Frequently Asked Questions




Roofon and Roofon Edge: To Get Started

Roofon and Roofon Edge: Troubleshooting

Extruder Tips

  1. Number one rule is to thoroughly read the manufacturer’s extruder operators manual before beginning extrusion welding. Pay particular attention to line cord specification and length, and insure that the generator used can adequately provide the extruder wattage required.  Using a generator undersized to that which is required to properly power the extruder, could result in damage to its’s sensitive electronic components.
  2. (Over 95% of phoned-in trouble shooting calls to our Service Dept. are power line cord related and/or generator is undersized)
  3. Similar to steel welding and plastic welding -- temperature, pressure, and speed all contribute to a successful extrusion weld.
  4. Liner material and welding rod must be clean and dry. Use a 50/50 mixture of Simple Green and water for cleaning as this combination will wick away moisture.  Never use 100% water to clean liner, since moisture remains on the surface despite its dry appearance.
  5. Lightly grind/scuff edges (2”- 3” distance in on both panels) to be extruded with some form of light sanding wheel to scuff material. Scuffed area will oxidize immediately, so extrusion should begin soon after.
  6. Consider current ambient temperature, possible wind conditions, which affect liner temperature and dispensed molten plastic, ultimately affecting extruded weld quality. Adjust extruder temperature accordingly, and/or operators’ pace.
  7. Tie and pull snug a small piece of cloth in a knot around the welding rod where it enters the extruder. This will act as a “wiping cloth” to help minimize the amount of dust/debris being pulled in to the internal extruder barrel.
  8. Never use welding rod that has gotten wet. If wet welding rod enters the extruder barrel, it will steam off the moisture internally as it is heated in the barrel, creating small air pockets/bubbles in the extruded seam with weld quality being compromised.
  9. Place the extruders Teflon tip evenly positioned overlapping both panels.
  10. A thin (approx. 1/8” thick) layer of extruded material with a small raised lip on each side of the Teflon welding shoe will typically result. If extruded melted rod is too thick, operator should increase his/her pace accordingly.
  11. Let weld cool and test pull the seam.
  12. Cut patch pieces in a circular or oval pattern and large enough overlapping the area needing repaired, as there is no need to patch 90-degree angles which will waste welding rod.
  13. Shutting down extruder: snip off welding rod at extruder entry point and pull trigger until you hear RPM’s increase. This procedure “bleeds” some of the remaining melted rod and once higher RPM’s are heard, release the trigger. Follow extruder manual for reducing both mass and heat temperatures before turning extruder off completely.   Extruder takes a while to cool down.  Allow leftover extruded material to hang from the Teflon tip cooling for 10- 15 minutes.  Use thin tip needle nose pliers to reach in (without damaging the tip) thru Teflon tip opening and gently pull out partially cooled material.  This will remove some of the leftover melted rod residing internally in the Teflon tip. Performing this procedure will help reduce start-up/heating time for the next extrusion project.