newhome
Registered Users
Posts:16
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| 07/16/2008 2:56 PM |
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How is thermal heat transfer handled when Metal SIPS are used for roofing?
I would think that you would have a direct line to the outside in this application.
I am looking at the inner skin going directly over the wall to the outside. |
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cmkavala
Registered Users
Posts:724
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| 07/16/2008 3:06 PM |
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Posted By newhome on 07/16/2008 2:56 PM
How is thermal heat transfer handled when Metal SIPS are used for roofing?
I would think that you would have a direct line to the outside in this application.
I am looking at the inner skin going directly over the wall to the outside.
In northern climates it is more of a concern and in those cases thermally broken channels are used, and a 1/4" saw cut on underside directly over the thermal top cap creates the thermal break.
But again not a concern in the south, the thermal break is only needed in colder climates
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Chris Kavala
chris@southernsips.com
1-877-321-SIPS |
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rnortman
Registered Users
Posts:70
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| 07/16/2008 3:14 PM |
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Can somebody post a link to drawing of the details you guys are talking about? I think I get what the original poster is complaining about, but I'm not sure I'm picturing the solution properly. A picture is worth a thousand words...
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newhome
Registered Users
Posts:16
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| 07/16/2008 3:19 PM |
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| I would love a diagram as well. I see a problem of cutting into the roof panel? |
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cmkavala
Registered Users
Posts:724
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| 07/16/2008 3:29 PM |
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Posted By rnortman on 07/16/2008 3:14 PM
Can somebody post a link to drawing of the details you guys are talking about? I think I get what the original poster is complaining about, but I'm not sure I'm picturing the solution properly. A picture is worth a thousand words...
attached is a detail for top cap we did for someone in Russia
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Attachment: Thermal cap.PDF
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Chris Kavala
chris@southernsips.com
1-877-321-SIPS |
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Jelly
Registered Users
Posts:220
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| 08/03/2008 5:29 PM |
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| What about at the window and door openings? If the rough openings are lined with steel isn't there a thermal transfer possibility there? |
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cmkavala
Registered Users
Posts:724
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| 08/03/2008 5:35 PM |
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Posted By Jelly on 08/03/2008 5:29 PM
What about at the window and door openings? If the rough openings are lined with steel isn't there a thermal transfer possibility there? jelly;
if you run the steel straight thru, but in extreme cold climates the window / door recievers are either thermally broken or 2 piece with gap, same as done for base or top channels. exterior wall corners are mitered so there is no thermal transfer
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Chris Kavala
chris@southernsips.com
1-877-321-SIPS |
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rnortman
Registered Users
Posts:70
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| 08/03/2008 5:41 PM |
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cmkavala, are you talking about the window or door frame as provided by the window/door manufacturer, or about the framing put into the rough opening by the SIPs manufacturer? I had been assuming that even steel SIPs use 2x lumber for framing rough openings, but perhaps I was wrong.
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cmkavala
Registered Users
Posts:724
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| 08/03/2008 6:02 PM |
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Posted By rnortman on 08/03/2008 5:41 PM
cmkavala, are you talking about the window or door frame as provided by the window/door manufacturer, or about the framing put into the rough opening by the SIPs manufacturer? I had been assuming that even steel SIPs use 2x lumber for framing rough openings, but perhaps I was wrong.
wood in steel SIPs, bite your tongue!
the attachment shows the channel used for steel sip walls, and 18 ga. "U" channel, no grooving necessary, it just simply wraps the opening and is effective for openings up to 6ft. wide, larger - such as overhead door openings have another detail
The overhead door detail also serves as the top door buck, sides are done with 6" steel stud/track
The photo shows the window framing
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Attachment: File0241.PDF
Attachment: OH door.PDF
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Chris Kavala
chris@southernsips.com
1-877-321-SIPS |
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Jelly
Registered Users
Posts:220
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| 08/04/2008 9:56 AM |
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Posted By cmkavala on 08/03/2008 5:35 PM
exterior wall corners are mitered so there is no thermal transfer
I thought you were doing butt joints on the exterior corners?
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ReadyToRetire
Registered Users
Posts:180
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| 08/04/2008 4:43 PM |
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Chris,
That saw cut on the underside of the roof panels would create a very easy thermal break. But if storms are a concern, wouldn't that cut completely eliminate the SIP's strength against uplift on the overhangs? How do you protect the overhang?
Very respectfully,
Larry
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cmkavala
Registered Users
Posts:724
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| 08/04/2008 5:25 PM |
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Posted By Jelly on 08/04/2008 9:56 AM
I thought you were doing butt joints on the exterior corners?
butt joints in the south mitered in the extreme cold north, |
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Chris Kavala
chris@southernsips.com
1-877-321-SIPS |
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cmkavala
Registered Users
Posts:724
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| 08/04/2008 5:32 PM |
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Posted By ReadyToRetire on 08/04/2008 4:43 PM
Chris,
That saw cut on the underside of the roof panels would create a very easy thermal break. But if storms are a concern, wouldn't that cut completely eliminate the SIP's strength against uplift on the overhangs? How do you protect the overhang?
Very respectfully,
Larry
Larry;
Not completely, screws are on the outside wall perimeter and each screw has an 1-1/2" OD fender washer @ 8" oc ....... engineers say its OK. Can't imagine uplift that great.
Screws with washer will not pull thru steel skin, I can however drive a SIP screw thru an OSB panel as they do not use washers
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Chris Kavala
chris@southernsips.com
1-877-321-SIPS |
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Jelly
Registered Users
Posts:220
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| 08/04/2008 7:36 PM |
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| Larry, which saw cut are you referring to - is it in one of the details or the photograph? |
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ReadyToRetire
Registered Users
Posts:180
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| 08/05/2008 4:13 PM |
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Jelly,
Oops -- I was referring back to the image linked in Chris' 07/16/2008 2:29 PM posting, which is the 5th one in this thread. It shows a steel SIP roof panel with a lateral cut to create a simple thermal break.
http://www.greenbuildingtalk.com/desktopmodules/ntforums/viewer.aspx?portalid=0&moduleid=369&attachid=528
Sorry for the confusion.
Very respectfully,
Larry
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KwikBuild
Registered Users
Posts:8
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| 08/05/2008 6:06 PM |
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I tried to paste a picture of what our panels look like and how they prevent "Thermal transfer" but this system will not let me cut and paste to it.
Take a look at our web site link We do have details show our panel system. These panels can be used for walls, floors & roofs.
Kwik-Build Panels
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