American Institute of Architects
Green Architecture
Labor and Industries - Tumwater, WA

Green Architecture is a term used widely, by both practitioners and academics, that defines architecture as a product of its environment. This is accomplished in part by the necessity to sustain our natural resources, through sensitive siting and use of renewable and recyclable materials, in building design and construction.

Checklist for Environmentally Sustainable Design and Construction From the AIA Environmental Committee


DESIGN

Optimize use of interior space through careful design so that the overall building size and resource use in constructing and operating it are kept at a minimum.

Design an energy-efficient building.

Use high levels of insulation, high-performance windows, and tight construction. In southern climates, choose glazings with low solar heat gain.

Design buildings to use renewable energy.

Passive solar heating, daylighting, and natural cooling can be incorporated cost-effectively into most buildings. Also consider solar water heating and photo-voltaics - or design buildings for future panel installation. If wood heating is an option, specify a low-emission wood stove or pellet stove.

Optimize material use.

Minimize waste by designing for standard sizes. Avoid waste from structural over-design (use optimum value-engineering/advanced framing).

Design water-efficient, low-maintenance landscaping.

Conventional lawns have high impact because of water use, pesticide use, and pollution generated from mowing. Landscape with drought-resistant native plants and perennial groundcovers.

Make it easy for occupants to recycle waste.

Make provisions for storage and processing of recyclables: recycling bins near the kitchen, undersink door mounted bucket with lid for compostable food waste, etc.

Look into the feasibility of graywater and rooftop water catchment systems.

Water that has been used for bathing, dish washing, or clothes washing can be recycled for flushing toilets or irrigation. If current codes prevent graywater recycling, consider designing the plumbing for easy future adaptation. Rooftop water catchment for outdoor watering should be considered in many regions.

Design for future reuse.

Make the structure adaptable to other uses, and choose materials and components that can be reused or recycled.

Avoid potential health hazards: radon, EMF, pesticides.

Follow recommended practices to minimize radon entry into the building and provide for future mitigation if necessary. Plan electrical wiring and placement of electrical equipment to minimize electromagnetic field exposure. Design insect-resistant detailing that will require minimal use of pesticides.


SITING

Renovate older buildings.

Conscientiously renovating existing buildings is the most sustainable construction.

Evaluate site resources.

Early in the siting process carry out a careful site evaluation: solar access, soils, vegetation, important natural areas, etc.

Locate buildings to minimize environmental impact.

Cluster buildings or build attached units to preserve open space and wildlife habitats, avoid especially sensitive areas including wetlands, and keep roads and service lines short. Leave most pristine areas untouched, and look for areas that have been previously damaged to build on.

Pay attention to solar orientation.

Reduce energy use by orienting buildings to make optimal use of passive solar heating, daylighting, and natural cooling.

Situate buildings to benefit from existing vegetation.

Trees on the east and west sides of a building can dramatically reduce cooling loads. Hedge rows and shrubbery can block cold winter winds or help channel cool summer breezes into the building.

Minimize transportation requirements.

Locate buildings to provide access to public transportation, bicycle paths, and walking access to basic services. Commuting can also be reduced by working at home. Consider home office needs with layout and wiring.


MATERIALS

Avoid ozone-depleting chemicals in mechanical equipment and insulation.

CFCs have largely been phased out, but their primary replacements, -HFCs- also damage the ozone layer and should be avoided where possible. Reclaim CFCs when servicing or disposing of equipment (required by law) and, if possible, take CFC-based foam insulation to a recycler who can capture CFCs.

Use durable products and materials.

Because manufacturing is very energy-intensive, a product that lasts longer or requires less maintenance usually saves energy. Durable products also contribute less to our solid waste problems.

Choose building materials with low embodied energy.

One estimate of the relative energy intensity of various materials (by weight) is as follows:
Lumber = 1 Brick = 2 Cement = 2 Glass = 3 Fiberglass = 7 Steel = 8 Plastic = 30 Aluminum = 30.

