The order
Source removal, especially attic and wall insulation; cleaning of surfaces and ducts; treatment with thermal fogging, hydroxyl and, in sealed spaces, ozone; sealing of framing, subfloor and surfaces before insulation and drywall; verification by smell with the house closed and heated, once before walls close and once at completion.
Why before finishes
Once drywall is up, the cavities are closed and any odor left in them is permanent until the wall is opened again. The verification step before insulation and drywall is the one that matters most.
On the claim
Deodorization and sealing are scoped by method and area and billed directly to your insurer on covered claims.

