I'll let a contractor weigh in but I'll bet that old vinyl will act as a vapor barrier for your new floor.

Insulation and vapor barrier.

Here are the comments:Nick Aalerud Meth labs are tough... definitely not for newer investors...19 hours ago · Like.James Gage Have to encase them or do a total rip out like lead....13 hours ago · Like.James Gage If you encase don't forget vapor barriers.13 hours ago · Like.Nick Aalerud First you need to call the local police station though, to ensure investigations are not ongoing.

But that is what it looks like in the photo and can't see the ceiling.Old houses used tar paper as a vapor barrier and can be changed out, maybe during an electrical update.

We look for a dry crawl space, vapor barriers, and windows/doors that seal completely.

We installed drains, sump pump, vapor barrier on the walls.

There’s already a vapor barrier under the house, but sometimes water pools on top of it.

Repaired and painted fencing; repainted and repaired exterior where needed; lawn care; interior paint in all bedrooms and bathrooms; small repairs within interior; added hardware to kitchen cabinets; removed insulation from crawlspace and added vapor barrier; flashing and siding repairs; removed junk from yard and exterior building...

There was never a vapor barrier put in place under the home or gutters along the roof.

For mold remediation (air quality test in livable areas came back acceptable), sump pump/french drain, vapor barrier and some jack post installation, it’s going to cost me between 12k-16k.