Wednesday, December 28, 2011

TINY HOMES, Simple Shelter

Our Crystal River Treehouse is featured with two full two-page spreads in Lloyd Kahn's new book:

"Tiny Homes, Simple Shelter, scaling back in the 21st Century."

Pre-order now, available Jan 31, 2012.

(Lloyd published "Shelter" in 1973 and has continued to publish inexpensive books about unique, earth-friendly home designs ever since...)

Wednesday, November 2, 2011

AIA Colorado - Where to find the right architect...

Designing and building a home is one the largest, riskiest endeavors a family will enter into.   Don't take a chance on hiring an architect who may not be qualified!  The AIA Colorado web site is the best place to go to find registered architects in Colorado.  It is set up so that you can search by almost any criterion: from sustainable design to furniture, commercial to residential, and affordable to high-end.

Photo from AIA web site - Asan Institute for Policy Studies by iArc, reknowned Korean architecture firm.

Thursday, September 8, 2011

Stillwater Affordable Housing Project - Pitkin County, Colorado

Years back, Green Line Principal, Steve Novy, was project architect on an affordable housing project on the outskirts of Aspen.  It was part of a subdivision created by the legendary architect Fritz Benedict.  He and his wife Fabby dedicated a sizable portion of land, right along the Roaring Fork River east of Aspen, to affordable housing.
Perspective Rendering of Neighborhood

The county wanted to create comfortable, aesthetically appropriate homes that were energy-efficient, environmentally sensitive, and healthy - with clean indoor air.  We established a program that included 17 units, a mix of 1, 2, and 3-bedroom layouts.  
One of the wealthy neighbors objected to the project, and held County to the letter of the law with regard to a "natural materials setback."  There was a setback in which only natural materials were allowed.  We didn't see this as a problem, since we were using all natural materials.  Or, so we thought.  It was argued that the composite roofing is not natural, and the only truly natural roofing material that could be used was slate tiles!  (not exactly an appropriate material for an affordable housing project)
Site Plan - showing 17 units

The project was built...   at 13 units, and it has gotten rave reviews.
In fact, it was reported in todays' Aspen Daily News that Pitkin County commissioners will be using this project as a model for new affordable housing projects they will be building in the near future.  Aspen Daily News Article.

Here's what they said:
"The commissioners agreed that the ideal investment would be to buy land and then build new housing on it, modeled after the county’s 13-unit Stillwater project east of Aspen."
Duplex West Elevation

Friday, August 12, 2011

Pitkin County First to Require Neighbor Review of Solar Panels

Getting a building permit in Pitkin County has just gotten more complicated.   Pitkin County now requires neighbor review of solar panel installations larger than 200 square feet.
The bureaucracy grows...   For us architects, it is both a blessing and a curse.  A blessing in that the myriad of codes and regulations does in fact provide us with more work, but a curse in that it slows down, and in many cases jeopardizes our projects.

Pitkin County First to Require Neighbor Review of Solar Panels - Aspen Daily News Article

Friday, July 22, 2011

So, its healthy and fun in the Roaring Fork Valley?

Here is an article from the Post Independent today.
Glenwood Springs will be featured as the Most Fun Town in the US for Rand McNally's 2013 road map.

I keep telling you all to move out this way!!

Go by the Gear Exchange and tell them you're looking for a good time!

Thursday, July 7, 2011

Colorado mountain living adds years to your life!

It would make sense that people who live in healthy environments and who live a healthy lifestyle would live longer, and this study from the University of Washington helps to confirm that suspicion.  Living a healthy mountain lifestyle truly adds years to your life! 

For those who are considering a move or a lifestyle change, it would seem an obvious choice to buy or build a home in one of our mountain communities, stay active and buy some time!

Carbondale, Colorado is probably the best choice.  Not technically in Pitkin County, but just as healthy, maybe healthier!  Just come by and check it out.  You'll see.

LINK to Denver post article.


Green Line Architects specializes in healthy, efficient, new home designs, additions and remodels.  Call for a free consultation.

Thursday, June 30, 2011

What does an architect do?

Here is a great diagram showing the entire design process.  Take a look.  The items in blue are fairly well understood, but maybe not the rest!

For example, have you considered having your architect accompany you to view potential building sites or existing homes?  If not, maybe you should consider it.  Who better than an architect to help you evaluate a piece of property before you buy it!  Most architects will do it for free, in the interest of getting their clients the best possible building site, and in the interest of getting the design work!

