fai 502961235 wine creek road home

8/6/2019 Fai 502961235 Wine Creek Road Home

1/19

The aim of this project was to built an energy efficient and sustainable house, taking account the smalldimensions of the parcel and the same time maximize the feeling of space and openess.

Wine Creek Road House

I choosed this small home for my first paper, cause;

-its a single family second home, user requirements overlap to design(ts not more than something it must have been)-pasivve and active energy efficient systems analiysised and used


2/19

Overview

Location: Healdsburg, CABuilding type(s): Single-family residentialNew construction

1,200 sq. feet (111 sq. meters)Project scope: a single buildingRural settingCompleted August 2002This modest California retreat evokes the spirit of local vernacular buildings and was designed to take maximumadvantage of the site and climate to make the house comfortable while minimizing energy use and environmentalimpacts.A single, large room contains living, dining, and kitchen areas on the south end, and is balanced by a bedroom andbathroom on the north end. A central, open breezeway integrates the outdoors into the heart of the house. Thehouse provides a variety of indoor and outdoor living spaces that can be used in different ways as climatic conditions

change over the course of the day or the year.Environmental Aspects

The chief strategy for saving energy was to keep the building cool during the long, hot summers without mechanicalcooling. This was accomplished by employing natural ventilation, thermal mass, and superior insulation. The thinbuilding section, the dogtrot, and placement of windows all maximize opportunities for natural ventilation. The interiorplaster walls and concrete floor provide enough thermal mass to minimize temperature swings, and integrate well withthe radiant heating system. Because this mass is cooled at night (just by opening the windows), the house remainscool through the hottest part of the day. The building envelope was developed using high performance, low-techinsulationstraw bales and cellulose insulation. Roof framing at 24 inches on center allowed for additional insulationand reduced thermal bridging.

Windows are wood, minimizing thermal bridging, and double-glazed with low-emissivity glazing. A highly efficientwater heater provides radiant floor heating. These measures resulted in a design that keeps the building cool exceptduring the hottest hours of the hottest days. The owners chose energy-efficient, low-water-use appliances.Owner & Occupancy

Owned and occupied by Kyra Subbotin, Individual(s)Typically occupied by 0 people, 0 hours per person per week; and 4 visitors per week, 24 hours per visitor per weekThis is a small , second home.Building Programs

Indoor Spaces: Other (40%), Living quarters (30%), Dining (25%), Restrooms (5%)Outdoor Spaces: Shadestructures/outdoor rooms (25%), Patio/hardscape, Drives/roadway


3/19

Team & Process

Predesign

A careful site analysis showed that good solarorientation provided few benefits on this site since

the sun was blocked by the surrounding hills formany months of the year. Based on this analysis, thedesign team (the architect, structural andmechanical engineer, working collaboratively withthe client) decided that the best strategy for savingenergy was to keep the building cool during the hotsummers without mechanical cooling.Design

This strategy was accomplished by employingnatural ventilation, superior insulation, and thermal

mass. Design integration was relatively simple on thissmall project.Early modeling and analysis led to minormodifications of building envelope and windowdesign until the designs were tuned for optimumsummer performance.Useful Information Resources and Software

EnergyPro 3.1 was used for energy modeling.

Finance & CostThis is a privately funded, second family home.Cost Data

Cost data in U.S. dollars as of date of completion.

Total project cost (land excluded): $375,000


4/19

Land Use & Community

This simple house was designed to fit the climate and vernacular tradition of itssetting, and in so doing evoke a strong sense of place. The design aspires to:Through form, be responsive to climate;

Be simple and adaptable for future use;Be timeless rather than trendy;Be a part of the landscape without dominating it;Embody the spirit of local vernacular buildings.The house also recognizes and values the surrounding ecological community.Design strategies address local climate and topography; minimize siteimpacts; and preserve natural habitats. All this contributes to making a senseof place. The breezeway, or "dogtrot," occupies the center of the building,integrating the outdoors into the heart of the house, and extending theenclosed living area to create a strong connection to the site and views

beyond.Green Strategies

Responsible Planning

Ensure that development fits within a responsible local and regional planningframeworkProperties with Excessive Impacts

Avoid developing prime agricultural landAvoid hilltop propertiesAvoid properties with excessive slopesAvoid properties that would require excessively long and excessively

damaging access roadsSupport for Appropriate Transportation

Design development to have pedestrian emphasis rather than automobileemphasisProperty Selection Opportunities

