Gypsum is calcium sulfate dehydrate, which is mined or produced as a byproduct of flue gas desulphurization (FGD) from coal-fired power plants. FGD gypsum may contain trace contaminants from coal processing, but not enough to represent a hazard to users. Years ago, some imported products created indoor air quality problems that required... Read more

Hi - We have some projects within reasonable reach of ILFI's Zero Carbon Certification, which will require purchasing some off-site renewable energy. As a State Building Code Council member, I'm also eyeing the Zero Code which we will seriously consider in the next 12 months; this also requires a purchase of off-site renewable energy. 

I... Read more

I'm exploring the use of phase change material for a project. Specifically, looking at the BioPCM/ENRG Blanket product. I see on their website that ZGF used it at University of Washington. I'd love to hear any feedback from folks who have used it, and more specifically how your energy model and MEP engineer accounted for it. Thanks!! https://... Read more

He just posted the following on the Building Performance Knowledge Community forum:

Does anyone have a recommendation for software that is easy to use and relatively inexpensive for doing energy performance analysis at the schematic design (or before) phase?  We are looking for a tool that gives good quantitative comparisons for... Read more

Practitioners interested in reducing the embodied carbon of buildings are likely now used to considering the impact of different materials, like mass timber or low-carbon concrete. Low-carbon construction, however, may be less familiar. 

Contractors are just... Read more

Were we given any warning that LEED Online and USGBC.org would be down for a week?  

Dear all,

A mechanical engineer on a healthcare project we are working on has asked for help in dividing the ventilation calculations between ASHRAE Standards 170 and 62.1; can anyone here help shed some light on it?

"This is the first time I am working on LEED for a hospital and I am not sure how the template wants me to show... Read more

Is everyone else having trouble with a dysfunctionally slow LEED-Online today (i.e., worse than the usual incredibly slow performance)?

Mary Ann Lazarus

Welcome to the quiz portion of Can We Replace Foam Insulation?

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


1. List four ways in which foam is environmentally problematic and provide four examples of foam replacements.
2. Discuss the industry's relationship with foam... Read more

Hello SCL,

Version 2.0 of the Contractor's Commitment has officially been ratified with 33 "yes" votes out of 52 members. Congratulations, and a big thank you to everyone who helped move this forward--especilly Amanda Atkinson, who really took this project by the horns. 

You can find the updated version here.

Next, I'll be... Read more

Would anyone have an example LEED Homes v4 specification they would be willing to share?  We are working on our first LEED Homes project, a midrise low income housing development here in Houston.  We have a LEED Homes provider, but she will not provide the specifications, which seem to be quite different in requirements and submittals from our... Read more

Hello everyone,

Wondering if anyone has evaluated/considered/specified wood fiber insulation for use in lieu of mineral wool as the exterior wall insulation?  Am mostly looking to better understand domestic availability, r-value and fire/combustibility.

We have a multi-family building in DC where the client is interested in using... Read more

Hi everyone, 

We’re so excited to announce that registration for the 2025 SMEPL Summit is now live! Register here and save your seat to join BuildingGreen, your SMEPL peers, and members of all three other networks for a first-of-its-kind summit this year.

In addition to the SMEPL Summit, you’ll have the option of joining us for... Read more

Https://www.metropolismag.com/architecture/yale-un-environment-eco-living-module/pic/44437/

Many of you will be passing through NYC on your way to the SDL Summit in Garrsion this week. I encourage you to make a pit stop at the United Nations. You’ve heard me talk about the next generation, tech transfer building systems... Read more