Learning More About ICF Construction

By now, many people of heard of and are intrigued by green building techniques. Vertical ICF construction is one green building method that has seen resurgence thanks to its energy efficiency and environmentally friendly construction and installation process. Traditionally used in commercial building construction, ICF construction is as popular as ever in providing energy-maximizing savings and structural integrity to residential consumers. ICF, or Insulated Concrete Forms, are a type of wall that is generally made from cement-bonded wood fiber (usually made from recycled wood and cement) and polystyrene.

The strength of a building constructed with ICF technology will be unmatched in terms of strength, energy efficiency, noise reduction and comfort when compared to a structure built with typical wood frame construction. Termites and other pests and insects will not be attracted to insulated concrete forms, therefore eliminated the risk of having structural integrity compromised. ICF walls are mold, mildew and allergen resistant as well, so you can rest assured that your home would be a comfortable environment for you and your family.

Vertical ICF walls are ultra efficient when it comes to energy savings. Concrete and foam is the best insulator available for your home. You can save as much as 50% to 80% on your heating and cooling bills when comparing to energy costs of a traditional wood frame house. The high insulation value also makes it an ideal sound barrier, keeping exterior noises out of your home and interior sounds from escaping, allowing for better security and privacy.

Insulated concrete forms can withstand the highest winds that you would encounter with severe weather including hurricanes and tornados. Winds of up to 200mph are no match for ICF construction, and neither is fire. Insulated concrete forms are able to resist fire for up to 3.5 hours. Furthermore, ICF walls will resist mold and will not rot due to excess moisture, so your maintenance and general upkeep will be virtually non-existent.

Installation of insulated concrete forms is relatively easy and can be done quickly with an experienced green building contractor. Many ICF walls are made with recycled and environmentally friendly materials, non-toxic and not manufactured with any harmful chemicals such as formaldehyde. Installation is easy and even the waste products are kept to a minimum. Cleanup will be quick and easy, and the leftover waste products from the construction can be recycled.

It is easy to see why Vertical ICF construction techniques are gaining popularity, especially within residential buildings. The energy efficient, reinforced concrete walls have an unmatched fire tolerance, a high resistance to termites and pests, resistance to mold and mildew, and will result in the maximum amount of energy savings possible. The structural integrity of a home or building constructed with Vertical ICF walls will be much more enhanced to those constructed with traditional wood frames.

Green Building – Sustainable, Energy Efficient, Quality Construction Under Threat

In the midst of our recent economic crisis, the US federal government’s interventionist policies have again redeployed finite resources in contravention to market forces. Consumers and many custom builders have been pushing for better quality, sustainable, energy efficient construction. Unfortunately these market forces have been overcome by government intervention. The government has incentives for first time homebuyers who typically purchase cheaper starter homes. As a result almost all new construction is being undertaken by large tract builders who specialize in cheap housing. This end of the market is very price sensitive leading these builders to continued with larger designs that sacrifice quality for size.

Contrary to the belief of the US Congress, capital cannot be created by printing money or authorizing programs intended to create jobs. In a free market capital is deployed efficiently to areas with the best returns. When the government intervenes, it may skew the use of resources to less efficient enterprises. History provides us with numerous examples, but we do not have to look far back to see one of the best.

The deep recession we are experiencing resulted in large part from government interference in the housing market. The American dream has become the American nightmare. Successive governments, both Democrat and Republican, since the Great Depression have done everything they can to encourage privately owned housing. Government bureaucracies like the Federal Housing Administration and government sponsored, now government owned, entities like Fannie Mae and Freddie Mac artificially created a market for low interest loans to high risk customers. In a perfect storm, the Federal Reserve artificially depressed interest rates for a short-term economic boost.

Without artificially low rates and low credit standards, it is unlikely that the production of homes would have risen from 1.6M in 2001 to almost 2.1M by 2005. Post deflation the housing starts fell to 554,000 in 2009. At the beginning of the expansion, the Federal Funds Rate in January 2001 stood at 6%. When housing peaked the rate had been lowered to 1%. Not only did the volume of construction increase during that time, but the size of homes increase dramatically as did the price. Consumers were encouraged by lenders to purchase the largest home they could afford to take advantage of a once in a lifetime opportunity. Capital that might otherwise have been used in other areas of the economy was deployed in housing at artificially low rates. The result was catastrophic.

