At the loading dock a gap exists between the dock leveler and dock pit wall, often being around a 1” gap on either side of the dock leveler. The dock leveler - pit gap can amount to having a 12” x 12” window of air infiltration into your building per dock position. We highly recommend to close this portion of your building opening to loss of conditioned air out and unconditioned air in with your choice of rubber or brush weatherseals.