When installing luxury vinyl plank (LVP) in a basement over concrete, do you really need a 6-mil poly vapor barrier? We did some detective work and called several vinyl plank manufacturers—we got three very different answers: - One said vapor barriers are unnecessary and discouraged their use - Another said they’re required on concrete and crawl spaces due to moisture and calcium concerns - A third insisted on using them, but wouldn’t explain why So what’s a homeowner supposed to do? Our current