’s “This Week in Review” on GreenroofsTV: April 29th, 2011

April 30, 2011 at 2:53 pm

Each week you can expect to learn What’s New here on through our “This Week in Review” video.   Here’s the transcript for April 29, 2011 from our daughter,  Anjuli –  click on the photo below to see the video, or  here.   Enjoy!

–   Hello, I’m Anjuli Velazquez and welcome to This Week in Review for April 29th, 2011,  on  GreenroofsTV.

–  Project of the Week

– Our project of the week is the  U.S. Tax Court greenroof built in 2008 in Washington, D.C.  The D.C. area is well known for having some of the worst storm water control problems in America and the Federal Government along with the District Government authorities have recognized that greening its rooftops is the most practical and economical means of addressing this issue.  The United States Tax Court, one of a number of notable General Services Administration’s greening projects, was recently re-roofed with a Barrett Company 4 inch extensive “Greenroof-Roofscapes ®” assembly, adding to the growing federal green roof inventory within the Capitol District.  The green roof initiative is reducing the storm water runoff volume while providing the many other environmental contributions that living roofs are known to provide.  Cole Roofing was brought in as Barrett Company’s Greenroof-Roofscape ® installer, who then hired Greg Long of Capitol Greenroofs to oversee installation and maintain the roof.

– To learn more about the U.S. Tax Court greenroof, click on our project of the week photo on our  homepage.

–   “What’s New“

–  Chris Wark, our Energy Editor, wraps up his final installment of his 7-part “Cooler Than Cool Roofs: How Heat Doesn’t Move Through a Green Roof” Energy series. Make sure to read “The Secret and How To Use It.

–  Did you know you can watch YouTube videos, like our latest Sky Gardens ~ Greenroofs of the World episode, the Cook+Fox Architects Office, on your DirecTV?  Just click on the link on our homepage or go to the greenroofsTV page and follow the directions.

–  Our April 2011 e-Newsletter is out, so catch up on all of the greenroof and wall news from this past month.

–  Don’t forget: our 2011″Love the Earth, Plant a Roof!” Earth Day Photo Contest has been extended until today, so go to our  Facebook page, submit your photos and vote for your favorite until midnight tonight and the winner will be announced tomorrow!

–  Read Linda’s latest Sky Gardens Blog posts: “GPW: U.S. Tax Court“ and “’s “˜This Week in Review’ on GreenroofsTV: 4.22.11,” and Christine Thuring‘s “See the UK Green Roof Student Conference Programme & Register by 6th May 2011.”

–   “Upcoming Events“

–  April 29th-May 8th: is the WMG Water Harvesting Certification in Tucson, AZ.

–  May 2nd: is the 2nd Annual Massachusetts Sustainable Economy Conference in Boston, MA.

–  and May 4th-6th: is Greenbuilding – International Exhibition & Conference on Energy Efficiency & Sustainable Architecture in Verona, Italy. For more Upcoming Events visit our homepage.

–   “In the News“

–  Tanya Snyder of Streetsblog Capitol Hill Blog talks about “Philadelphia’s Battle Against Impervious Asphalt.”  She says, “In Philadelphia, your water bill used to be based only on your water consumption…now, your bill is a more accurate reflection of your water footprint, including the amount it costs the city to manage stormwater runoff from your property.”  Philadelphia is now the number-two city in the country for green roofs.  And they’re also implementing a multitude of public space improvements that are popular and desirable in urban cities for many other reasons besides stormwater management.

–  Kim North Shine of Metromode Media reports on “Metro Detroit’s Institutes of Greener Learning.”  The students of Lawrence Technological University in Southfield use its green roofs, rainwater collection systems, solar panels and other eco-minded facilities, like the Alfred A. Taubman Student Services Center, as living laboratories.  The student center was built with recyclable materials and has 120 geothermal wells that heat and cool the building as well as a 10,000 square foot green roof that controls and reduces water runoff.

–   To learn more about these stories and new ones posted daily, go to our  In the News or  newslinks section of our website.

