Crunch-resistant garage doors feature a layout that pushes fingers out of harm's way should they accidentally be put too close to a closing door. Tamper resistant bottom brackets reduce the risk of harm from garage door components under tension. The polyurethane insulation even provides better fire safety in that this kind of insulation lowers the number of smoke and fires in the event of a fire. The thermal property of insulation is expressed as an R-value. A higher R-value reduces external sound and helps the door function more softly. Many Insultated Doors are constructed using polystyrene or polyurethane foam.

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