to holding moisture. Because of the amount of work alreayd involved with this roof project, I would take the time to add the ventilation.	Guest User 8/3/2004	Share Or copy this URL: https://www.metalroofing.com/spirit/comment/3368/find/