Post-Construction Evaluation! - Now, that's one of the most important ones, and we haven't been hearing about it much.  Knowing whether you've got a functional building and that the owner is satisfied are terribly important points.  Don't you think!?

Monday, June 27, 2011

Green Line Architects in the Press

Here is a nice business brief that was published in the "Inside Business" section of both the Aspen Times and Glenwood Post Independent:

Wednesday, June 1, 2011

Green Line Architects Team completes Net-Zero Energy (NZE) Home in Lenado, CO

A small home with optimal efficiency, a LEED-H Gold rating, and -5 HERS Index!

Southeast view of Master Bedroom

Entry View toward Kitchen
Master Bath Vanity

Master Bath - Custom Stainless Steel Japanese Soaking Tub
South View showing Solar Hot Water Panel Array
Southwest View of Living Room

 (Carbondale, CO) -- The Green Line Architects team has achieved the Holy Grail of energy-efficient home design: a small, off-grid home in Lenado, CO with Net-Zero Energy (NZE) use.  An NZE home produces the same amount of energy it uses on a yearly basis.  At only 2000 square feet, this home represents an efficiency of scale that could help to shape the future of the American home.
               "NZE consumption for homes in our cold climate is a lofty goal, and we've finally done it." said Steve Novy, Green Line’s principal.  "In fact, this home is situated at 8600 feet in elevation where there are only 4 and a half hours of sun per day in the dead of winter."
View of Living Room and Tulikivi Wood Stove
               The home was built for Branden Cohen of True Nature Healing Arts who bought the property at the top of Woody Creek from "Lumber Jack" Hogue.   "I came to Steve with an vision for a beautiful, ultra-efficient, off-grid home.  I had been living off the grid for some time in Jack's old cabin, which I renovated and maintained.  So, I knew exactly what needed improvement," said Cohen. Novy assembled a team of experts to address this unique design challenge: an optimized, high-performance, off-grid home.  
               The team met in several charrette sessions to design the home.  Cohen asked the team to move the house up the hill, where it could get more sun.  The solar hot water system was taken off the roof in the new design for easier access and maintenance.  It was Cohen's desire to make all of the home's systems more reliable and more efficient; and to make living off the grid a little more comfortable.  For example, because the bathhouse had been separate from Lumber Jack’s cabin, Cohen requested that the bathroom be put inside the new home.
               Re-use and recycling have become important considerations in green building design, and none more so than in this home.  Many of the materials from Lumber Jack's original cabin, bathhouse and garage were deconstructed for use in the construction of the new home, such as the cotton insulation, bronze door hardware and exterior compact fluorescent (CFL) lighting fixtures, to name just a few.  
               The majority of the wood materials in the home is Forest Stewardship Council certified or "FSC" wood.  The FSC certification shows that the wood was produced from responsibly managed forests.  
               All of the finishes are low toxicity and natural products.  Structural Insulated Panels (SIPs) were used, which are delivered on-site pre-cut.  This dramatically reduces the waste on the site.  "This is the lowest waste home we have seen," said Megan Gilman from Active Energies, the project energy consultant.
               Gilman emphasized the importance of energy performance in building design.  "Lowering energy consumption is the most important design consideration in new homes.  The long-term impacts of this exercise are great, so get the energy equation right!" she said.  The home has received a HERS Index of -5. (minus 5).  That means that it is 105% more efficient than a standard home.
               Although the Residential Energy Services Network (RESNET) has only recently started to track HERS index scoring, but it is believed that there is only one other home in the state with a lower Home Energy Rating System (HERS) index than the Cohen home. 
               The HERS Index, also known as the EnergySmart Home Scale by the US Department of Energy’s Building Technologies Program, shows the energy efficiency of the home.  For example, a score of 100 is a code-compliant home, based on the 2006 International Energy Conservation Code; a score of 50 would be a home that is 50% more energy-efficient than the baseline home; a score of zero is considered a Net-Zero Home, one that produces the same amount of energy on a net yearly basis as it uses.   The home is also registered with the U.S. Green Building Council’s LEED for Homes program and anticipated to receive a LEED-H Gold rating.
               The use of SIPs allows for a very high level of continuous insulation, which makes all the difference in the Cohen. The walls are R-40 and the roof is R-60.  The insulation, combined with extremely low air infiltration -- 0.10 natural air changes per hour -- makes for an ideal building "shell."  According to most architects, getting the shell designed and built properly is the most critical part of the entire design and construction process.  "Once the shell is super-insulated and airtight, that's when we start thinking about the other systems," said Dennis Powell, former project manager at Green Line Architects.  
               Modern building science is at the heart of these new super-homes.  "We have learned from the best," said Novy of his experience working with Joe Lstiburek and Betsy Pettit, FAIA of Building Science Corporation.   "Joe and Betsy always remind us of the simple things, like the mantra: 'You cannot make a building too airtight, you can only under-ventilate it.'"  
