A non-panel friendly design can escalate costs, increase waste, and in some cases, diminish the performance of the building or home. To reduce cost and waste, architects should design panel-size friendly SIP walls without excessive jogs, bump-outs, or non-90 degree angles. However, wall, roof, or floor panels, bigger than eight by eight feet, require a crane or forklift. Workers can manually move and handle small SIP panels. Vertical cuts in the OSB for electrical wiring don’t interfere with the SIP wall integrity however, horizontal cuts significantly reduce panel strength. A specific problem with installing electrical wiring through a SIP wall involves the cutting of the wall. When installing electrical wire through SIPs, builders must hire subcontractors familiar with SIP construction. Horizontal Cutting of the SIPs Diminishes Structural Performance ![]() When done correctly, the process provides quality control and minimizes waste however, any mistakes either in design or cutting of the SIPs can cost a builder both time and money. To prevent costly mistakes during SIP installation, architects and builders must plan for the electric wiring and plumbing, the doors and windows, and other architectural features. SIP manufacturers use computer-controlled equipment to size and cut the SIPs according to the CAD drawings. Manufacturers, architects, and builders must ensure precise and accurate cutting of SIPs to prevent time-consuming and costly modifications during installation. ![]() Costly Modifications of SIPs During Installation Eleven Problems with Structural Insulated Panels 1. However, the numerous problems with SIP construction can diminish the quality of the wall system and ultimately cost both the contractor and building owner time and money. SIP construction produces straight walls with higher levels of insulation, airtightness, and strength compared to wood-frame construction. Other sheathing materials include plywood, gypsum sheathing, sheet metal, fiber-cement siding, magnesium-oxide board, fiberglass mat, and composite structural siding panels. Producers of SIPs commonly use 7⁄16-inch thick oriented strand boards (OSB) for the sheathing boards.
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