PVC and TPO Flat Roofing Installation - Step by Step guide showing installation of Roof Insulation, Field Welding of PVC / TPO membrane sheets with Liester Varimat automatic welder and hand welding with Liester Triac hand welder, probing the seam welds, doing a seam cut test and patching the hole in the roof.\r
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In this video you will see installation of high density insulation. Next, PVC roof sheet is welded with Liester automatic welder at 15 feet per minute.\r
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Then you can see TPO roof being welded with hand welder (Liester Triac).\r
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Finally a seam weld is tested with probe and then a test cut is made. a 2x4 piece of roof is cut out across the seam, to test the depth and quality of the weld. A pull test is performed to make sure seam does not com apart.\r
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Finally, the hole in the roof is patched by welding a 9x12 patch of PVC material. Repairing PVC / TPO flat roofs can easily be performed in the same manner - welding a patch of virgin membrane over aged membrane (after proper cleaning).\r
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For more info on PVC roofing, go to \r
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For more info on differences between TPO and PVC roofs see PVC vs TPO guide by Cool Flat Roof -