Buy locally produced building materials.

Transportation is costly in both energy use and pollution generation. Look for locally produced materials (local softwoods or hardwoods, for example) to replace products imported to your area.

Use building products made from recycled materials.

Building products made from recycled materials reduce solid waste problems, cut energy consumption in manufacturing, and save on natural resource use. A few examples of materials with recycled content are cellulose insulation, Homosate, Thermo-ply, and recycled plastic lumber.

Use salvaged building materials when possible.

Reduce landfill pressure and save natural resources by using salvaged materials:
lumber, millwork, certain plumbing fixtures, and hardware, for example. Make sure these materials are safe (test for lead paint and asbestos), and don't sacrifice energy efficiency or water efficiency by reusing old windows or toilets.

Minimize use of old-growth timber.

Avoid lumber products produced from old-growth timber when acceptable alternatives exist. You may not need clear narrow-grained cedar or redwood siding, for example, when using an opaque stain or paint - as long as proper detailing is used to avoid rot. Laminated wood timbers can be substituted for old-growth Douglas fir. Don't buy tropical hardwoods unless the seller can document that the wood comes from well-managed forests.

Avoid materials that will give off gas pollutants.

Solvent-based finishes, adhesives, carpeting, particleboard, and many other building products release formaldehyde and volatile organic compounds (VOCs) into the air. These chemicals can affect workers' and occupants' health as well as contribute to smog and ground-level ozone pollution outside.

Minimize use of pressure-treated lumber.

Use detailing that will prevent soil contact and rot. Where possible, use alternatives such as recycled plastic lumber. Take measures to protect workers when cutting and handling pressure treated wood, and never burn scraps.

Minimize packaging waste.

Avoid excessive packaging, such as plastic-wrapped plumbing fixtures or fasteners that aren't available in bulk. Tell your supplier why you are avoiding over-packaged products. Keep in mind, however, that some products must be carefully packaged to prevent damage - and resulting waste.


EQUIPMENT

Install high-efficiency heating and cooling equipment.

Well-designed high-efficiency furnaces, boilers, and air conditioners (and distribution systems) not only save the building occupants money, but also produce less pollution during operation. Install equipment with minimal risk of combustion gas spillage, such as sealed-combustion appliances.

Install high-efficiency lights and appliances.

Fluorescent lighting has improved dramatically in recent years and is now suitable for homes. High efficiency appliances offer both economic and environmental advantages over their conventional counterparts.

Install water-efficient equipment.

Water-conserving toilets, showerheads, and faucet aerators not only reduce water use, they also reduce demand on septic systems or sewage treatment plants. Reducing hot water use also saves energy.

Install mechanical ventilation equipment.

Mechanical ventilation is usually required to ensure safe, healthy indoor air. Heat recovery ventilators are preferred in cold climates because of energy savings, but simpler, less expensive exhaust-only systems are also adequate.


JOBSITE

Protect trees and topsoil during sitework.

Protect trees from damage during construction by fencing off the "drip line" around them and avoiding major changes to surface grade.

Avoid use of pesticides and other chemicals that may leach into the groundwater.

Look into less toxic termite treatments, and keep exposed frost walls free from obstructions to discourage insects. When backfilling a foundation or grading around a house, do not bury any construction debris.

Minimize job-site waste.

Centralize cutting operations to reduce waste and simplify sorting. Set up clearly marked bins or trash cans for different types of usable waste (wood scraps for kindling, sawdust for compost, etc.). Find out where different materials can be taken for recycling, and educate your crew about recycling procedures.

Make your business operations more environmentally responsible.

Make your office as energy efficient as possible, purchase energy-efficient vehicles, arrange carpools to job sites, and schedule site visits and errands to minimize unnecessary driving. In your office, purchase recycled office paper and supplies, recycle office paper, use coffee mugs instead of disposable cups. On the job, recycle beverage containers.

 
Copyright © 2016 Rolf Lokensgard, All rights reserved.