I've never seen this flooring insulation - Structural Inspections

I’ve never seen this flooring insulation. What type of batt insulation is this? Each batt is wrapped in grey plastic with micro holes in it. I didn’t think to look at the other side. I know, dumb.

Failed inspection because insulation not stapled? Or bigger problem? : r/HomeImprovement

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The Ultimate Guide to Attic Insulation - The Craftsman Blog

New construction - gaps between floor and baseboards

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I've never seen this flooring insulation - Structural Inspections

Crawl Space Repair, West Colorado

Father in law said it was useless to strip basement to re-insulate : r/HomeMaintenance

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Foam Insulation 1970 or earlier - Interior Inspections - InterNACHI®️ Forum

A friend is having a house built. This doesn't look right to me but I know nothing. Thoughts? Passed framing inspection. : r/Carpentry

Byrnes Oak 12-mil x 9-in W x 60-in L Waterproof Interlocking Luxury Vinyl Plank Flooring

STAINMASTER Byrnes Oak 12-mil x 9-in W x 60-in L Waterproof Interlocking Luxury Vinyl Plank Flooring

Radiant Barrier Insulation Roll, Reflective Insulation Roll, 1000 Sq Ft (250x4), Double Sided, Perforated, Aluminum Insulation Roll, Industrial Heat Shield House Wrap for Wall Roof Attic