Select already-developed sites for new development


5/19

Site Description

The approach was to minimize impacts on the site and take advantage of site conditions for cooling. The site is a sloping,east-facing meadow, cleared over 100 years ago, surrounded by oaks and conifers, overlooking the vineyards of the DryCreek Valley in Sonoma County. This meadow sits above the vineyards as they merge with steep hillsides. Careful site

analysis determined that steep hills to the west and south limit good solar access and passive heating. This conditionkeeps the house cool in summer. The most exposed condition, the glassy bay facing the eastern view, was located to beshaded by a large black oak.The owners wanted to maximize the feeling of space and openness on this small parcel. The house is situated on theupper edge of the site to preserve the meadow below and maximize views beyond. This placement also allows thebuilding to fit into the site without dominating it, while providing a sense of prospect and refuge. The house was placedon contour to minimize grading, changes in site drainage patterns, and site disturbance; only one tree was removed tomake way for it. Landscaping was limited to restoration of native grasses and wildflowers.Water was conserved by reducing demand. Low-flow plumbing fixtures and appliances were used throughout the house.Low-water-use native landscaping will use drip irrigation only until established. Site drainage patterns remain largely

unchanged, with almost all water remaining on site. Metal roofs were installed to facilitate future rainwater collection.Lot size: 2.50 acresBuilding footprint: 1,090 sq ft (101 sq meters)Previously developed landGreen Strategies

Landscape Plantings

Landscape with indigenous vegetationLow-Water-Use Fixtures

Use low-flow toiletsIntegration with Site Resources

Celebrate and enhance existing landscape featuresIrrigation Systems

Use appropriate grading to retain irrigation and reduce runoffUse water-efficient irrigation fixturesSiting Analysis

Assess regional climatic conditionsInvestigate microclimate (specific variations from regional climatic conditions)Site Planning

Protect and celebrate a sites uniquenessSite buildings so as to help occupants celebrate the natural beauty

Site building(s) where existing vegetation can reduce energy use


6/19

Energy

Since passive-solar design was not an option, giventhe topography of this site, the chief strategy forsaving energy was to keep the building cool during

the hot summers without mechanical cooling. Thiswas accomplished by employing natural ventilation,superior insulation, and thermal mass. The thinbuilding section, the dogtrot, and the placement ofwindows maximize opportunities for naturalventilation. The house is well shaded by steep slopesand trees.The building envelope was developed using high-performance, low-tech insulationstraw bales andcellulose insulation. The interior stucco walls and

concrete floor provide enough thermal mass tominimize temperature swings. When this mass iscooled at night (by opening the windows), thehouse remains comfortable through the hottesthours.Efficient wood roof framing allows for additionalinsulation and reduced thermal bridging. Windowsare wood, also minimizing thermal bridging, anddouble-glazed with low-e2 glazing. An efficientwater heater provides radiant-floor heating. These

measures also help keep the building cool andresulted in a design that exceeds Title 24 Standard(without mechanical cooling) by 29%, even with thelarge amount of glazing and wall perimeter for thespace enclosed. (Note that the Title 24 EnergyStandard assumes air-conditioning, and that duringsome hot periods this house will be warmer than itwould be if air-conditioning were provided.) Theowners also chose energy-efficient lights.


7/19


8/19

Energy

Green Strategies

Wall Insulation

Use advanced framing techniques

Solar Cooling LoadsShade south windows with overhangsShade building walls and roofs with treesDaylighting for Energy Efficiency

Design an open floor plan to allow exterior daylighting to penetrate the interiorHot Water Loads

Use water-efficient dishwashersUse water-efficient clothes washersUse water-efficient showerheadsNon-Solar Cooling Loads

Provide high-low openings to remove unwanted heat by stack ventilationUse siting and topography to enhance summer breezesProvide an open floor plan and openings located to catch prevailing breezesUse operable windowsMake a high internal thermal mass buildingUse ceiling fans to improve comfort at higher temperaturesWater Heaters

Use water heaters with energy efficiency ratings in the top 20%High-performance Windows and Doors

Optimize energy performance of glazing systems

Choose frame and sash materials with low thermal conductivityHeating Systems

Use hot water heat distributionRefrigerators and Freezers

Use a high-efficiency refrigeratorOther Energy-Efficient Appliances

Use high-efficiency clothes washersRoof Insulation

Achieve a whole-roof R-value of 25 or greater


9/19

Materials & Resources

As an outgrowth of efforts to reduce wood use, the architects developed a roofassembly that uses less wood than typical exposed wood ceilings. 1 x 3's sandwich 2 x 12rafters and hold up the finished ceiling panels and insulation. The insulation fits in the

cavity between the 2 x 12's, eliminating the need for a second insulated assemblyabove the exposed rafters. The 1 x 3 trim and rafter edges are detailed to read as anassembled series of beams that articulate the ceiling plane.Other materials were selected for environmental performance and durability as well asfor aesthetics. Criteria included using materials and energy efficiently, prolonging the lifeof materials and systems, providing a healthy indoor environment, reducing lifecycleimpacts, and reducing wood use. Materials include:Certified lumber, windows, and doors (renewable resource);35% flyash concrete (reducing CO2 emissions);Cellulose insulation (high recycled content, formaldehyde free)

Low-VOC paints and adhesives, (improved indoor air quality);24 inches on center framing (reducing wood use);Fiber-cement siding (durable, reduces wood use);Countertops from recycled glass (durable, recycled waste product);Straw-bale walls (insulation, recycled waste product);Stucco over straw bales (durable, mass, structure).The house was designed to evolve along with occupant needs. The living space of thishouse is designed as one simple large room that can be used in a variety of ways. Theroom opens to the landscape on all four sides in different ways. The alcoves off this roomcan be used as part of the room or separated. The dogtrot is also designed as a flexible

space, covered and protected from the sun, but otherwise outdoors, that can serve asentry, living space, or dining space. The house provides opportunities to use the spacesprovided in different ways depending on use, season, and time of day.Materials, such as exposed, stained concrete floors and stucco interior wall finishes, wereselected for durability and ease of maintenance. Both of these finishes are part of thestructure of the building. In these two cases, the structure is the finish (the interior stuccois part of the shear wall system). Both are integrally colored, and so will not require paint.

