habitat for humanity- dream dallas home design

dream dallas home design competition mid century modern revival / #32

project summary

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strategy diagrams

systems perspectives

LEED analysis

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site typologies

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exterior elevations

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costs analysis

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visualizations

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_precedent charged by dallas habitat for humanity and the dallas ica to create a house that is modern, economic, and sustainable within a vernacular texas style of our choice, we as a team began by finding the core values inherent in each style and discovering what fit best with our vision.

Mid Century Modern was a time when the charge of architecture was culture not industry, and the evolution of space was about economy and craft. use of prefabrication along with conventional construction began a new stride in the style of architecture across the nation. The house became about shelter and the eternal communication between indoor and outdoor environments.

In addition to the stylistic vernacular we also studied the physical building typologies inherent to Texas and the gulf coast region. In our investigation we explored two distinct forms of vernacular architecture in conjunction with mid century modern.

The “shotgun” is a long bar of a house with all rooms group in rows and stoops that adorn the front and possibly rear of the house. It is an economical easily constructed typology.

The “dogtrot” is a passively configured plan type that utilizes a bisecting covered “porch” usually splitting the program space in two to collect prevailing winds thus decreasing necessatation of mechanically cooled spaces (in temperate weather) combined we can develop a scheme that is compact yet spacious and delivers a passively cooled, historically inspired, economic product.

_concept

compaction and sustainability was our main focus. the linearity of the site lent itself to design a two bar scheme. the bars slip past one another to form served and service spaces while generating a compact plan. the public and private zones are bisected using an open to air “dogtrot” breezeway that at times can double as anciliary space. a series of “mass” walls direct spatial layout and shelter the building from solar heat gain. cedar infill panels, low slung roof planes, expansive glazing and a central hearth are evocative of the mid century modern period.

_construction

drawing inspiration from mid century modern architecture, we implemented a 4-foot module, optimizing the use of conventional building materials and facilitating an ease of construction. CMU blocks and structurally insulated panels (SIP)require minimal cutting and virtually eliminate on-site waste. the use of reclaimed masonry, cedar siding and railroad ties also contributes to the environmential responsiveness of the house.

_stewardship

we spend 80% of our time indoors, as such it is only reasonable that our buildings be responisve and interactive to the environment in which they are sited. in this design the decision to collect and use rainwater should prove beneficial for the house. Rainbarrels on the east facade collect and store rainwater for a subsistence garden in the rear yard, a bioswale becomes the sited street edge, remediating runoff from the roof and the street prior to discharge into the remainder of the site. reclaimed and recylced materials, high efficiency envelope components and proper planning yield a sustainable,successful design that is true to the core values of mid century modern and expressive of sustainability + economy.

project image

typical frame 2/3 impervious

typical frame

mirror public pervious edge

“L” plan

pervious edge

“L” plan mirror public court

density box

pervious fringe

double box

dissolution of yard

“L” internal private court

“L” plan

pervious public edge

bar edge

public garden

shifted bar

pervious edge + 2/3 permeable

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pueblo street

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recycled railroad tie walk

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bedroom

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pervious drive

garden 11 bioswale

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native grasses

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garage

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utility

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living

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kitchen

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dogtrot

shotgun-stoop edge, external court

country porch- external court, urban edge

shotgun + country porch minimizes passive strategies

country porch internal edge

shotgun + dogtrot + country porch exceeds site usage

country porch + shotgun disolution of entry

shotgun + country porch maximum external exposure

country porch + dogtrot axial plan = space division

dogtrot - passive cooling, internal court

dogtrot + porch definitive edge condtion

dogtrot + shotgun external court + definition of site

dogtrot + porch + shotgun external court + passive cool + implied urban edge

summer

high noon

reflective roof surface bounces back solar radiation

winter insualted roof panels mitigate transmitted heat

solar study constructed dogtrot passively collects and distributes temperate breezes into living spaces

operable window units help infiltration of prevailing breezes east/ west house placement promotes cross ventilation

passive breeze collection strategic openings help infiltration of temperate breezes

street edge bioswale collects roof and street runoff and filter the water by natural means

rain water rentention

rain barrels collect roof runoff for irrigation purposes

minimzation in openings at western facade helps reduce cooling loads

“dogtrot� breezeway enhances passive cooling in temperate weather

deep overhangs prevent harsh west light native planting fosters water remediation and a maintenance free yard year around

west elevation

site bioswale set at western edge becomes a visual buffer at the street edge

recycled railroad ties provide an attractive walk and house marquee

reclaimed cedar shiplap adornes the facade as a rot resistant siding material

rain barrels collect and store roof runoff for irrigation purposes

1979 1 979 79 pueblo pu blo pu

south elevation

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c erspe p n o secti

iving l h g throu

room

generic tin roof $1/sf 2000 sf

$8000

doors and windows

2x dinensional lumber

$2.50/sf 800 sf

varies $8000

roof SIPS and rafters

metal roof panel

concrete foundation

reclaimed shiplap cedar panels

$10000

misc.framing

$600

millwork

$8000

roof framing

interior finishes

$6000

hvac

$12000

4”d x 8”h x 16”l recycled cmu

4’ x 8’ nominal SIPS

$2.65/sf 1100 sf

cmu walls

plumbing

$10000

lighting

$3.30/sf 1265 sf

SIPS

$4000 site and landscape

$12000 = $85,600 or $66.15/sf

costs analysis

LEED FOR HOMES

pts. possible

pts. achievable

ID

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LL Location and Linkages Site Selection Preferred Locations Infrastructure Community Resources Access to Open Space

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SS Sustainable Sites Site Stewardship Landscaping Local Heat Island Effects Surface Water Management Nontoxic Pest Control Compact Development

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WE Water Efficiency Water Reuse Irrigation System Indoor Water Use

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EA Energy and Atmosphere

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Optimize Energy Performance Water Heating Residential Refrigerant Management

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MR Materials and Resources

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EQ Indoor Environmental Quality

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Integrated Project Planning Durability Management Process Innovative Or Regional Design

Efficient Framing Environmentally Preferable Products Waste Management

Energy Star with IAP Combustion Venting Moisture Control Outdoor Air Ventilation Local Exhaust Distribution of Space Heating and Cooling Air Filtering Containment Control Radon Protection Garage Pollutant Protection

AE Awareness and Education

Education of Homeowner or Tenant Education of Building Manager

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rainwater collection for irrigation

reclaimed and efficient framing material = less waste, more efficiency

bio swale for water collection/ remediation

subsistence gardern promotes off grid living

LEED analysis

western facade