Heads up: check your poly film supplier actually gives you 6 mil not 4

I just finished a job over on Elm Street and the homeowner wanted me to redo the vapor barrier because his last guy used thin junk. Turns out half the rolls labeled 6 mil from this local supplier are actually 4 mil when you mic them. I checked my own stash and three out of five rolls were short. Has anyone else caught this with their supplier in the Midwest?

3 comments

3 Comments

hart.sage21d ago

Three out of five? I'd probably still trust myself with a micrometer... oh wait.

leodavis21d ago

I mic'd a batch from Menards last month and found the same thing, two out of four rolls were under 5 mil. It's probably worth buying a cheap micrometer just to spot check everything before you start. Saves getting that call back from a homeowner with a moisture meter.

the_kim20d ago

Haha wait, three out of five rolls were bad?! That's insane, I can't believe they'd let that much crap out the door.