The same government is again intervening through first-time homebuyer tax credits. Coupled with low interest FHA loans having 3% down payments, they are creating some of the previously existing conditions. In addition to risking another bubble, the tax credits funded by all taxpaying Americans are being funneled to large corporate builders that specialize in low-end housing. This is evidenced by the fall in the median sales price in 2009 to $209,000 from a high of $262,000 in 2007.

Some of the larger builders have developed smaller plans, but they have mostly done so to meet the lower price points that the government influenced market demanded. They are not increasing the quality, sustainability or energy efficiency of their new homes. Though not all large home construction has stopped, only the truly wealthy, who tend to build better constructed homes, are still building. Homes of this quality usually include energy efficient systems and last much longer; both qualities of sustainable construction. Much has been written about “McMansion” homes, but generally homes in this market are not included. That is discussion for another day.

While tract home builders dominate the starter home segment, custom builders control the large home market. The real battle will be for the “move up market”. This market will determine the character of American housing for the foreseeable future. Move up consumers will chose between low quality, lower-cost homes built by large corporate builders and high quality, higher-cost homes built by small custom builders. Given the same available dollar for construction, the tradeoff is size for quality.

Assuming market forces determine lending limits, the average price of homes in the move up segment will likely remain much lower than previously experienced. At the peak the move up segment ranged easily into the $1M plus range. Those who grew accustom to the quality of higher priced homes will not likely abandon their affinity for hardwood floors, commercial-grade appliances, custom cabinets and granite tops. To match those features with a lower total budget, consumers will need to build smaller, high quality homes. The skill set to build these homes lies with the custom builder.

If Americans are truly interested reducing dependence on foreign energy and increasing sustainability in the housing market, we will need to decide to build smaller homes to offset the higher cost of quality construction. While it is possible that tract builders may chose to build smaller, their main advantage currently is delivering large size for a low price. Their organizations are not set up to deal with the custom aspects that would make their housing sustainable or more energy efficient. Through builder association programs custom builders have become much more educated in energy efficient, sustainable building to go along with their inherent quality.

The question now is whether the government will continue to incent consumers to continue a behavior pattern contrary to free market forces. If all new construction continues in the low end of the market, it will drive many of the remaining custom builders from the market. Already the number of builders belonging to professional organizations like the National Association of Home Builders has been drastically reduced. Most small custom builders are surviving only through remodel work, but if the market continues much longer many will likely move to other work. Rebuilding the knowledge base and expertise may take years and impact the overall quality negatively for year to come.

Green Homes | The Basic 10 of Green Construction Part V

This is the conclusion of a series of articles on the basic components of good green home construction. Having covered orientation, sealing the building envelope, insulation, efficient HVAC equipment, energy-saving appliances, upgraded windows, water conservation, and indoor air quality, we wrap up with durability and certification.

9 – Durability. One of the basic definitions of a green home is one that is built to withstand the test of time. What products offering increased durability will be used to construct the building envelope? What is the expected lifespan for the roofing and siding options you’re considering? For example, the estimated lifespan of metal roofing is more than 50 years, compared with 20 years at best for shingles. According to the manufacturers, concrete and copper roofing products are expected to last a lifetime.

One of the basic principles of durability begins with moisture mitigation. What products and methods will be used to protect the home from water intrusion through the roof, the walls, and/or around the windows?

Are termites a problem in your area? What termite-resistant products and procedures will be used in the construction of your home? Metal studs, borate-treated framing, installing irrigation and foundation plants at least two feet from the foundation, and exterior termite barriers are some of the possibilities.

Selecting products with durability in mind reduces replacement and maintenance costs down the road and increases the longevity of the home.

10 – Green Certification. Now that we’ve gone over the basics of green construction, you might be wondering if all green certified homes include these features. Not necessarily. The points selected from the green certification checklist and the green certification program chosen will determine the total green makeup of your home.

Your home can be certified as green through national programs such as LEED (Leadership in Energy and Environmental Design) designed by the U.S. Green Building Council, and the Green Building Program from the NAHB (National Association of Home Builders). In addition, many states have adopted their own green building certification programs. For a list of local green building programs, visit The National Association of Home Builders. Click the button on the left side of the home page entitled “Find a Local Program.”

Three components of a green certified home:

Whole-house approach: Although there are various green certifying organizations, they all require a whole-house approach to green construction. Because points must be selected from all categories within a certification program, all areas of the home are addressed. These categories generally consist of lot/site, energy-conservation, water conservation, health, and materials.

