I hear you on the wind, but honestly, I don’t trust my nose for anything except telling me when lunch is burning. I stick with the probe, even if it’s a pain. Ever tried using a temp gun instead? I get fewer surprises that way, even when the wind’s acting up.
I get where you’re coming from with the temp gun, but I’ve had mixed luck. Maybe it’s just me, but half the time I’m chasing the right angle or getting a weird reading off the membrane if the sun’s out. The probe at least gives me something to poke into the seam, though yeah, it’s a pain when you’re juggling tools and trying not to trip over cords.
Wind is always throwing curveballs. Had a job last month where gusts kept cooling one side of the lap—looked fine until I went back and found cold welds hiding under what seemed solid. Nose test? Mine’s only good for telling me when someone microwaves fish in the breakroom...
Curious if you find the temp gun works better on darker or lighter TPO? I swear the white stuff reflects so much light it throws everything off. At this point, I just keep all three—probe, gun, and my questionable instincts—and hope for the best.
Curious if you find the temp gun works better on darker or lighter TPO? I swear the white stuff reflects so much light it throws everything off.
That’s been my experience too, especially with the white TPO. I’ve had the temp gun read 20-30 degrees cooler than what’s actually happening at the seam, just because the glare messes with it. On gray or tan, it seems a little more reliable, but even then I don’t fully trust it if the sun’s out. Sometimes I’ll shade the spot with my hand and try again, but that only helps so much.
Wind is a whole other headache. I had a section last spring where the wind was funneling between two buildings—one side of the lap was perfect, other side looked good but failed the probe test later. It’s like you said, juggling tools and cords while trying not to lose your hat.
Honestly, I’m with you—probe, temp gun, and a whole lot of “does this feel right?” gut checks. There’s no one tool that nails it every time. Wouldn’t mind if someone invented a magic wand for this stuff, though...
Honestly, I’m with you—probe, temp gun, and a whole lot of “does this feel right?” gut checks. There’s no one tool that nails it every time.
That’s the truth. I’ve seen guys rely on temp guns and end up with cold welds, especially on bright days. I usually trust the probe test more than anything else, but even then, wind or a sudden cloud can throw things off. Sometimes I’ll check the back side of the seam if I’m unsure—if it’s too crispy or smells burnt, you know you’ve gone too hot. It’s a balancing act for sure.
I’ve always wondered—does anyone actually trust the temp readouts on those automatic welders? I’ve seen them drift a lot, especially when the sun’s beating down. Ever had a seam look perfect but fail a pull test later? That’s happened to me more than once...
