Defect Library · Roseville, MNVermiculite Attic Insulation in Roseville Homes
Vermiculite is a mica-like mineral expanded into a lightweight pebble for attic insulation. Most pre-1990 vermiculite was Zonolite-brand from the Libby, Montana mine, which was contaminated with tremolite asbestos.
What is Vermiculite Attic Insulation?
Vermiculite is a mica-like mineral expanded into a lightweight pebble for attic insulation. Most pre-1990 vermiculite was Zonolite-brand from the Libby, Montana mine, which was contaminated with tremolite asbestos.
What do we find on Roseville inspections?
We find Zonolite top-offs over original blown-in fiberglass in 1950s–1970s Roseville attics. Looks like silver-brown pebbles.
What should you do about it?
Do not disturb. Lab-test or treat as asbestos. Abatement runs $4,000–$15,000.
How this connects to other Roseville defects
Era-defects rarely show up in isolation. A 1965 Roseville rambler that has one of these almost always has two or three more from the same construction window. Our defect library documents the full set we look for, and the inspection report cross-references findings so you can see the pattern.
Related defects in the same era window
Get this checked on your Roseville inspection
Call (651) 666-5602 or request an inspection quote. Vermiculite Attic Insulation is included in every standard home inspection we perform. Same-week digital report with photos and prioritized repair recommendations.
Ready for a Roseville Home Inspection?
Same-week reports. Thermal imaging included. Era-specific findings for 1955–1975 ramblers, lakefront walkouts, and new-construction townhomes.