Inspection: A green certified home also means the structure was inspected during the building process by a green certifying agent to confirm that the selected green products and procedures were implemented or installed. The agent must provide documentation to an independent third party proving compliance with all selected points. If the third party is satisfied that the home meets all the requirements, it will award a green certificate.

Testing: Another aspect of the green home certifying process involves a series of tests on the home itself. These procedures measure whole-house air leakage (the blower door test) and ductwork leakage (the duct blaster and smoke test). Thorough and proper insulation installation is also reviewed through the thermal bypass inspection. (Note that not all tests are necessarily performed on every green home.) For an explanation of these testing procedures along with photos and a video of the ductwork smoke test, visit www.onestopgreenhome.com.



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Guest Writer Tracy DeCarlo

Tracy DeCarlo is author of The Difference is in the Details: The Homeowner’s Planning Guide for Building a Functional Home and owner of One Stop Green Home Certification.

Click Here To Purchase The Book

Green building tips by Tracy DeCarlo & Curt Roese, Orlando Green Home and realty specialists.

Green Homes | The Basic 10 of Green Construction Part IV

The 6 aspects of good green construction that we’ve discussed in parts I through III of this series all have a direct affect on energy conservation, a large part of green building. These next two components address building a healthy home and reducing the usage and subsequent cost of water.

7 – Water. Water conservation is another integral part of green construction. Only 3 percent of all water on earth is fresh, and 2 percent of that is frozen in icecaps and glaciers. Selecting low-flow fixtures, low-flush commodes, and installing low-volume irrigation all contribute to preserving one of the earth’s most precious resources.

Low-flow fixtures, defined as those that supply less than the standard 2.2 gpm (gallons per minute) for a sink faucet, 2.5 gpm for a showerhead, and less than 1.6 gpf (gallons per flush) for the toilets, are now offered by many companies.

Advances in technology have made significant improvements in the performance of these products. To make it easy to find and select water-efficient products with good performance, the EPA (Environmental Protection Agency) has introduced its WaterSense® program, a label that’s backed by independent testing and certification. Click here for a list of qualified low-flow products.

Irrigation is listed as the largest guzzler of household water. Green construction considers either eliminating the need for irrigation through the use of drought-tolerant turf, plants, and trees, or utilizing low-volume irrigation methods and efficient design to drastically reduce water usage while improving coverage. To find a professional proficient in water-conserving irrigation design and installation, visit the Irrigation Association. Ask your potential suppliers if they have taken the training courses and have experience designing and/or installing low-volume, efficient systems.

The three components of efficient irrigation include:

A reduced need for water: Reduce the need for irrigation by selecting native and site-appropriate plants and turf.

An efficient irrigation design: Implement an efficient design with features that include low-volume planting-bed irrigation, turf/bed zone separation, and sprinkler heads directed so that only turf and plants are being watered, not driveways and sidewalks.

Improved irrigation scheduling: Select an irrigation controller that provides the programming flexibility to water at the proper times, in the proper amounts for your area.

As discussed in last month’s article, Energy Star® dishwashers and washing machines also contribute to water conservation.

Rain harvesting through the use of cisterns is growing across the United States. Massive amounts of water can be captured from roof runoff, stored in cisterns, and utilized for irrigation, clothes washing, or flushing toilets. For more information visit The American Rainwater Catchment Systems Association, or The Rainwater Harvesting Community.

8 – Indoor Air Quality (IAQ). According to the EPA, indoor air quality is three to five times worse than outdoor air quality. The American Lung Association says that an estimated 34.1 million Americans have been diagnosed with asthma in their lifetime by a health professional. In 2006, over 6.8 million children under age 18 had asthma making it the leading chronic illness of children in the United States. Both asthma and allergies are exacerbated by poor indoor air quality.

Selecting products and features that contribute to indoor air quality is an important part of creating a green home. There are several components in this area from which to choose. The following are just a few:

Central vacuum system: Research at the University of California, Davis, showed that a prominent brand central vacuum removed allergens and reduced allergy symptoms by 47 percent for nasal, 48 percent for non-nasal, 61 percent for eye, and 44 percent for sleep. The EPA has acknowledged this product as an indoor-air-quality enhancer.

Low-VOC (volatile organic compounds) products: Many products such as flooring, paint, countertops, cabinetry, caulks, sealants, adhesives, and some insulation emit chemicals into the air in the form of gases. These chemicals, such as formaldehyde (a classified carcinogen), are known as VOCs. The good news is that low- or no-VOC options for all of these products are readily available.

