Threshold Trim is adhered to the entrance of a doorway, particularly at the entrance to the garage. Threshold Trim provides a more finished look to a project and prevents drafts, dirt, bugs, debris, and water from getting under mats or into the premises. Our Threshold Trim is a 4” polyvinyl strip with a tapered edge and is sold as an independent accessory, not part of a G‑Floor installation process. Threshold Trim comes with Liquid Nails to adhere to the cement. The ribbed section of the Threshold Trim should make contact with the weather stripping on the bottom of the garage door. Check it out here: https://bltllc.com/gfloor-universal-flooring/accessories/