               With that advice in mind, Dave Houghton and August Hasz of Resource Engineering Group incorporated two Heat Recovery Ventilator units (HRV's) into the home design that provide heat exchange, ventilation, and filtration.  More than just an air delivery system, the heat exchange component allows cold outside air that is being brought in to be heated by the warm, stale air that is being exhausted.  "Although this house is literally built like a refrigerator, you could leave the house for months, and come back to a home that will smell fresh and clean," said Houghton.
               Houghton and Hasz also designed the extremely efficient solar thermal system, which uses eight large solar hot water panels and interfaces seamlessly with the high-efficiency boiler.  On the structural side of the design, the two contributed greatly to reducing the material use in the home by “right-sizing” all of the structural members.
               Windows are a key shell component when going for great energy performance.  Here, the team chose triple-pane windows with a very high insulation value -- a U-Value of 0.117 and R-Value of 8.54.  Keeping in mind that the rest of the wall is R-40, Novy reminds us that an R-Value of 8.54 window still has less than ¼ the insulation value of the wall.  "Windows are where we are seeing some of the fastest technological developments.  In fact, just a few years after we specified this glazing, we have new products available that have twice the insulation value,"  Novy said.
               The GLA Team also took advantage of the newest available lighting products by incorporating LED-compatible fixtures into the home design.  Aaron Humphrey, of Alpenglow, Inc., the lighting design firm, has only good things to say about LEDs.  "The low electricity demands, paired with excellent light quality, make LEDs an obvious choice," extolled Humphrey.  Over 90 percent of the light fixtures in the Cohen home are LEDs, and the remainder are compact and linear fluorescents, which creates a very low electricity demand: an extremely low 1 watt per square foot!
               As with most off-grid homes, renewable energy systems provide the primary heat and electricity for this home.  An array of eight 4 foot x 10 foot solar hot water panels provides space heating and heating for domestic water. These are paired with a storage tank, and a high-efficiency boiler as backup.  "Having redundancy of systems is absolutely necessary in this type of off-grid setting," said Novy.
               The photovoltaic (PV) system provides all of the necessary electricity, except for extended periods of clouds, rain or snow.  For these times, there is a back-up generator.  One aspect of the PV arrays that distinguishes this home from others is the tracking function.  "The trackers allow the PV panels to follow the sun throughout the course of the day," explained Novy.   "They increase the efficiency of the PV arrays by roughly 25 percent."  Cohen had used two existing PV arrays on trackers successfully while living in the cabin, so another array on a tracker was added for the new house.
               Building integration of renewable systems is the buzzword these days in the design community.  Architects are tasked with making the solar panels and other renewable systems a part of the design of the home, not an afterthought.  Unfortunately, many of the solar homes and earth ships of the 1960’s and 1970's created something of a stigma for solar homes.  Since then, architects have made great efforts to erode that stigma.  There has been a strong movement to design aesthetically pleasing green homes that fit into their surroundings.    Green Line Architects set out with that intent: to design a home that fit into the rustic character of the historic mining and logging town of Lenado.  "We tried about 20 different roof designs before we got it right.  The design had to be fairly simple and work well with all of the historic homes and sheds in the area," said Novy. 
               The aesthetic is that of a finely detailed mountain cabin.  The interior finishes are durable and beautiful.  The slab black walnut benches, and door and window finishes were designed and crafted by local furniture maker David Rasmussen of David Rasmussen Design.  Laura Bartells, of GreenWeaver, Inc., a local straw-bale and plaster expert, worked up 20 to 30 plaster samples before the color was selected. She installed a dark, almost chocolate-colored natural earthen clay plaster on much of the interior walls.
               As with most of the Woody Creek area, there is a good story that goes with the location of the Cohen home.   Jack Hogue, also know as "Lumber Jack," was rumored to be a cranky mountain man who always carried a gun.  Hogue squatted on this piece of land at the top of Woody Creek for 17 years, built a cabin and a bathhouse there, and in the 90s finally received title to it through adverse possession (essentially squatting on it for 17 years).  
               Finally, Novy, who has a degree from the University of Colorado, College of Environmental Design, suggests that there is always more to learn in the creation of efficient buildings.  This year, the 5th semi-annual Solar Decathlon competition will be in Washington, DC where university teams compete to design and build ultra-efficient small homes.  The CU Team won the first two of these competitions in 2002 and 2005.  Novy attended in 2005 and came away with a wealth of knowledge, inspiration and creative energy to design even better, small homes.  His hope is that the Cohen Net-Zero Energy home will inspire architects, builders and homeowners to strive for the next level of efficiency in home design, and use this home as a model for creating high-quality high performance housing in the US and beyond.  "If we were to start producing this kind of home in a factory, as an engineered product like we do with automobiles, we would see even better, more reliable home designs and get even higher energy performance," Novy forecasted.  "This is how I would like to see our good old American ingenuity put to its best use, toward beautiful buildings that help create a secure energy future."

