Enhance your home with OnDek Vinyl Worx by creating a functional living space under your waterproof deck
March 13, 2024Ultra Edge
February 10, 2026ULTRA SEAM
Welded seam engineered for long-term waterproofing
What Makes Ultra Seam Different?
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Clean Selvage Edge
No fleece remnants — no seam contamination
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Stops Fleece for Weld
Backing stops short from the edge of the vinyl
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PVC-to-PVC Weld
Watertight seam welds true “vinyl to vinyl”
Seam Strength Test
PVC-to-PVC welded seam tested for strength.
Typical Seam
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Higher risk of seam contamination
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Fleece remnants can compromise seam integrity
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Less confidence in long-term waterproof performance
Ultra Seam
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Clean selvage edge helps prevent seam contamination (no fleece in the weld)
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Pure vinyl-to-vinyl weld (PVC-to-PVC)
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In independent testing, the PVC-to-PVC welded seam proved stronger than the vinyl membrane itself
