Steel Roof SIPs

[Pettrix]

I am looking to use steel roof SIPs for my future home build. They are basically 24 gauge steel panels with 12" of EPS foam sandwiched between them. They offer a R-48 value and can span and carry significant loads because they are viewed as being like an "I-beam".

Has anyone here used them before? I know that wood OSB roof SIPs are quite common but I prefer to use steel on the roof due to added strength and fire protection. It also allows me to have a roof area that is only 12" thick and I DON't have to have soffit or ridge vents. I don't want to do wood trusses and an attic. The steel SIPs are commonly found on refrigeration buildings but people have built homes out of them.

[calvert]

Interior steel face panel? Does that extend into an exterior soffit? What climate are you in and have you considered conductivity through steel from interior to exterior at the transition point of ceiling (at exterior walls) to the soffit?

[Pettrix]

Interior steel face panel? Does that extend into an exterior soffit? What climate are you in and have you considered conductivity through steel from interior to exterior at the transition point of ceiling (at exterior walls) to the soffit?

Yes, both sides (interior & exterior) are steel faced with 12" of EPS sandwiched between. It is identical to a wood SIP but instead of wood on both sides, it is steel.

Yes, it extends into an exterior soffit, which is NOT vented and creates a 24" roof overhang.

The home will be in central Arizona (5,000 feet elevation). A mostly moderate climate. As far as conductivity or thermal bridging, I did question this issue and the manufacturer stated that on the underside of the SIP where it comes extends to the outside soffit and then to the interior underside should be minor. I haven't seen any studies to see how much thermal bridging there will be.

[Steel SIP Man]

I am looking to use steel roof SIPs for my future home build. They are basically 24 gauge steel panels with 12" of EPS foam sandwiched between them. They offer a R-48 value and can span and carry significant loads because they are viewed as being like an "I-beam".

Has anyone here used them before? I know that wood OSB roof SIPs are quite common but I prefer to use steel on the roof due to added strength and fire protection. It also allows me to have a roof area that is only 12" thick and I DON't have to have soffit or ridge vents. I don't want to do wood trusses and an attic. The steel SIPs are commonly found on refrigeration buildings but people have built homes out of them.

Pettrix, we build with steel SIPs all the tome it is our core business, feel free to call me at 1-877-321-7477 to pick my brain or visit www.southernsips.com or www.myspace.com/steelsips/photos. Typically the skin is 26 ga. not 24

[Steel SIP Man]

Interior steel face panel? Does that extend into an exterior soffit? What climate are you in and have you considered conductivity through steel from interior to exterior at the transition point of ceiling (at exterior walls) to the soffit?

Calvert;

Steel SIPs are used in all climates including Alaska, themal breaks are used on OH 's , steel sips used in cold storage have methods to overcome thermal transfers, something OSB and Fiber Cement SIP mfgs have not yet figured out