Sealing the HVAC registers upon completion of the ductwork installation is a very simple, inexpensive procedure that contributes to improved IAQ. By preventing construction dust and debris from settling in the ductwork during the building process, the homeowner won’t be breathing in this mess (or cleaning up the dust) when the system is turned on.



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Guest Writer Tracy DeCarlo

Tracy DeCarlo is author of The Difference is in the Details: The Homeowner’s Planning Guide for Building a Functional Home and owner of One Stop Green Home Certification.

Click Here To Purchase The Book

Green building tips by Tracy DeCarlo & Curt Roese, Orlando Green Home and realty specialists.

Green Homes | The Basic 10 of Green Construction Part III

The fundamental elements of green construction result in energy conservation, water conservation, improved indoor air quality, and a more durable structure.

Having covered orientation and design, sealing the building envelope, improving the insulation, and upgrading the HVAC system in the first two articles, we continue the series with two more energy-saving basic green features.

5—Upgraded Windows: The windows are another feature that will influence the energy efficiency of the building envelope. The energy saving attributes of windows, such as insulated, gas-filled, double-pane glass; low-E coatings; and vinyl, wood, or fiberglass composite frames contribute to a lower SHGC (solar heat gain coefficient) and U-Value.

Solar Heat Gain Coefficient (SHGC): This rating is a measure of the percentage of solar radiation that enters a building as heat gain through a window, door, or skylight, a primary concern if you live in a warm climate. The SHGC rating tells you how well the product blocks heat caused by the sun. The lower the SHGC, the less solar heat is transmitted. For example, a window with an SHGC of 0.39 allows only 39 percent of the solar heat that hits that window to be admitted to the house; the remaining 61 percent is blocked. If you live in a warm region, look for windows and doors with a low SHGC.

U-Factor: The U-Factor or U-Value, as mentioned in the discussion of Low-E glass earlier in this chapter, is a measurement of the rate of heat loss. The lower the U-Factor of a window, the greater its resistance to heat flow and the better its insulation value. U-Factor is of primary concern if you live in a cold region. The NFRC tests for U-Factor in a simulated environment where it is 70°F inside the house and 0°F outside. It measures the heat loss passing through a window from the inside to the exterior. If you live in a cold part of the country, select windows with a U-Factor of 0.35 or lower.

These two figures appear on the NFRC (National Fenestration Rating Council) label affixed to the window. Check with your supplier to make sure the recommended windows have been rated by the NFRC. Click here for further explanation of the NFRC label and rating system.

The Energy Star® program uses NFRC ratings to determine if a particular window qualifies for an Energy Star® designation. The criteria for earning the Energy Star® seal vary from region to region. Click here to find the Energy Star® SHGC and U-Factor requirements for your climate zone.

Window size, placement, quantity, and specifications are considered in conjunction with home orientation and design, the first component of green building discussed in Part I of this series. This is just one of the reasons why a home design that’s focused on retaining the sun’s heat in winter and blocking it in summer can play a significant role in energy savings.

6— Energy-Saving Appliances: Energy Star® qualified appliances incorporate advanced technologies that use 10 to 50 percent less energy and water than standard models. Visit www.energystar.gov for information on all qualified appliances.

Not only are Energy Star® appliances more energy-efficient, they’re also quieter. And let’s address the water usage issue. For example, Energy Star qualified dishwashers not only use at least 41 percent less energy than the federal minimum standard for energy consumption, they also use about one-third less water than non-qualified models.

Front-loading washing machines also use less water, about 15 gallons less than older, top-loading models. When considering an Energy Star® machine, take a look at the Water Factor — the lower this number, the more efficient the machine. (Water Factor is a measurement of the number of gallons per cycle, per cubic foot, that a clothes washer uses. For example, if a machine uses 30 gallons per cycle and has a tub volume of 3.0 cubic feet, the Water Factor for that device is 10.0.)

Click here for a list of Energy Star® washing machines and their corresponding Water Factor.



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Guest Writer Tracy DeCarlo

Tracy DeCarlo is author of The Difference is in the Details: The Homeowner’s Planning Guide for Building a Functional Home and owner of One Stop Green Home Certification.

Click Here To Purchase The Book

Green building tips by Tracy DeCarlo & Curt Roese, Orlando Green Home and realty specialists.