Review of green building march 2011Presentation Transcript
Green building is just applying common sense. Green building is the convergence of 5 fundamental objectives Waste management practices Conservation of natural resources Increasing energy efficiency Improving indoor air quality Connectivity to community
Home Size In 1950 In 1970 297 SF/personaverage floor area 1,000 SF 1.6 x 1950 3.37 people per household 478 SF/person average floor area 1,500 SF In 2000 3.14 people per household 2.8 x 1950 840 SF/person average floor area 2,200 SF 2.62 people per household
WASTE GENERATION - millions of tons each year 20% from construction and demolition industry
10% of construction debris is clean unpainted wood
RESOURCE USE Construction of a 2,085 sq ft home uses up to 1.5 acres of forest 95% of old growth forests have been depleted
Generation and use of energy (electric, gas, oil, coal) are major contributors to air pollution and global climate change.
INDOOR AIR QUALITY We spend 90% of our time indoors Air inside the average home is 10 times more polluted than outside air on the smoggiest days
locally produced, minimally-processed, durable and able to be maintained, low in embodied energy, high in recycled-content, and readily-recyclable.
Fly Ash is a byproduct of coal burning power plants Use of flyash in concrete diverts it from landfills. The U.S. produces 1.3 billion tons of Portland cement annually. This emits 1.3 billion tons of CO2 into the environment. Attributes: Results in a less permeable concrete More durable Less shrinkage leads to reduced cracking
Concrete and rubble can be crushed and used for backfill and drainage purposes at the base of foundations Using recycled instead of virgin materials saves money and natural recourses
FSC certification assures that the forest from which the wood is produced is managed in an environmentally and socially responsible manner
SIPs are high-performance, load bearing panels that consist of a core of foam insulation with OSB on either side. They are generally R-4 per inch
Advanced framing includes many wood saving techniques: Framing 24” on center 2-stud corners Stacking trusses over studs Use single top plates
Builders’ Guide online at www.RECYCLENOW.ORG Hardware Lumber Plumbing Tile Windows Reclaimed wood
Two types of recycled content decking Plastic lumber Contains only recycled plastic resins Check manufacturer for amount of expansion Composite lumber Made with recycled wood fiber and recycled plastic resins formed into deck boards Not for use in structural applications
Fiber-cement siding is composed of: Cement, sand, and cellulose Textured to look like wood siding or stucco finish Replaces conventional wood siding or stucco finishes
A green replacement for gypsum drywall, 80% recycled content; Low VOC emissions (meets CA 01350); Highly resistant to mold.
Minimize the amount of fresh water used within buildings and outside for landscaping.
Non Invasive Species No Species Require Shearing Drought-tolerant Natives Minimal Turf Areas Plants Grouped by Water Needs (Hydronizing)
Use High-efficiency Irrigation SystemsDrip, Bubblers or Low-flow Sprinklers
Water Catchment Filter
Insulate Water Heaters & Pipes
Locate Water Heater within 12 Feet of All Fixtures
Toilets Dual-Flush or maximum 1.6 gpm Showers use max 2.5 gpm Faucets use max 1.5 gpm
Energy efficiency is the cornerstone of any green building project.
Direct Gain: Sunlight shines into and warms the living space.
Isolated Gain: Sunlight warms another room (sunroom) and convection brings the warmed air into the living space.Sunroom
Plant deciduous trees for shade Natural ventilation is a key cooling strategy Install window overhangs and awnings
COMPACT FLUORESCENT BULBS Saves up to $120 over the life of the bulb Lasts up to 10 years Use Recessed Lighting with CFLs Insulation Compatible Air-tight (IC-AT) recessed lighting fixtures are sealed
Lighting controls include: Dimmers Sensors and timers Install either at specific locations or as a whole house system
Ceiling fans improve interior comfort: Can be adjusted to either draw warm air upward during the summer or push warm air downward during the winter Best locations are bedrooms and living rooms
Solar attic fans exhaust heat from attic spaces in summer and clear condensation in winter Attics can reach up to 150 degrees F. Heat can migrate into the house
Soffit/eave ventilation and gable/continuous ridge ventilation exhaust excess heat and moisture from attic spaces by natural convection.
Whole house fans cool a house without the use of air conditioning Exhaust warm, indoor air Bring in fresh, cool, outdoor air at night Fan mounted in a hallway ceiling on the top floor
Energy efficient refrigerators can use up to 30% less energy Look for Energy Star appliances Check with local utilities for rebates on Energy Star appliances
Exceed the Title 24 Standard for your climate by at least 20%
Avoid damp blown cellulose during wet months The binder reduces the chance of settling. Cellulose is treated to retard insects and fire
Install expanding foam or caulk to prevent infiltration where wood connections are made or framing is drilled to provide plumbing and electrical runs.
Low- E double-glazed windows Low-conductivity frames Look for windows that have a National Fenestration Rating Council (NFRC) label
U-factor A measure of heat transferred by the entire window (frame, sash, and glass) either into or out of the building. Visible Transmittance (VT) Select a window with a high VT. Solar Heat Gain Coefficient (SHGC) Air Leakage (AL)
PHOTOVOLTAIC PANELS (PV) SOLAR HOT WATER
Attached garage is the single most significant contributor to poor indoor air quality (source: U.S. EPA)
Low/no-VOC products are manufactured without: Mercury or mercury compounds Pigments of lead, cadmium, chromium or their oxides Low/no-VOC paints are readily available
Conventional solvent-based wood finishes can off-gas for months Low VOC finishes are lower in toxic compounds Can be used in most applications If solvent-based wood finishes must be used, they should be left to off-gas for 3 to 4 weeks prior to occupancy
Low/no-VOC adhesives reduce toxic gasses like aromatic hydrocarbons Can be used for all interior applications Flooring Countertops Wall coverings Paneling Tub/shower enclosures
Engineered sheet goods (particleboard, medium density fiberboard (MDF) typically uses adhesives that contain urea formaldehyde Alternative sheet goods include materials made without formaldehyde
Replaces vinyl flooring Contains petroleum-based products or chlorinated chemicals such as PVC which off gases VOCs Lasts only 7-10 years Manufactured from natural materials like flax seed, jute, and linseed oil Can last up to 40 years
For slab-on-grade additions or basements Great for radiant, in-floor heating systems Durable and easy to clean
Consumer label, tied to independent field verification Ratings reflect practices ABOVE code in CA Resources for local govt. policies & incentives Quantifies environmental benefits Complementary to LEED for Homes
Commit to the integrative design process Hold a charrette Have regular meetings Establish communication protocols Identify scope of responsibilities and interactions for all parties
Identify what aspects of green building are important to your client Talk with your client, subcontractors, and architect about building green Use the Green Point Rated or LEED Guidelines to develop project Ask your local supplier to stock green building materials Get continual training for yourself and your employees Implement green practices into your business