Crunch-resistant garage doors feature a layout that pushes fingers out of harm's way should they accidentally be set too close to a shutting door. Tamper resistant bottom brackets lessen the chance of injury from garage door components under tension. The polyurethane insulation even provides better fire safety in that this type of insulation reduces the amount of smoke and flames in the event of the fire. The thermal property of insulation is expressed as an R-value. A higher R-value reduces external noise and aids the door function more quietly. Many Insultated Doors are constructed using polystyrene or polyurethane foam.

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