Underlayment Question

I have put down PSU30 on my entire roof, I have read in some places that there are certain areas of your roof you want to put down 2 layers of underlayment, such as valleys, or the ridge. Is that required? Best practice? Thanks.		Brad C 10/19/2017	Share Or copy this URL: https://www.metalroofing.com/spirit/comment/22567/find/
Not really required with a properly done metal roof whereas it might have some benefit with an asphalt based roof. Ice/water in the valleys is always a good idea.		Eric Novotny An informed customer is the Best Customer! 10/20/2017	Share Or copy this URL: https://www.metalroofing.com/spirit/comment/22568/find/

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