April 9 – Donaldson Run Passive House Update

Building is moving along!  Today we installed rigid foam at the band board and I-Joist cavities.   This insulation provides a thermal break between the floor joists and exterior, which is otherwise unachievable.

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March 23 2014 – Slab Prep Donaldson Run Passive House

  SLAB PREP at Donaldson Run Passive House. 6" 60 PSI foam, termite treated, 2" foam at slab edge, 15mil stego vapor barrier, Stego tape all seam and penetrations, lap barrier 2 feet over wall at walkout, 2 feet up wall for remainin

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March 2014

SLAB PREP We are using 6" of 60 and 40 PSI termite treated foam under the slab of our passive house with a 2" rim to separate the slab from the walls.  This is a test piece we are using to level the site and shoot our lines.  We will do full

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February 2014

Patty Will be working with Arlington County Television to film a series of how-to videos on Passive House construction and the Arlington Green Home Choice Program.  Click here to see more about the Arlington Green Home Choice program.

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January 2014

Metro Green finally broke ground on the Donaldson Run Passive House in North Arlington.  After several setbacks, including some poor soil conditions, we finally broke ground in January.  Read more about Donaldson Run

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Summer 2013

We celebrated the completion of Northern Virginia’s first Bright Built home.  The right sized super insulated home was completed in July in Pimmit Hills, an inside the beltway neighborhood near Pimmit Hills.  At just over 2,000 square feet, the h

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Fall 2013

Metro Green broke ground on the Pimmit Hills Tower House.  This very cool house, designed by a local architect, will be “greened” up to include 2” of exterior rigid insulation, a inverter based multi-split and ERV HVAC system, and radiant floo

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December 2013

The Pimmit Hills Tower House is now framed and weathered in. Windows come in early January and we are shooting for a finish move in date for May 2014. See more in Photo Gallery

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The ducted mini split – the answer for floors

The concealed ducted mini split allows one mini split unit to manage 3 to 4 separate spaces. As long as the duct runs aren’t too long, two units can serve an entire floor

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Water Runoff – retention ponds and rain gardens

Residential retention ponds are sophisticated rain gardens and operate to slow down runoff from large footprint homes. These systems, popularized more than a decade ago are facing criticism recently. Many homeowners, not understanding the maintenance

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Radiant heat in Virginia – is it worth the cost

Metro Green is working with two HVAC companies to design an integrated radiant hybrid systems for a new home in Northern Virginia. Radiant is considered a luxury in the mid-Atlantic where humidity requires an air sourced dehumidification system of so

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Insulating basement walls

If you are thinking about insulating your basement walls you might want to read some recent building science articles on the subject. There has been a running discussing on moisture infiltration. Insulating and air sealing  your wall will go a long

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