Ice and water shield, roof underlayment help!

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Old 01-13-11, 08:41 AM
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Ice and water shield, roof underlayment help!

Hey guys I need your opinions. There must be a dozen different companies saying their products are the best, who do you believe? What products have you used and like or didn't like? Do you cap nail your roof underlayment, if instructed to, or just staple? I'll be putting up a 4000 sq ft house with 3/12 roof trusses and metal ribbed panels over OSB sheathing in north central PA. It won't be a hot roof.
Thanks for your help!
 
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Old 01-14-11, 08:51 PM
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I would definately use an underlayment. I have seen people staple the product with staples but I use button caps.I prfer GAF or O.C.
 
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Old 01-14-11, 09:33 PM
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I'm kind of partial to ice and water shield in all valleys as well as the bottom edge anywhere the pitch gets to flat.....even on a metal roof. Since you have to nail down the strips for the panels, I would just use a staple hammer. What color are the panels?
 
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Old 01-15-11, 04:29 AM
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Thanks roof master. I think I read that Interwrap has a notification out that you can use a gal roof nail in place of the cap nails for their product. I am just wondering if the cap nail will telegraph thru the metal in time. So far I like the GAF as you do.

Bish, the color will be a med blue and laid right over the sheathing underlayment. As per code I have to install ice shield 24" past int. wall lines so the valleys will have plenty of material too! I always pre drill the panels so the spacing is uniform and screws are easer to install.
 
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Old 01-17-11, 04:55 PM
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I could understand concerns if you were using a simplex nail(metal headed) But a grip rite is plastic with the nail seated deep in the head and would be less abrasive with the movement of the structure.
 
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Old 02-09-11, 09:13 PM
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Make sure you use high-temperature ice and water shield I am sure this is called out in your manufacturers specifications and your local building codes. The metal roofing manufacturers specifications will tell you all you need to know about the underlayment they require for their product.
 
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Old 02-10-11, 09:42 AM
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The manf. of the roof steel says all you need is 15# felt!!
 
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Old 02-10-11, 06:44 PM
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I would like to know the name of the manufacturer if that would be okay. I would study the manufacturer specifications to see what is called out for underlayment. It would be interesting to know if all they call out is 15 pound felt underlayment what other specifications they are going by. All of the manufacturers that we install metal roofing for are very exact with the specifications and what they want for underlayment.
 
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Old 02-11-11, 03:45 AM
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Hi Nordberg,
The manf is MS Metal out of Orwigsburg, PA I called them at 800 554 2577 and asked what underlayment the recommend and said just 15# felt. I also called another place just for fun, ABC metal, in NY, and they said the same thing!
I was going to use a synthetic with nail caps but worry about the caps telegraphing thru the metal panels and these people don't seemed to concerned since they say use just felt!

Thanks
 
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