Take a closer look at the detail where it says "foam wedge" .......... but since a foam wedge is only good in a perfect world , we use expandable foam at the peak

Speaking of OSB wood SIPs, this unfortunate homeowner is having shrinkage in his wood SIPs and it is pulling apart his T&G panels.





It may not have anything to do with his SIPs, it could be the T&G is shrinking
If the sips where shrinking it would have the opposite effect on the T&G

I put a standing seam finished roof on my steel SIP roof (used a peel-and-stick membrane between SIP panels and finished roof). I used matching bare silver galvalume fascia channels (brake-formed by the same supplier I got the standing seam roof from) to finish off the ends of the SIP panels, where eventually I will attach gutters...

Posted By Jelly on 27 Feb 2012 12:26 PM

I put a standing seam finished roof on my steel SIP roof (used a peel-and-stick membrane between SIP panels and finished roof). I used matching bare silver galvalume fascia channels (brake-formed by the same supplier I got the standing seam roof from) to finish off the ends of the SIP panels, where eventually I will attach gutters...

How thick of a SIP panel is that on the roof, 12"?

Don't the steel SIPS come finished at the ends?

What kind of walls are those (SIPS)?

Entire structure is steel SIP, walls and roof, and they are all 4 inch panels.

The sides (or skins) of steel SIP panels are finished, so the underside, which becomes the soffit, is already finished. The left and right edges have an interlock. The top and bottom do not. But the ends, no, SIP panels regardless of material do not have finished ends. SIPs are sometimes referred to as sandwich panels, so the skin is the bread of the sandwich, and that is the finished part. The foam is the meat in this equation.

Sorry if I'm going overboard in the description, but I hope it helps.

Posted By Jelly on 28 Feb 2012 12:32 PM
Entire structure is steel SIP, walls and roof, and they are all 4 inch panels.

The sides (or skins) of steel SIP panels are finished, so the underside, which becomes the soffit, is already finished. The left and right edges have an interlock. The top and bottom do not. But the ends, no, SIP panels regardless of material do not have finished ends. SIPs are sometimes referred to as sandwich panels, so the skin is the bread of the sandwich, and that is the finished part. The foam is the meat in this equation.

Sorry if I'm going overboard in the description, but I hope it helps.

I thought the steel SIPs were finished on the fascia area. I guess I was wrong.

What did you do on the interior roof area? Did you furr the ceiling or just leave it exposed steel SIP?

Posted By cmkavala on 09 Feb 2012 05:29 PM


GMC Sierra LED DRL Strips for Those beams were for aesthetics,
Since the Arizona sun would not likely hit the underside of a roof overhang much, there is not mutch to worry about? Steel skins come in either G-90 galvanized/painted or Galvalume /painted
Facia is 24 ga. steel very adequate to support gutters( there are no internal supports in the steel SIPs they are purely structural on their own)

The fascia was attached by the homeowner, they did not come from the factory with a steel fascia, correct?

How do they attach that fascia?

Can one get steel SIPs with the steel fascia already attached from the factory?

Well the panels fit together with various interlocks, depending on the brand, something like tongue and groove. And they normally span from the ridge beam to the top of the wall. So the ends couldn't be already finished. One panel gets set and then the next one slides in place.

When all the panels are placed then a thin gauge U-shaped channel is applied to the ends with screws. This is what constitutes the fascia. You can have it angled or let the ends remain flat and can be whatever color you want. It can be placed by the homeowner or by whoever does the rest of the panel work.

Posted By Lbear on 28 Feb 2012 03:23 PM


What did you do on the interior roof area? Did you furr the ceiling or just leave it exposed steel SIP?

Where I had a cathedral ceiling in the foyer I furred down the panels with 1 and 1/2 inch hat channel and placed sheetrock. In other spots the non-vented attic space is conditioned, but not finished at this time. So I left the panels exposed there. Another option is to screw the sheetrock directly to the panel.

Here is a pic of the same area under construction. The first steel SIP roof panel is being placed. I trimmed the ends to match the angle of the wall. You can see the exposed foam which will later be covered by a channel to create the fascia.

Posted By Jelly on 28 Feb 2012 06:22 PM

Where I had a cathedral ceiling in the foyer I furred down the panels with 1 and 1/2 inch hat channel and placed sheetrock. In other spots the non-vented attic space is conditioned, but not finished at this time. So I left the panels exposed there. Another option is to screw the sheetrock directly to the panel.

The reason I mentioned furring is that steel SIPs one-piece strength are a doubled-edged sword, they have very low sound absorption properties, so sound travels through them quite easily. An air space is an easy fix, especially for the roof. Adding a 1"-3" air break/gap will help deaden sound. 5/8" drywall will help also.

With a 4" EPS core, what is your ceiling R-Value at?

Are you doing the build yourself? Are you on the east coast?

 

Yes the areas where there is furring and sheetrock are definitely quieter than the unfinished attic for example. But even just the mass of sheetrock straight to the panels is beneficial against noise, of course not as much as with the dead air space. We are about 350 feet from a freeway, and when the windows are closed you can't tell it's there.

I'm in Louisiana, and I did the build myself. The cores are Polyurethane foam so they have a higher R value at lower thicknesses.

Posted By Lbear on 28 Feb 2012 03:29 PM

Posted By cmkavala on 09 Feb 2012 05:29 PM


Those beams were for aesthetics,
Since the Arizona sun would not likely hit the underside of a roof overhang much, there is not mutch to worry about? Steel skins come in either G-90 galvanized/painted or Galvalume /painted
Facia is 24 ga. steel very adequate to support gutters( there are no internal supports in the steel SIPs they are purely structural on their own)

The fascia was attached by the homeowner, they did not come from the factory with a steel fascia, correct?

How do they attach that fascia?

Can one get steel SIPs with the steel fascia already attached from the factory?

........... NO.........