"Early mornings, especially after a damp night, seemed to make the welds less consistent."
Could it be temperature rather than moisture that's affecting your welds? I've found that cooler temps early in the morning sometimes cause my welder to struggle a bit, making the seams harder to bond evenly. Moisture might play a part, sure... but have you tried comparing weld consistency on cool, dry mornings versus damp ones? Curious if you'd notice a difference then.
"Could it be temperature rather than moisture that's affecting your welds?"
Good point, but from experience, moisture definitely plays a bigger role. I've welded on chilly, dry mornings without issues, yet dampness—even mild dew—consistently messes with seam quality. Maybe it's a combo of both factors...?
- Agree moisture's usually the bigger culprit, especially with TPO. Had a similar issue last fall—dry but cold morning welds were fine, but even a hint of dew made seams sketchy.
- Still, temperature extremes can mess with weld consistency too. Too hot and you risk scorching or thinning the membrane; too cold and the weld doesn't fuse properly.
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Yeah, probably. Wonder if anyone's noticed a specific temp range where moisture becomes more problematic? Like, does mild dampness matter less at higher temps, or is it always equally troublesome regardless of heat?"Maybe it's a combo of both factors...?"
Yeah, moisture's definitely the main villain here, but temp extremes aren't innocent either. I've noticed welding around 40-50°F with slight dampness is trickier...membrane acts like a moody teenager, unpredictable no matter how careful your setup is.
Haha, "moody teenager" is spot-on. I've had similar headaches welding TPO around that temp range—it's like the membrane decides to rebel just when you think you've got it figured out. Honestly, I've found that anything below 50°F can get dicey, especially if there's even a hint of moisture. If you can't wait for warmer weather, try pre-warming the membrane a bit with a heat gun before welding. It helps smooth things out and makes the welds more predictable. Also, keeping your welding speed consistent and slightly slower than usual can help manage those unpredictable moments. But yeah, sometimes TPO just has its own plans...
