Here's another great tip from BobVila.com. As green building hits the mainstream, you ll continue to hear many new terms. One of them is LEED certification. L-E-E-D, or Leadership in Energy and Environmental Design, is a set of green building techniques and standards that make it easier for state and local governments, builders, architects, designers and homeowners to build sustainable and healthy buildings. LEED rates the whole building in five key areas: sustainable site development, water savings, energy efficiency, materials selection and indoor environmental quality. LEED-certified buildings conserve energy and water and cost less to operate. They send less waste to landfills and less greenhouse gas into the atmosphere. Best of all, they re healthier and safer for the people who live and work in them. As an added bonus, LEED-certified projects also qualify for tax rebates, zoning allowances and other incentives in hundreds of cities nationwide. LEED certification program standards are set by committees selected from all parts of the building industry and administered by the U.S. Green Building Council. These standards can be used in both existing buildings and new ones. LEED certification doesn t just make homes, schools, commercial buildings and neighborhoods more efficient and healthy. It also makes them more profitable and enduring. So, hiring a LEED-accredited professional for your next big project can be a win-win situation. Find out more at BobVila.com: The ultimate home improvement web site! BobVila.com 2008

This home will be about 50 percent more energy efficient than a typical Florida home. Bill Zoeller, a consulting architect with Mercedes, has changed specifications and products to make this home as efficient as possible. First, there are low-e insulated windows that will block about 70 percent of solar heat gain. The solid concrete walls are insulated with one inch of polyisocyanurate insulation board that is applied directly to the concrete walls. This insulation, which has the highest R-rating of any insulation on the market, will block the heat buildup during the day from reaching inside the home. In addition to Energy Star-rated appliances, the air conditioning ducts have been dropped to the attic floor and surrounded with insulation to reduce the efficiency challenge presented by running ducts through hot, Florida attic space. This technique was developed in California and is now part of their energy code. Dropping the ducts, wrapping them in insulating foam, and covering them in a polyurethane insulating foam improves efficiency and blocks condensation buildup in this humid climate. Lance Keeling, of BioBased Systems, explains that this foam insulation is soy-based but converted through chemical reaction to become completely inert to eliminate organic matter that could promote mold or mildew growth. This chemical is pressurized and sprayed with a hose to form a foam that sets up in moments. This foam provides a 4.8 R-value per inch but with a desired value of 6 from this part of the insulation, must be sprayed at a 1 1/2-inch thickness. This completely encloses the ducts to prevent any air loss and resulting moisture buildup. If a homeowner were to attempt covering ducts with commercial insulation, potential moisture buildup could be produced causing mold and moisture growth. The key with this technique is that it completely seals the ducts to prevent air loss and resulting moisture buildup. Zoeller and Keeling predict a savings of $100 per month in operating expenses due to the energy-efficient measures employed. Zoeller shows Bob the 14 SEER (seasonal energy efficiency ratio) heat pump air conditioning unit installed to cool the house. It is about 40 percent higher in efficiency than a traditional air conditioning unit. While initially more expensive, a smaller unit can be installed due to the high-efiiciency of the overall home.

Bob and Ryley install a Maytag Neptune washer-dryer set. Manufacturer's representative Jay Klosterman describes the product's energy saving features. The Neptune is a horizontal-axis (also called front-loading) washer that uses half the water of a conventional washer, saving energy and money. They also use less laundry detergent, and still get clothes cleaner with less wear. Consumers should save up to $100 per year. The Neptune Washer qualifies for Energy Star and cash rebates from many utilities. The cycles of the washer and dryer are synchronized so that you can move a load from the washer to the dryer without waiting.

Homeowner and contractor Nick Beasley walks Bob through the progress to date in the master and kids bath, including leveling the floors, building partition walls, and installing cementitious board for the wall and floor tiles. Beasley explains how they discovered inadequate framing for the windows when they removed the wallboard on the exterior wall. They reframed the wall with a header, making it structurally sound, and prepared to install matching windows. Beasley shows how to open up the building wrap and prepare a watertight window installation. He begins by cutting the building wrap down the middle, to the two bottom corners, then across the top. He staples the paper back and trims the excess away. He then uses Pella's waterproof self-adhesive tape along the bottom sill and up six inches on each side. He doubles up the bottom pieces and lets the exterior section extend 1/2 inch so that water will flow to the exterior and away from the house. He explains that it's important to work from the bottom up when waterproofing a window so that any water that gets in will run down and away, not getting caught behind any flap as it runs. Beasley opens up the nailing flange and roughs in the window before checking it for level and plumb. They shim the window at the bottom, middle, and top before checking again for level and plumb, and nailing it into place. They finish the installation with low-expansion insulation foam to fill the voids around the window. Beasley stresses that it's important to use low-expansion foam so that it won't expand too much and push te window out of plumb or cause difficulty for window operation. Cordell Burton is then back with Bob to review the Pella Architect Series windows the Beasleys selected for their 1895 home. These two-over-one wood interior and aluminum-clad exterior windows are Energy Star rated for high efficiency and feature replica-style hardware. They are constructed of double-pane low-e glass and are argon-filled for maximum energy efficiency.

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