Is insulation and vapor barrier necessary?

And due to the vapor barrier, (a huge plastic sheet) all the little (and not so little ) poopies stayed nice moist and fresh!

People take shower some longer than others 365 x 46 x persons the amount of vapor moisture where did they go?

@John Tokarz I've constructed vapor extraction system for my engineering clients but not for my tenants.

Using foam to air seal provides a slight structural benefit and can also be a vapor barrier - if using closed cell foam.

The plan was to remove any Insulation if any was present, spray and apply vapor barrier but I did not go into the crawl to see extend as it was difficult to get in.

We painted the interior, added backsplash in kitchen, laminate floor in BR's, changed some light fixtures, and faucets.Contractor solved the surface water that plagued the foundation- added french drains, graded exterior, replaced the rotted gutter system, and new vapor barrier to crawl space.

It was there when we bought the house.We asked if she would like laminate hardwood floors instead, which would be installed with a vapor barrier.

These dryers heat the drum contents and condense the vapor into liquid that then goes down the drain.

Now you've made your whole FLOOR an ice-filled glass relative to the outdoors, and you're depending on essentially using a fan that blows enough to dry it out each night when the RH dips to keep from rotting out your subfloors.Why don't we, instead, understand that the outside needs to stay outside and the inside inside and install a proper thermal and vapor barrier....somewhere?