Ridgevent On A Standing Seam Roof.

 
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Old 09-01-2017, 08:10 PM   #1
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Ridgevent On A Standing Seam Roof.


My house originally had shingles with a ridge vent system and perforated soffits. I had a standing seam roof installed with peel and seal ice/water shield under layment. They totally encapsulated the roof with the peel and seal. They installed the ridge caps and did not cut out the peel and seal where the ridge vent used to be. Now the roof is totally sealed but my soffits are still perforated.

Is a ridgevent required for a metal roof?

I live in Florida panhandle where humidity can be 100% for long periods of time.
Would humidity be trapped in my attic?
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Old 09-01-2017, 08:21 PM   #2
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Re: Ridgevent On A Standing Seam Roof.


What kind of i&w?

Easy enough to cut it open from inside the attic.

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Old 09-01-2017, 08:34 PM   #3
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Re: Ridgevent On A Standing Seam Roof.


Its gaf.

I was thinking the same thing about cutting it out. The installer said that they always leave it closed.

I can't get a definitive answer as to whether a ridge vent is required or not. They inspectors don't know, the metal distributor says maybe. According to HUD code all hous require an attic venting system.

The z bar closure / ridge cap is somewhat sealed on top as well.

If the roof being sealed is a humidity or heat issue I will have them put a ridge vent system in place.
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Old 09-01-2017, 08:44 PM   #4
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Re: Ridgevent On A Standing Seam Roof.


Quote:
Originally Posted by Trintcole View Post
Its gaf.

I was thinking the same thing about cutting it out. The installer said that they always leave it closed.

I can't get a definitive answer as to whether a ridge vent is required or not. They inspectors don't know, the metal distributor says maybe. According to HUD code all hous require an attic venting system.

The z bar closure / ridge cap is somewhat sealed on top as well.

If the roof being sealed is a humidity or heat issue I will have them put a ridge vent system in place.
It will at the very least make your house cooler.

My major concern is that the granulated iceguard they used is going to abrade the backside due to expansion and contraction of your panels and cause them to rust out from the backside due to condensation on raw steel.

You are definitely trapping moisture in and that is never good
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Old 09-01-2017, 08:49 PM   #5
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Re: Ridgevent On A Standing Seam Roof.


The under layment is for metal. It's only sticky on the side that goes on the decking.

Thanks for your replies.
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Old 09-01-2017, 08:52 PM   #6
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Re: Ridgevent On A Standing Seam Roof.


do you have soffit venting?
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Old 09-01-2017, 08:58 PM   #7
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Re: Ridgevent On A Standing Seam Roof.


How steep is your roof?

Also, yes, I would say you need the venting at the ridge no matter the pitch.

Andy.

P.S., I can not see the logic in the expense of the entire roof being covered in the peel and stick.
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Old 09-01-2017, 09:00 PM   #8
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Re: Ridgevent On A Standing Seam Roof.


Quote:
Originally Posted by Trintcole View Post
The under layment is for metal. It's only sticky on the side that goes on the decking.

Thanks for your replies.
All I&W is only sticky on the udlnderside.

All GAF i&w I have ever worked with has a granular surface which scratches the back of your roof panels
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Old 09-01-2017, 09:01 PM   #9
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Re: Ridgevent On A Standing Seam Roof.


Quote:
Originally Posted by ScipioAfricanus View Post
How steep is your roof?

Also, yes, I would say you need the venting at the ridge no matter the pitch.

Andy.

P.S., I can not see the logic in the expense of the entire roof being covered in the peel and stick.
I believe it is required in Florida
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Old 09-01-2017, 09:22 PM   #10
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Re: Ridgevent On A Standing Seam Roof.


The gaf product used is specifically for metal. Its smooth on the outside.

I think my pitch is 3x12. Its a hip roof.

My soffits are vented. The are the vinyl perforated type. Thats why I could see humidity rising into them, but having no way out.

Peel and seal on the whole roof is common in Florida.
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Old 09-01-2017, 09:33 PM   #11
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Re: Ridgevent On A Standing Seam Roof.


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