Combatting Common TPO Welding Problems - February 2021

By Trent Cotney, FRSA Legal Counsel, Cotney Construction Law
Sat, Feb 06, 2021

These membranes are used for mechanically attached, adhered and induction-welded roofing systems. Over the years, we have seen a variety of warranty claims and Chapter 558 pre-suit notices related to seam welding. This article will briefly explore these issues.

Welding seams at the correct temperature is paramount. In the event that you have concerns over the adhesion of the seams, you should perform several test welds to ensure the welder is properly calibrated. The goal is to avoid excessive heat that destroys the polymer stabilizers in the TPO and leads to premature membrane deterioration. Conversely, if the weld is too cold, it may appear functional when probed but will detach over time, thereby allowing water infiltration. Test welds will help ensure that you have the proper temperature to avoid weld failure. Read More. 

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