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Thresholds are installed below doorways to insulate the gap between the door surface and floor surface. They are also used to create a seamless transition between two floor surfaces. For a standard 3’x7’ door, this would be equivalent to a length of 3’ of threshold, which is the length of the door bottom. Threshold are typically comprised of one material with or without a supplemental gasketing. National Guard Products offers thresholds manufactured of aluminum, architectural bronze and stainless steel. Thresholds can be offered with a variety of finish options including mill finished, bronze finished, polished, powder coated and slip resistant. The threshold products covered in this EPD include 612SS, 613SS, 8150, 8170, 838, 8434N, 8434P, 8434S, 8434V, 884N, 884P, 884V, R125, R125SIA, RO75, and RO75SIA. All values in this EPD are for the representative product RO75 chosen due to it having the median impacts of all the included products. The impacts of each product mentioned are within ±10% of the representative product’s impact.