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| The Scuppers This is a new forum for the not necessarily fishing related topics... |
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03-21-2023, 07:30 PM
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#1
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Registered User
Join Date: Sep 2003
Location: Libtardia
Posts: 21,718
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Roofing question
I’m about to build a post and beam barn. I’m going to have a wood stove in there at some point. With that said, I’m going to have a metal roof. Do I need to throw a wood subroof under the metal ? I was originally planning on doing horizontal strips on the rafters and just screw the metal roof to that.
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03-21-2023, 08:08 PM
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#2
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Canceled
Join Date: Jun 2003
Location: vt
Posts: 13,454
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You can have condensation issues with a metal roof.
The issues occur when there’s high humidity and enough radiational cooling occurs to make the moisture condense out of the air.
Won’t happen every day and If you have a ceiling you’ll never notice it.
I’ve not seen structural issues from it.
There’s some preformed metal with a anti condensation coating available, have not used it.
ABC Supply sells one product.
Should be less expensive than going from purlins to sheathing.
Posted from my iPhone/Mobile device
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03-21-2023, 08:09 PM
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#3
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Soggy Bottom Boy
Join Date: Jan 2004
Location: Billerica, Ma.
Posts: 7,260
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Plywood would be best but I'm sure you could use strapping at 16" on center. I would go to the product page of the type of roofing material you're going to use for instructions on installations
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Surfcasting Full Throttle
Don't judge me Monkey 
Recreational Surfcaster 99.9% C&R
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03-21-2023, 08:10 PM
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#4
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Registered User
Join Date: Sep 2003
Location: Libtardia
Posts: 21,718
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Thanks Pete. Condensation is is what i was concerned about. I will look into that product.  |
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04-03-2023, 12:08 PM
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#5
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Registered User
Join Date: Feb 2009
Location: Attleboro, Ma
Posts: 212
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I would contact supplier website to ask about condensation
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04-04-2023, 09:19 AM
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#6
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Registered User
Join Date: Sep 2003
Location: Libtardia
Posts: 21,718
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Quote:
Originally Posted by clambo
I would contact supplier website to ask about condensation
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I did. Condensation is an issue plus all the heat would just go through the metal. So a subroof it is. I just put up the first wall yesterday
Posted from my iPhone/Mobile device |
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04-06-2023, 09:43 AM
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#7
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Very Grumpy bay man
Join Date: Nov 2003
Location: Rhode Island
Posts: 10,890
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Eben, don't think you would need 3/4 exterior. Probably get away with something less expensive.
1/2" PT is around $40/sheet.
BTW, the PT now sucks. I just rebuild a 10 x 12 deck and had 5/4 PT decking that was half rotted and only 10 years old.
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No boat, back in the suds.  
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04-06-2023, 02:04 PM
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#8
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Seldom Seen
Join Date: May 2001
Posts: 10,553
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I know it is a barn, but at least price the Zip system 5/8 roof sheathing. brick colored, not the green 1/2". I have used it. Like it. Put some up last fall an covered it last week. Not visible change after out all winter.
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“Americans have the right and advantage of being armed, unlike the people of other countries, whose leaders are afraid to trust them with arms.” – James Madison.
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04-06-2023, 05:18 PM
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#9
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Registered User
Join Date: Feb 2003
Location: Kingston, Ma
Posts: 2,294
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Quote:
Originally Posted by nightfighter
I know it is a barn, but at least price the Zip system 5/8 roof sheathing. brick colored, not the green 1/2". I have used it. Like it. Put some up last fall an covered it last week. Not visible change after out all winter.
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We use zip system frequently. It is fantastic. Roll the tape.
Not to beat a dead horse but the zip flashing tape is the most useful invention ever
Posted from my iPhone/Mobile device |
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04-06-2023, 06:44 PM
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#10
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Registered User
Join Date: Sep 2003
Location: Libtardia
Posts: 21,718
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I decided that I am just going to lay down some 2” battens across the rafters and just screw the metal roof to those battens. The decision is because I don’t think I will put a wood stove in there.
Posted from my iPhone/Mobile device
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04-06-2023, 07:00 PM
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#11
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User
Join Date: Jun 2012
Location: Cape Cod
Posts: 5,536
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Quote:
Originally Posted by Nebe
I decided that I am just going to lay down some 2” battens across the rafters and just screw the metal roof to those battens. The decision is because I don’t think I will put a wood stove in there.
Posted from my iPhone/Mobile device
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Yes… it’s a barn, noisy when it rains, the wrens can get in every spring at the eves, perfect place to rest and have a brew,,,,, life is good…. :-) |
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