Prioritize these products: 3
Finding it impossible to avoid XPS? Spec the product featured below or minimize its use by specifying it only where alternatives have a shorter history of use (such as under the slab) and use cleaner materials elsewhere. Alternatives such as mineral wool have more of a track record in low-slope roofs and rainscreen assemblies. 4
Visit these sources for more information.
1 https://healthybuilding.net/blog/463-hbcd-free-styrofoam-insulation-coming-to-usa
2 https://synergist.aiha.org/201511-new-use-rule-for-flame-retardant-hbcd
3 https://www.buildinggreen.com/product-guide/board-insulation
4 https://www.buildinggreen.com/feature/great-eight-high-impact-material-choices-green-building
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