Lawmakers are weighing a huge expansion of construction work to improve the energy-efficiency of public buildings across the state.

The Legislature two years ago set aside an unprecedented $360 million for household-level energy efficiency projects.

A comparable figure could go toward contractors to cut energy consumption at public buildings — schools, state and city offices and other facilities — under a plan moving through Juneau.

Click here to read the full story.

Houses in Quinhagak battered by decades of fierce wet winds might soon be replaced by a new model that hearkens back to traditional Native sod houses.

At a meeting last week, village leaders in the Southwest Alaska community accepted a preliminary plan for an energy-efficient home that could be a prototype for other houses in the village.

Click here to read the full story.

If you are like me, you’ve been watching the Olympic Games and enjoying the competition. I always look forward to the games, winter or summer, because it’s inspiring to see how dedicated these athletes are to their sports.

One thing to think about, anytime there are large events like these, is what is the environmental impact? Along the lines of global climate change, these games have been impacted by the effects of a warm winter. With Vancouver being within a few hours of Seattle, it’s something I think about, particularly knowing that they have been having the same warmer than usual temperatures which has been affecting their snow pack this year.

Click here to read more.

For homebuyers, green is fast becoming a priority — whether it’s because they want to reduce their energy costs, minimize their carbon footprint or improve indoor air quality.

Here are 10 questions that prospective buyers or renters ought to ask to find out how green a house or apartment is.

Click here to read more.

By CCHRC Staff

Q: What are some of the risks with adding insulation to the outside of my home?

It is a complex issue, and what works in one part of the state may not necessarily work in another. The key to successful exterior insulation is to keep moisture from entering the wall from the inside and from the outside. If you cannot ensure this will not happen, then you are insulating at your own risk. If too much moisture moves into your walls or ceiling, then you could end up with mold and rot.

For years, people in Fairbanks and other parts of the state have been applying various amounts of foam insulation to the exterior of their houses. However, this method can also contribute to moisture problems if not done correctly. These problems can originate from inside or outside the house.

In local building code, cold climate construction requires a vapor retarder, placed near the interior wall surface. Most times this consists of a well-sealed layer of polyethylene under the sheetrock.

This barrier membrane is designed to prevent indoor moisture from getting inside walls where it can condense. When you have heat and humidity inside, and a leaky vapor barrier, moisture may get inside a wall. If there are not enough outside layers of foam insulation, this moisture will cool, condense and begin causing problems. Having the proper ratio of insulation on the outside of the wall to insulation on the inside of the wall will help solve this problem.

Also, if you have a good existing interior vapor retarder and add exterior foam, you are creating, what many call, a “double vapor barrier,” as the foam is also relatively impermeable. Should enough moisture find its way into a wall under these conditions, it may have a difficult time drying out.

In some environments, there is the possibility that rain water can work its way into the wall, especially in combination with wind. To minimize these problems, your home may benefit from large overhangs, gutters and proper drainage. Another option is a good draining type of house wrap installed in combination with adhesive or metal flashings, which are applied before putting on the foam. These steps will ensure that if any water gets behind the foam, it will drain down into the ground rather than soak into your framing.

If you put exterior insulation on your house, it will become much tighter. As a result, your indoor humidity levels may increase and the house may no longer receive enough fresh air, making it necessary to better ventilate your home.

An early indicator of elevated indoor humidity levels are your windows. If you are seeing a lot of condensation, especially on a good quality doublepane or triple-pane, that is a good reason to look for a cause.

Q: Are electric stoves more energy efficient than propane ranges?

Strictly, electric energy is very efficient in a range, but it depends on what the cost of propane is, and what the cost of power is in relation. You would have to figure out how much energy, in BTUs, you are getting out of your propane and what you are paying for your kilowatt hours, and compare the two.

Alaska HomeWise articles promote home awareness for the Cold Climate Housing Research Center (CCHRC). If you have a question, e-mail us at akhomewise@cchrc.org. You can also call the CCHRC at (907) 457-3454.

