The BAK TechOn roof welding machine is a 120V automatic hot air welder for TPO and PVC up to 60 mil, sized for repairs, tie-ins, and small roofs. The selling point is the plug. It runs on a standard 120V outlet at under 15 amps, so you can work off building power or a small generator instead of hauling a 230V machine and the generator it needs up to the roof.

Digital temperature and digital speed control are what make it repeatable. You dial in a setting from your test welds, and the machine holds it. Auto drive starts the machine moving as soon as you engage it, which keeps the seam from scorching at the start of a run. The compact frame lets it weld close to the base of walls and curbs, where a full-size automatic welder will not fit and a crew would otherwise be hand welding.

Run test welds before every job and every time conditions change. Set the temperature from the results, then adjust speed as the seam tells you. Ambient temperature, wind, and membrane brand all move the numbers, and no chart replaces a probed test seam.

At $5,800 it qualifies for free LTL freight. Call 816-443-3004 with questions on setup or nozzles.

• 120V, 60 Hz, under 15 amps on a standard outlet

• 40 mm weld width

• Digital temperature control, 68 to 1,110 F

• Digital speed control, up to 13 ft/min

• Auto drive start

• Welds TPO and PVC up to 60 mil, plus industrial fabrics

• Welds close to walls and curbs

• Includes carrying case

• 18 x 9 x 13 in., 34 lbs

• BAK part number 6600513