Green Line Architects – Beautiful, Sustainable, Functional Architecture

For more information about NZE homes, contact Steve Novy at Green Line Architects: 970-963-6689,,  

Basic Info:
•Main messages: This is a product of good old American Ingenuity!  (Let's help ourselves by promoting the construction of this type of home in the future)
•Off-the-Grid, Net-Zero Energy home at 8650 feet in elevation, in Lenado, CO where there are only 4 and a half hours of sun per day in the dead of winter.  HERS Index score of Minus 5: a score of 100 is a code-compliant home; a score of 50 would be a home that is 50 percent more energy-efficient than the baseline code-compliant home; a score of zero is considered a Net-Zero Home, one that produces the same amount of energy on a net yearly basis as it uses.  The Cohen home is one of the most energy-efficient homes in the state, and on target to receive LEED-H Gold certification.
•The Cohen home is a great example of a small home - only 2000 square feet, smaller than the average American home.
•Located in Lenado, above Woody Creek in local favorite, George Stranahan's territory, and up the road from the old haunts of Hunter S. Thompson, the land was bought from Jack Hogue, aka "Lumber Jack" who was extremely cranky and who always carried a gun.  Hogue got title to the land from squatting on it (adverse possession) for 17 years.
•Low-waste design, limits burdens of hauling from remote site, and limits burdens on landfills.
•The Cohen home is built in the Colorado cabin vernacular style, old Lenado cabins and sheds were the inspiration.
•Much of the materials from "Lumber Jack's" existing cabin, bath house and garage were used in construction of the new home.
•Located only 5 minutes as the crow flies from Aspen,CO , but worlds apart.
•Constructed of Structural Insulated Panels, or SIPs, which create an extremely tight building shell with very little air infiltration.  Literally, built like a refrigerator.
•The home utilizes a solar hot water system and solar electric system for power with a back-up generator for long periods of cloudy days.
•95 percent of the lighting uses LEDs, the best new technology with great light quality and very low energy consumption.
•High-performance window glazing – Center of glazing U-value of 0.117 (R-Value of 8.54)
•Re-used, natural, recycled, and local materials were used including Forest Stewardship Council certified or "FSC" wood was used throughout the project.
•Interior plasterwork was done by Laura Bartels, of GreenWeaver, Inc.
•Unique, custom built-ins, furniture and wood finishes by David of David Rasmussen Design.

Owner - Branden Cohen and Deva Shantay, True Nature Healing Arts
Architect of Record- Steven A. Novy, AIA, Green Line Architects
Project Manager – Jeff Dahl (now with Carbondale Beerworks)
Project Manager - Dennis Powell (now with DK Architects)
Architectural Design / Furniture / Wood Finishes – David Rasmussen, David Rasmussen Design
Mechanical and Structural Engineers - Resource Engineering Group,
               Dave Houghton, PE and August Hasz, PE
Energy Consultant / Rater - Megan Gilman, Active Energies, Inc.
Photovoltaic Expert - Scott Ely, Sunsense Solar Electric and Renewable Energy
Solar Hot Water / HVAC Expert - Patrick Johnson, Solar Flair Thermal Systems, Inc.
Interior Plaster - Laura Bartells, GreenWeaver, Inc.
Lighting Consultant – Aaron Humphrey, Alpenglow Lighting Design, Inc.