The following workshops will be held from 6-8 pm at the Cold Climate Housing Research Center, 1000 Fairbanks Street, near West Valley High School and the University of Alaska Fairbanks. Call 907-457-3454 for directions.

February 1, 2010: Building Science Basics

February 2, 2010: Air Tightness

February 3, 2010: Ice Dams

February 4, 2010: Lighting & Appliances

February 8, 2010: Heating & Hot Water

February 9, 2010: Doors & Windows

February 10, 2010: Insulation

February 11, 2010: Ventilation

You can get $1,500 or more in tax credits for these home fixes — if you do the work in 2010. So make these your new year’s resolutions.

Click here to read more.

By CCHRC Staff

The “Ask a Builder” series is dedicated to answering some of the many questions Fairbanks residents have about building, energy, and the many other parts of home life.

Q: What is a heat pump and can it work in Fairbanks?

A heat pump is a mechanical system that uses a series of liquidfilled pipes or tubes run underground to heat (or cool) a building. The liquid captures the ground heat and uses it to heat your home. You might think our Fairbanks ground would be too cold to support such a system, but even at lower temperatures a heat pump can still function appropriately. In Alaska, this tubing has antifreeze added.

In Fairbanks, these tubes need to be buried below the frostline (about 10 to 12 feet down) where the temperatures are fairly stable across the seasons. Heat pumps use more electricity than the typical house, but the increased costs are offset by the savings in fuel. There is some concern that, depending on your site, the heat pump will take enough heat from the ground to cause freezing, however more research needs to be done on this question. Locally, we’ll probably see more of these systems being installed in the next few years, but for now, it is an emerging technology for our area.

Q: My boiler needs to be cleaned. Is that something I can do myself, or should I call a professional?

You can do it yourself but it is a messy and sometimes difficult job. Older boilers may require removing side shields, top pieces, gaskets or other parts that can be damaged and cause leakage.

Most newer boilers have hinges and open from the front, making them much easier to clean. These boilers make it simple to get a brush onto the heat exchange surfaces and leave few places to gather soot. In the long run, it is probably best to have a professional do the cleaning.

Q: If I want to build a higher tech home and add some solar panels or wind power, how does orientation play into that?

Fairbanks is a tough place for wind power because it is generally a calm region of the state. The orientation of your home will not be a hindrance to adding any type of wind system as long as you have the wind resource. High areas in the hills around Fairbanks have the best potential for this kind of renewable energy system. Fairbanks is certainly a good place for solar much of the year. Solar systems should be oriented to the south in order to catch as much light as possible.

If you are building a new home, orienting it as much as possible toward the south will be advantageous for any kind of solar energy collection, whether passive or panels.

If you want to add solar panels on to your house, place them on your roof or outside walls at the height they will collect the most light.

Before making any decisions it is best to contact a solar installation company that can do an assessment of your property. These companies can do an analysis that will tell you where panels will receive the most sun exposure year round.

Alaska HomeWise articles promote home awareness for the Cold Climate Housing Research Center (CCHRC). If you have a question, e-mail us at mailto:akhomewise@cchrc.org. You can also call the CCHRC at (907) 457-3454.

BASF Wall Systems recently announced the results of an Eco-Efficiency Analysis comparing brick, stucco and Senergy® Exterior Insulation and Finish Systems (EIFS). The analysis was designed to determine the balance of environmental burden and life cycle costs associated with the construction, use and disposal of exterior wall claddings in the United States. Though the study was geared towards commercial buildings, the findings still prove interesting.

Click here to read more.

A statewide weatherization program with the potential of reducing energy costs in thousands of Alaskan residences will improve some 1,740 homes in 2009 alone, and Alaska Housing Finance Corp. expects to more than quadruple that number by 2011. The goal is to weatherize 4,000 homes in 2010 and 7,500 homes in 2011, said Bryan Butcher, public affairs director for the state agency, whose mission is to provide Alaskans with quality affordable housing.

“We can show there are average savings of 25 percent on energy right now, and we are hoping it goes up,” Butcher said.

Click here to read the full story.