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

Hi all,

We recently learned that Mass Dept of Environmental Protection (MassDEP) along with a few other state agencies are looking to offer grants for wastewater heat recovery implemented into projects. This is a newer technology that puts a heat exchanger or heat pump in the wastewater system that then extracts the heat energy and... Read more

Hi everyone,

We're hoping to do some building monitoring as part of Building Use Evaluations on our built work, starting with projects in East Africa, to ensure they are performing as intended and to keep supporting our partners. Ultimately we want to be able to log light, noise, temperature, humidity and CO2 concentration. This does not... Read more

Hello - Other than hiring an acoustic consultant, I am wondering what in-house tools you are using internally at the design stage for modelling acoustic performance? 

Thanks, Mona

Hello All,

News Bulletin: The 2020 SDL Winter Summit will be held January 29th - January 31st, 2020 at The Lodge at Gulf State Park, Alabama!

During the 2019 Winter Summit, we discovered such an amazing venue at the Gulf State Park in Alabama that we’ve decided to go back! This incredible beachfront hotel designed by Lake|Flato is... 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

Since the launch of the Contractor’s Commitment in late 2020, nineteen companies have become signatories and many others are using the guidelines as a roadmap for their firms.   Now that the pilot year of the Contractor’s Commitment is complete, it is important to consider if and how the guidelines should evolve to be the most impactful.  Over... Read more

Hi All,

If you have 5 minutes, we would appreciate your input in the Google Spreadsheet (linked below).  If you only have 1 minute, feel free to reply to this forum post and list your the typical equipment vendors you spec on projects.  :)

We're asking each of you to enter your "Top 3" specified vendors for each of the products... Read more

Welcome to the quiz portion of Certified Wood Update: Comparing SFI to FSC on Key Forestry and Health Issues.

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


1. Explain the purpose of forest management standards and what they measure.
2. Differentiate between FSC and SFI... Read more

This question came to me via our mutual friend Josh Jacobs, but while interesting it's a bit out of my range of expertise... 

In short, a critical materials assessment specifically focused on airbourne byproducts from a manufacturing process that would be first-of-its-kind in the U.S. 

Five types of green buildings explained. Check out this great infographic by the Pembina Institute: What do net-zero and zero-carbon buildings mean for energy use and climate pollution?

Hello SCL peeps, 

Thank you to all the people who filled out our 2021 event survey. Your feedback did help us narrow down the options, but it was still inconclusive about whether there’s enough interest in doing an SCL-only Summit. 

To stay on schedule with our planning (and to make sure the event will pencil out financially), we... Read more

Is EV100 on your radars? We're reviewing our company leases and aleady have employee free access to EV charging at our office and jobsites by request (if technically feasible).

"With businesses owning over half of all new registered vehicles on the road, it is crucial that companies lead the shift to electric vehicles." Does your role in... Read more

CEUs are available for reading all the building-envelope product guides and primer. Click here to learn more and take the quiz.

Wall assemblies are made up of a number of different materials and systems, and installing each of them requires considerable time and labor and can introduce errors that compromise the building’s weather... Read more