C3Prefab: v3.0
A Third Design in the C3Prefab Suite of Homes C3Prefab v3.0 is a next generation design in the suite of high performance homes by Square Root Architecture + Design. This home utilizes a prefabricated SIP (Structural Insulated Panel) wall system for the entire exterior including the roof, creating a highly-insulated and thermally-broken building envelope. This form of prefab, often generically referred to as a ‘flat-pack’ system is erected in tandem with site-built framing to produce a hybrid type of construction that harnesses the finer qualities of both types of construction. Exterior framing times are reduced due to the panelized exterior, thus the home can be ‘weather tight’ in a shorter period of time, speeding up the construction schedule and reducing the potential for weather related delays. C3Prefab v3.0 was originally designed for a suburban Chicago lot, however is easily adapted for a smaller urban lot. Even on the larger suburban lot, one of the original design goals of this project was to minimize site disturbance and lot coverage as a means to control excavation costs and preserve the large open yard for a growing family. With a footprint that is slightly larger than other C3Prefab homes, we were able to design the majority of the building program into floors above grade, with the exception of a small basement area reserved for mechanicals and storage. This simple design move aids in further reducing project costs and allows for the option of utilizing in-floor radiant heating within the concrete slab on the first floor living space. Varied ceiling height, and a large open first floor plan provide multiple opportunities for flexible living space including a home office area. Large windows throughout create strong connections to the exterior yard and a covered exterior dining area on the ground level emphasis the importance of the interior/exterior relationship of this design. An inverted, or ‘butterfly’ roof design aids in shielding the solar panels from view, while minimizing the storm water drainage system and giving the home a uniquely modern look. Exterior materials include corrugated metal siding, painted cement board panels, and ipe wood siding. Interior finishes include polished concrete and bamboo flooring along with low-VOC paints, water based finishes, and a custom IKEA kitchen. Along with contributions to site water management, water usage reduction, energy conservation, and indoor air quality this project achieves a high level of sustainability within a modest budget. High-efficiency mechanical systems are complemented by renewable energy provided by a solar thermal panel system. This project will receive EnergyStar and Indoor AirPlus certifications. This home is to be third-party tested for a HERS (Home Energy Rating System) score of 32, meaning that its energy efficiency is 68% better than a comparable standard built home. All C3Prefab homes are available for customization to fit the lifestyle and budget of a potential homeowner. © Square Root Architecture + Design, Ltd.