H.E.A.R.T.H.

Solar Decathlon Team Competition

Spring ‘21

As climate change and housing inequality compound each other’s effects, there lies a pressing need for us to design a built environment that combats both of these issues to ensure a sustainable future. HEARTH exists precisely at this intersection as a Hybrid Equitable and Resilient Transitional Home.

Urban areas around the world are facing critical challenges as communities scramble to respond to the combination of rising property prices, the increasing tangibility of climate catastrophe, and the economic instability and health risks due to the Covid-19 pandemic. All of these further destabilize the livelihoods of marginalized individuals struggling in already volatile conditions, particularly the homeless and low income populations. The City of Santa Rosa in Sonoma County, California is an exemplary model of these ongoing phenomena. The city has been engaged in a recovery effort following two deadly wildfires in recent years, and the homelessness crisis in the Bay Area ranks among the worst in the United States by virtually every measure, yet despite the manifold efforts of local governments, companies, and nonprofits to address the issue, the number of homeless individuals continues to grow. In addition to policies that prevent housing instability in the first place, there is a pressing need to rethink how communities can be built to support these disadvantaged populations while considering economic and ecological constraints.

Perspective section through the community wing

Perspective section through the community wing

HEARTH’s design is a framework and model for implementing a hybrid long-term supportive housing for the homeless and permanent housing for low-income peoples in the City of Santa Rosa. The building provides a holistic solution that provides people experiencing homelessness with the means to achieve economic stability in a socially conscious and easily reproducible manner in addition to providing affordable units for low-income residents, informed by communication with social workers along with a prudent political praxis and the latest engineering techniques. To achieve this, HEARTH is shaped by passive and resiliency design considerations and composed of modular prefabricated components. In addition to these technical components, social programs are embedded in the function and operational life of the building, taking advantage of outdoor space for urban farming and utilizing the indoor commercial sector for a combined restaurant and food bank. Through participation in the operation of these facilities and with aid from social workers, residents will be able to achieve healthy and happy living. HEARTH emphasizes practicality, thus accordingly makes use of existing rent subsidization, wildfire relief initiatives, and voucher programs at the county, state, and federal levels to properly serve the low income and formerly homeless residents.

The building’s residential wings can accommodate a range of occupant groups, from individuals, who make up the largest percentage of the unhoused population in Santa Rosa, to small families who were displaced by recent wildfires. The first and second floors of the residential wings hold 20 total one-bedroom units. The layout of this unit type serves to maximize daylight in spaces that are majorly used and occupied during the daytime, such as the living room while placing bathrooms and other utilities farther back from the envelope. Wet walls are consolidated within and across units to ensure the simplicity and cost-effectiveness of plumbing systems.

structure.png

HEARTH’s structure and wall assemblies comply with Type 5-A construction according to the 2018 IBC. Due to HEARTH being a multifamily residential building with R-2 occupancy, the IBC allows the building to be 70 feet tall with four stories with the addition of NFPA 13 Automatic Sprinklers. HEARTH’s roof design allows seamless integration of insulation, HVAC, and fireproofing needs while keeping the roof dry and ventilated. A hidden gutter sits seamlessly behind the rainscreen exterior, hidden from view.


The building has a wooden structure - heavy timber for commercial space to accommodate longer span, light wood frame for residential. Light wood framing construction allows for a reduction in construction costs, embodied energy emissions, and construction time.


The exterior cladding is made from earthen terracotta tiles, hung from the exterior wall as a rainscreen. the 1/2” thick OSB sheathing is covered with 1 sided LP Flame Block which in combination with one layer of 5/8” type X gypsum board provides the walls with a 1-hour fire rating. The exterior envelope of the building is framed with 2x6 studs on 16” centers, allowing for 2 more inches of R21 fiberglass batt insulation.


The 9” prefabricated wooden truss floors are designed to minimize the depth of the floor assembly while allowing easy integration of mechanical and HVAC systems.


Download the full report.

 

Credit due:
Gene Lee and Bryan Huang for the renderings

Eva Wei for assistance on the structure

Gene Lee and Veronica Raga for assistance on the plans

Previous
Previous

Oasis

Next
Next

Restore House