Sandra Scallan, Skinner, Patricia | 8/6/2007 1:25:35 AM
Standard Framing (2x4 studs 16” on center)
Most homes in Louisiana are wood framed with 2x4 studs. Typical practices include using extra non-load-bearing studs at corners to support wallboard, double top plates and uninsulated headers over windows and doors. Studs in this portion of LaHouse are laminated strand lumber (LSL), and overhead joists are engineered wood I-beams.
Structural Insulated Panel System (SIPS)
Structural insulated panels combine structural framing and insulation into a single product. Rigid foam insulation is sandwiched between two structural panels, or skins. The skins, which are glued to the foam, are most commonly oriented strand board (OSB) but can be steel, plywood or cementitious material. SIPs can be cut on site or ordered from the factory with precut window and door openings and channels through the foam core for wiring. With precut panels, installation time can be less than half that of stick framing with little construction waste. SIPS have high strength characteristics and are used for walls (4” thick) and roof (8” thick).
Advanced Framing/Optimum Value Engineered (2x6 studs 24” on center)
Advanced framing reduces material and labor costs and is more energy-efficient than standard framing. Floor, wall and roof framing are spaced and aligned at 24 inches on center, creating 2-foot modules. Advanced framing techniques eliminate lumber that is not necessary for load-bearing purposes. Examples of increased resource efficiency include the use of two-stud corner framing, single top plates because of the aligned stack framing and insulated headers sized for the load-bearing need.
Insulating Concrete Forms (ICF)
ICF walls are made by stacking hollow blocks of rigid foam (as forms) and filling them with concrete. Plastic strips, which hold the foam sides of the blocks at uniform separation, determine the thickness of concrete in the wall. Steel reinforcing bar (rebar) is placed in the cavity before the concrete is poured in. The foam forms and plastic connectors stay in place as permanent parts of the wall assembly, thus providing a continuous insulation, acoustic and moisture barrier, as well as a backing for drywall, stucco, siding or other cladding.
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