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Here is a view of the roof decks with the green roof finished.  Count down to listing day has started.

We are happy to announce that Ballard Aperture achieved a blower door test rating of 2.5 Air Changes per Hour which is well below the Northwest Energy Star Standards.  Along with other requirements such as High efficiency lighting, High efficiency Heating and Cooling and High efficiency appliances such as the dishwasher and water heaters the project has officially been Energy Star Certified!

For more detailed information on Blower Door standards see this article here.  You can also find out more information on the Northwest Energy Star's website here.

We have also met the requirement for 5-Star Build Green (approved by our certifier at Green Dog) and are awaiting the official news any day.

Here are a few shots of the test under way...

For Hot Water we chose to use Energy Star Certified Heat Pump Water Heaters.  Where the most efficient electric water heaters have an efficiency factor of around .92, Water Pump Heaters have a factor of around 2.3 which translates into using 62% less energy.  For more information you can visit the Energy Star website here.

Houzz: Best of Remodeling 2013 - Seattle (Living)

We wanted to share some of the sustainable materials we've been using on our current project - Ballard Aperture.

The latest images of the completed siding on Ballard Aperture.

We're getting excited to see the completion of the Badger Mountain Residence.  Here are a few preview shots of the house getting close to completion.

In order to maximize the quality of air inside the home we have applied a 4 part scheme.  1st is Air Sealing (See previous post "Air Sealing - What's the Big Deal").  The 2nd is the implementation of ERV's (Energy Recovery Ventilation) units.  These units control the natural ventilation by preconditioning the incoming outside air.  During times of warmer weather they dehumidified and cool the air and in cooler conditions warms up the outside air before distributing the naturally ventilated outside air inside the units.  These systems are one of the most effective ways to reduce the use of energy while keeping the relative humidity at optimal levels.

The 3rd part of the scheme is the use of Ductless (Mini-Split) Heat pumps for heating AND COOLING.  They have many advantages over traditional forced air systems.  First and foremost, they are up to 3 times more efficient than the most efficient furnaces on the market, and do not lose any of their energy through "duct-losses".  Also with no ducts you won't have the build up of dust and dander in a duct system subsequently being pushed though out the house dramatically reducing the spread of allergens etc... They also come with head units that are individually controlled with thermostats and remotes that allow for zoning.  

The 4th part of the scheme is the use of low VOC paints, stains and materials.  More on that in later posts...

See images of the ERVs and Ductless Heat Pumps installed in Ballard Aperture.

Here are a couple of sneak peek shots of the kitchens and stairs at Ballard Aperture.  

On Ballard Aperture we chose to go with BIBS Insulation (Blown In Blanket).  The process starts with the insulators applying netting over the studs creating an enclosed box within each stud bay.  The next step is applying a hose in the netting and filling the stud bay with insulation.  The advantage of this process over traditional insulations is 1. The small particles of insulation fill all possible space within the wall 2. The insulation will not settle over time 3. We get a higher-than-code insulation value of R-23. Additionally, the insulation we chose is formaldehyde free.  In locations where blown-in was not feasible, such as the trussed roof and for the sound insulation between units, we used EcoBatt.

Below are a few close up shots of the wood installed on Ballard Aperture.  We're extremely happy with the results!

The Kirkland Residence was featured on Houzz again! Check it out here.

Lever Homes was feature in Houzz!

We wanted to share the process and product for treating the wood siding on Ballard Aperture.  Most stain products last from 1-5 years depending on the transparency level and penetrating quality of the stain (usually less in the northwest).  For this project we used LifeTime Wood Treatment (click on the name for more info).  The best part besides being low-toxic is it will never require any maintenance for the life of the wood.  That means no fading or re-staining... EVER!

Framing is complete on Ballard Aperture... Check out a few photos on this beautiful day!

The Lever Homes was recently selected as the project of the month for August in the Seattle Daily Journal of Commerce. Click here for a link to the article. 

Thanks again to all those who helped make that project possible!

On the Ballard Aperture project we have doubled our efforts to reduce unwanted air infiltration into the building. This is an issue that has flown beneath the mainstream radar for years, despite the fact that energy gurus have been talking about it for years. Now that the Washington State Energy Code requires blower door tests for every residence, envelope performance is now on the minds of more builders and is conveniently quantifiable. The results of the test produce a simple number -- how many times the volume of air inside the entire building is completely replaced within one hour at a given pressure. I could write pages about this but I don't need to -- you can read more about the test here and here and watch a video of a test here. 

Simply put, buidlings breathe (even with all of the windows and doors closed) more than most people realize. There are two problems with this: Energy Loss and Lowered Indoor Air Quality

Energy Loss: Outdoor Air temperature in this area is usually cooler than what's comfortable inside, so your heating system is having to work harder to heat all of this air leaking to the inside. Blower door tests performed on a typical home in Americana tell us that if you add all of opening areas of the cracks and crevises together, it would be like leaving a window or two wide open in your home - something you would never do in January.

Indoor Air Quality: If we had a choice, we'd rather not breathe air filtered through our garage, attic, or walls every second we are inside our home.  In larger buildings, severe cases of low indoor air quality are labeled Sick Building Syndrome.

How to Fix it: 1: Build a tight envelope and 2: install an HRV or ERV (a sophisticated filtration system which we have installed in this project and will blog about soon). The next post will show the measures we are taking to try and build the tightest envelope we can. 

The Greenlake residence we designed was hand-picked by the editors at Houzz.com as an example of a home with Craftsman detailing. Check it out here, fifth in the sequence. You can read the article here.

We are now framed up to the roof decks.  Here is a shot of Ballard and the Olympic mountains beyond.  We'll be done with principle framing this week so stay tuned for a post coming soon.

A few shots from our Ballard Aperture project getting started!