Hi everyone,

Since I know we have a lot of talented people in this group, I'd like to reach out to those of you based in Los Angeles and see if anyone is interested in talking at an upcoming Living Building Challenge collaborative event.  The topic of the meeting is "Selecting Healthy Materials 101: From the perspectives of... Read more

I was wondering if any design or contractor friend here can kindly share the carbon emission factor of excavation during construction. 

I found a paper that provides energy use rate per cubic meter and associated carbon emission in kgCO2 for different phase of construction such as excavation earth work, pouring and lifting concrete,... Read more

Hi Shane and Dennis,

What return address should we use for BIT User forum notification emails?  Ben suggests something like no-reply@bit-user.org but whatever you like is fine.

Once you decide, please let us know who controls the domain name (e.g. bit-user.org or bitbuilding.org).  Ben will send them instructions for editing the... Read more

We're looking to expand our design performance group - let Peter or me know if you have someone to recommend to us! Here's the description. 

Thank you to everyone who signed on to the Materials Pledge letter.  It was officially released on April 15th with 56 signatory firms.  The Materials Pledge will soon have a new home online and a way to continuously add more signatory firms.  I'm keeping a list for now and there are already four more firms who want to join.  I will let everyone... Read more

Hello Sustainability Leaders,

Great to see some of you at Greenbuild last week.  Thanks to all who responded to Nadav’s post-election blues post.  Lots of helpful insights and sentiments that left me very grateful to be part of this community.  On a related note, since the election I’ve been asked by people in our office and in life if... Read more

Older buildings—especially those from the 1950s, ’60s, and ’70s—need our help. Many leave something to be desired in terms of aesthetics and comfort. But the truth is that they are part of the urban and suburban fabric now, and they aren’t going anywhere. As tempting as it might seem to tear them all down and replace them with high-performance... Read more

Hello Green Gurus,

Here is the information for October's Peer Networks Webinar, How to use the Building Environmental Justice Tool for your next project. We hope you will join us!

Register HERE

How to use the Building Environmental Justice Tool for your next project
Monday, October 24, 2022
2 - 3pm ET (11am -... Read more

Welcome to the quiz portion of Introducing Fitwel v2.1!

Learning Objectives
Upon completing this course, participants will be able to:


1.  Explain the purpose of the Fitwel standard, including how it advances the goals of health and well-being of building occupants—as well as public health.

2. List nine ways in... Read more

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Greetings, Green Gurus!  As many of you know, I teach a course at the University of Pennsylvania's Graduate School of Architecture, and one of my former students has just graduated from their and MS in Design - Environmental Building Design program.  She is looking for employment at a firm that has a focus on sustainability.  Unfortunately we... Read more

Has anyone had any success with achieving the LEED Building Envelope commissioning points with an alternative compliance path using the requirements of the PHIUS verifier? It seems like an unnecessary duplication to ask the client to pay for a BECx agent and a Passive House verifier. Or am I missing something? I can't find any LEED... Read more

Hi, we need 3-4 folks to volunteer to join us to work out a draft Materials section for the Contractors Commitment.  Meeting set for 6/16 @ 2 PM CST.

Please message me at pslloyd@leopardo.com if interested in participating.  I will forward out the meeting invite. If the time doesn't work, but you want to participate, I will share info in... Read more

Hello everyone!

I'll be using this thread to post call reminders and notes.

To start us off, the next call is this coming Tuesday, March 24th at 1pm Eastern.

The topics we will be discussing include:

Around the “room” quick check-in. How’s everyone doing? What’s top of mind for you? Able to keep projects and... Read more

Composite windows come in two basic types: fiberglass, and wood/plastic composite.

BuildingGreen-Approved Windows

Fiberglass and other composite window lines have NFRC unit U-factors of 0.20 or lower. Higher U-factors are allowed for products that include significant recycled content.

Manufacturers also must demonstrate... Read more