Building systems and appliances are low-tech and require little water and energy.


10/19

Materials & Resources

Green Strategies

Reusable Components

Use materials with integral finish

Design for Materials Use ReductionUse advanced framing (optimum value engineering) to optimize material useConsider the use of structural materials that do not require application of finish layersPlan for Materials Longevity

Use fiber-cement sidingQuality of Materials and Workmanship

Provide to contractors (or require from designers) detailed and complete plans and specsNatural or Minimally Processed Materials

Use straw bales to construct non-load-bearing (infill) wallsGreenhouse Gas Emissions from Manufacture

Replace up to 30% of the cement in concrete with flyashPost-Consumer Recycled Materials

Prefer insulation with high recycled contentMaterials and Wildlife Habitat

Use wood products from independently certified, well-managed forests for rough carpentry

Use wood products from independently certified, well-managed forests for finish carpentry


11/19

Indoor Environment

The building is naturally lit, and opens to the natural setting. The house isdesigned to promote natural ventilation, improving indoor air quality whilereducing the need for mechanical cooling. Radiant heating works well

with the thermal mass to provide comfortable warmth withoutcompromising air quality. Personal control in this low-tech environmentconsists of opening and closing windows and doors, and occasionallyturning on a ceiling fan.Structural materials serve as interior finishes wherever possible, reducingthe need for additional applied finish materials. Al l interior materials andfinishes are formaldehyde free and contain low to zero VOCs.Nature is always close at hand in this environment, and extra efforts to linkthe indoors and outdoors abound in framed views, in the many doors,and in the dogtrot.

Green StrategiesThermal Comfort

Use glazing with a low Solar Heat Gain CoefficientProvide occupants with the means to control temperature in their areaVisual Comfort and The Building Envelope

Use large exterior windows and high ceilings to increase daylightingChoose interior and exterior glazing to maximize daylight transmissionVisual Comfort and Interior Design

Design open floor plans to allow exterior daylight to penetrate to theinterior

Ventilation and Filtration SystemsProvide occupants with access to operable windowsDesign for optimum cross-ventilation through window placementAbove Grade Humidity and Condensation

Design building envelope to avoid thermal bridgingReduction of Indoor Pollutants

Use only very low or no-VOC paintsAvoid wall-to-wall carpet


12/19


13/19

AWA R D S2005 Energy & Sustainability Design Awards, Merit Award, AIA San Francisco2004 Exceptional Residential, Bay Area Regional Design Awards, AIA East Bay2004 Excellence in Design Awards, Runner Up, Environmental Design + Consturction2003 AIA-Sunset Western Home Awards, Merit Award2003 Earth Day Top Ten, Natl AIA Committee on the Environment2003 Pacific Coast Builders Conference Gold Nugget Awards, Merit Award for Sustainable Residence

Lessons Learned

Innovative and unusual building assemblies always impart lessons, even when the design team is experienced in thetype of innovative approaches used. The places where these systems intersected, where straw-bale walls met radiantfloors and exposed ceilings, for example, required special attention. Fortunately, by working collaboratively with a goodcontractor, cost-effective solutions to problems that arose were worked out in the field.The wood ceiling design saved a modest amount of lumber, but was no less expensive to build. We are still trying todevise a good detail for insulating the edge of a radiant slab before it meets the footing without resorting to a toppingslab.The good news is that the house was occupied in late mid-summer, and has proven itself by remaining comfortable

during the hottest weather.


14/19

Wine Creek Road House


15/19


16/19


17/19


18/19

This small family retreat was designed to make the most of itssmall site, while reducing heating loads and environmentalimpacts. The house is located at the top of sloping meadow,situated to capture views across and beyond the largest openspace on the site, and to protect the building from the hotafternoon sun. The living spaces are situated around a coveredoutdoor space, or dogtrot, with living spaces on one

side and a bedroom and bathroom on the other. The dogtrotis the focal point for outdoor living. The simple bar shapeof the building is punctuated by two bays. The kitchen bayopens to views up the steep hillside behind the house, whilethe living room bay opens to dramatic views of the meadowand the valley below. This bay also serves as a sleeping areafor children or guests. The straw-bale construction eliminatesthe need for cooling in this hot, dry climate.


19/19

fai 502961235 wine creek road home

Documents