–   Have something you think we should know about and post on our website?   You can send us your green articles, videos and images to

–   Stay up-to-date with what’s going on at by subscribing to our  greenroofsTV channel on YouTube, following us on  Twitter, liking us on  Facebook and being a member of our network on  LinkedIn.

–   This has been This Week in Review for April 29th, 2011 on GreenroofsTV.  I’m Anjuli Velazquez and I’ll see you next week!

*This week’s episode is sponsored by  The Greenroof Directory, brought to you by*

Did we miss something?   We’d love to hear from you!

~ Linda V.



GPW: U.S. Tax Court

April 27, 2011 at 10:58 pm Project of the Week: 4/25/11
U.S. Tax Court
Washington, DC, USA
5,500 sf. Greenroof

Year: 2008
Owner: U.S. General Services Administration
Location: Washington, DC, USA
Building Type: Municipal/Government
Type:  Extensive
Single Source Provider
Size: 5,500 sq.ft.  
Slope: 1%
Access: Inaccessible, Private

Project Description & Details

The United States Tax Court, one of a number of notable General Services Administration’s greening projects, was recently reroofed with a Barrett Company extensive assembly, adding to the growing federal green roof inventory within the Capitol District.  The green roof initiative is reducing the storm water runoff volume while providing the many other environmental contributions that green roofs are known to provide including increased roofing longevity, carbon dioxide-oxygen exchange, reduced interior noise pollution and reduction of the urban heat-island effect.

The project actually has two wings with three green roofs totaling 5,500 sf of vegetated area: two green roofs on the north wing and one on the south wing.  Two succulent plugs per sf were planted including Sedum album; Sedum spurium ‘Fuldaglut’; Sedum kamtschaticum; Sedum sexangulare; Sedum reflexum ‘Blue Spruce’; Delosperma nubigenum, and Sedum rupestre “˜Angelina’.  An erosion control mat was placed on top of the extensive growing media.  Not publicly accessible, the U.S. Tax Court’s Greenroof-Roofscapes ® provides a visual delight to its high-rise neighbors.

Designers/Manufacturers of Record

Waterproofing & Greenroof System: Barrett Ram-Tough 250DM -“Greenroof-Roofscape ®” Extensive Green Roof
Architect: MTFA Architecture, Inc.
Waterproofing & Greenroof-Roofscape ® Installer: Cole Roofing Company, Inc.
Greenroof Installation Management & Maintenance: Greg Long, Capitol Greenroofs

Although the square footage for the vegetated area is 5,500 sf, Barrett Company provided a total area of 21,300 for the hot fluid applied roofing area.  Cole Roofing was brought in as Barrett Company’s Greenroof-Roofscape ® Installer.

Here are some photos of the December, 2008 installation:

As you can see from these photos a gravel bucket was hoisted to the roof and fall protection fencing was set up around the receiving area.  The growing medium was compacted using a 200 lbs. rolling drum, and 2″x10″ boards were used to screed it to ensure proper depth.  Then the growing medium was saturated and compacted to reduce wind erosion.  And finally, an erosion control mat completed the plantings.

Here’s what the roof looked like right after, in December 2008 and then the following season in late April and May, 2009:

Remember that planning in a busy downtown district can be tricky, but extremely important for all of the material material providers on a project.  Greg Long, seen below, says:

“Staging the materials is often the most difficult part of the project and minimizing the amount of times that you move material often determines whether a project will be profitable. “

It sounds like everyone is pleased with the way the project has fared.  Referring to Tim Barrett and Greg Long of Capitol Greenroofs, Bill Cole of Cole Roofing says:

“Greg and Tim have been great.  We hired Greg to oversee our men during the installation and then continue the maintenance.  He has done an excellent job.”

Did we miss something?  We’d love to hear from you!  Click  here to see more information about this project in  The International Greenroof & Greenwall Projects Database.  See how you can submit yours  here.

Love the Earth, Plant a Roof!

~ Linda V.