TP Guy;
Steel shadowline, with 26 gage galvalume white painted skins, eps
"Perform-Guard"foam core:
4" walls - R= 17 .......................... $ 18.48 per lineal foot
6" roof - R = 25.5 ...................... $ 19.68 per lineal foot
We round up to the next nearest 6" increment, so if you want a 20' - 3" panel it is priced at the 20' - 6" price increment with
NO UPCHARGE for cuttingFriction fit interlock requires no splines, no mastic, no fasteners, no scoop outs on cuts.
Things to factor in analysis:
cost of soffit, cost of crane, cost of vapor barrier (items needed on OSB, but not steel)
Although any SIP construction will save 50 – 60% in energy costs, are 3 times stronger than frame, and are more environmentally friendly. Steel is a better choice for the following reasons
Advantages of Steel SIPs vs.OSB
v Steel will not warp, swell, twist, rot
v Rain during construction do not affect materials in any way
v No cranes needed for installation a steel SIPs are lighter than OSB
v The underside of the roof panel automatically forms an attractive finished soffit overhang or exterior porch ceiling.
v Joints are a T&G friction fit they do not require splines, mastic or fasteners greatly speeding installation time
v Steel is more stable during manufacturing and panels are held to 1/16” tolerance
v OSB is limited to 24ft. in length …Steel SIPs are available up to 53ft. in length, eliminating butt joints
v Steel panels are manufactured on a continuous line making them available in square pre-cut lengths in ¼ ” increments, but only charged to the nearest ½ ft., OSB often rounds up to the nearest 2 ft. increment – making you pay for waste that gets thrown away
v Higher ” R – Value” denser foam provides a 4.25 R- value per inch of foam
v No Termites … Impervious to termites and carpenter ants , foam core is borate treated
v No foam grooving is required for window and door openings, after cutouts are made, openings are simply “picture framed” with 18.ga. steel channels
v The steel skin is the “vapor barrier” on walls no additional covering is required before siding is applied
v Eave overhangs can be 4 feet with no additional support
v Sound Control – utilizing a 1-1/2” steel furring strip creates a dead air space for improved STC ratings.
v Wiring – utilizing that same air space, wiring is much easier than fishing wire thru OSB and any future retrofit wiring is easier.
v Will not support mold growth – painted galvalume steel skins are UDSA approved
v Indoor air quality is better due to the tighter and cleaner construction material of the interior
v Any steel building is safer from lightning strikes
v “Monocoque construction” All connections and attachments are with screws having greater pullout strength than nailing
v For economy or insulated utility buildings, steel SIPs have been left exposed as the finished siding and roofing.
v Zurich Ins. In partnership with the Steel Framing Alliance offer reduced builders risk insurance premiums
v In Florida and other hurricane prone regions Steel SIPs are 30% less to insure than block/truss and 53% less to insure than wood frame construction
www.southernsips.com