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Community and Q&A

Foam spacers in Milgard aluminum windows

believeingreen | Posted in Green Products and Materials on

I prefer not to bring toxic outgassing into my home. For that reason, I’ve chosen aluminum windows over vinyl. But the Milgard aluminum windows either have a Gray EdgeGardMAX Spacer which uses foam, or a “Gray Foam Spacer” in their frames. Does anyone know what kind of foam they use? Is it SPF?

If it is toxic, will I be exposed to isocyanates if the seal breaks? From my
research, it seems that SPF doesn’t always cure completely. 

Thank you!

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  1. GBA Editor
    Peter Yost | | #1

    Take a look at the information on spacers at the Efficient Windows Collaborative:

    I do believe that if you are concerned about outgassing, this one is very far down the list to worry about. Having said that, your other option is to contact the window manufacturer directly and see what they have to say on the issue.


  2. believeingreen | | #2

    Thank you, Peter!

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