Steven A. Novy, AIA
Green Line Architects
65 N. 4th St., Suite 5
Carbondale, CO
Tel.  970-963-6689
Fax. 970-963-0265

The High Life - Colorado Homes Magazine article on Crystal Treehouse

photo by Steve Novy

Hilary Oswald and the team at Colorado Homes and Lifestyles magazine did a great job on the photography and writing for this article on our Crystal River Treehouse.  Check it out!

The High Life

Thursday, April 21, 2011

Architecture Students Competing to Design/Build Tiny Solar Homes

Jeff Dahl and I attended the 2005 Solar Decathlon.  It has been one of the most exciting things going in residential design... super-small 600 sq. ft. homes, each one a jewel of creativity and efficiency.  The competition inspires truly beautiful, energy-efficient, eco-friendly designs.
This year, all of the teams' have prepared conceptual models and virtual walk-throughs, which are online prior to the event.  See link.
US Dept. Of Energy's Solar Decathlon

Friday, April 8, 2011

Make US Buildings Net-Zero Energy Buildings - Now, There's an Idea!

Green Line Architects' recently completed Net-Zero Energy Home in Lenado, CO!

Thursday, March 24, 2011

Americans are Largely Uninformed About Their Energy Sources

After the recent earthquake and tusnami in Japan, we are hearing a lot of talk about reconsidering our plans for new and exisitng nuclear power facilities.  Will we take this as a warning?
Will we use this as an example of the rationale for using renewable energy sources?
Cross your fingers...

No Nukes?  Really? - Shelton Group Article

Friday, March 4, 2011

WSJ Article

Join us for some high-performance home designs in the most expensive town in America!

Aspen, the Most Expensive Town in America

Not convinced?  The Sardy House was sold in 2006 for $16.25 million, its listed now for $23.5 million.

Friday, February 25, 2011

NREL Building seeks Net-Zero Status

LINK - Pushing the limits of net-zero energy building design.


This building in Golden is worth visiting...

Shouldn't every new building be Net-Zero?


Wednesday, January 12, 2011

Frost on Windows

This time of year in Colorado, when nighttime temperatures get down to 20 below zero, we get calls from people worried about frost on their windows.  The beautiful crystalline pattern of the frost is not appreciated when it thaws and drips onto the window sill, creating a problem for the homeowner.  This moisture can soak into a wood sill, degrading it and causing discoloration.  Eventually, if it keeps happening, there is the potential for mold growth.

Why does this frost occur?

Its all about dew point, the temperature for a given relative humidity at which airborne water vapor condenses on surfaces.  So, when the surface temperature of the interior pane of the window is below the dew point, condensation on the glass surface will occur.  The dew point depends on both temperature and relative humidity.

What can you do to avoid the frost?

1 - Use high-performance glass.
In snow country, we recommend using a high-performance glazing product like a triple-pane window.  The better the insulation value of the window, the higher the temperature of the interior glazing surface, and the less likely it will be to frost. 

2 - Use insulating shades appropriately.
Many of us are using insulating shades to increase the R-value of the window assembly, a good idea, but consider this:  Even though your insulating shades help keep the heat in the room, they also help keep the cold on the glass.  Unfortunately, since there is not a true air seal between the insulating shade and the glass, the shade allows moisture-laden air into that space.  There it will condense onto the glass surface, causing frost on those cold winter nights.  In order to keep from having frost on the window and subsequently water droplets on the sill, Mike Dollahan of Architectural Windows and Doors recommends keeping the insulating shades open at least 4" at the bottom.  This allows warm air from the interior to heat the glass surface so that it does not drop below the dew point.

3 - Watch your home's interior relative humidity.
In Colorado, an interior relative humidity of 25% to 35% is normal.  But if you are humidifying your home, or if you have a pool or hot tub inside, relative humidity levels will go up.  As they go up, the chance for frost on the windows goes up, too.  (you may want to buy a hygrometer to keep tabs on those humidity levels!)

4 - Use fiberglass or vinyl windows.  The frames of these windows are typically better insulated than wood-framed windows, and they won't discolor or become saturated when the frost thaws and drips on them.   Fiberglass windows are considered to be the best choice for overall performance and longevity.  The process of making fiberglass is not too impactful; and its made from a very abundant resource, ...sand!