Rocvent Inc.
Duct Repair
Ventilation tubing is subject to damage from time to time, either by being ripped by protruding objects in passing vehicles, or from blasting. Rocvent offers a repair service that will completely repair most damaged tubing by either radio welding patches, or sewing.
Getting Your Damaged Product To Us
In addition, we do ask that you send us damaged tubing in quantity so that shipping costs can be kept to a manageable level.
Source: http://www.rocvent.com/index.php/services/duct_repair/