Completed project · Westminster, CA 92683 · August 2026
It started with a free attic inspection. 808 attic + 190 walls sq ft of Westminster attic, taken back to bare joists and rebuilt. New R-38 24in Fiberglass Batts installed on a stripped, sealed deck. Plus R-19 in the walls.
Seeing the same signs in your attic? The inspection is free.
The challenge
Moderate rodent activity, and open ways back in
The inspection found moderate rodent activity in the Westminster attic — droppings and nesting material, worked into the insulation itself — along with unsealed gaps around fixtures, piping and vents.
Once contamination is inside the insulation layer, cleaning around it does not fix the problem: the material holds the waste, the odor and the scent trail that brings the next rodent back. That set the order of work — clear the layer, treat what is underneath, close the entry points, and only then insulate. The layer covered 808 attic + 190 walls sq ft.
The service
What the crew did, in order
Remove the old insulation
The existing insulation layer taken out with a heavy-duty vacuum across 808 attic + 190 walls sq ft, leaving bare joists and a clear view of the deck.
Clean and sanitize
Rodent waste, droppings and nesting material vacuumed out, then the surfaces treated with OdoBan sanitation to clear odor, bacteria and the scent trails that draw rodents back.
Seal and rodent-proof
Entry points sealed with wire mesh, polyurethane foam and cement, with two to four indicator traps set to confirm the space stays clear. Gaps around fixtures, piping, wiring and vents air-sealed in the same pass — the openings that leak conditioned air are usually the ones rodents use.
Air ducts
7 duct runs replaced with new flexible R6 ducts, installed to code at matching diameters.
New insulation
New R-38 24in Fiberglass Batts; R-19 24in walls installed across 808 attic + 190 walls sq ft, bringing the attic to current California code on a clean, sealed deck rather than on top of the old layer.
The result
808 attic + 190 walls sq ft, cleared, sealed and re-insulated
The attic went from an active rodent problem to a code-level space in a single visit – cleared, sanitized, closed against re-entry, and rebuilt in R-38 24in Fiberglass Batts. The scope also covered R-19 to the walls.
More from this job
A few more shots from the crew
Around the neighborhood
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One of 850+ completed projects across California — see all projects.
Questions homeowners ask
Attic work in Westminster, answered
Does old attic insulation have to be removed, or can new insulation go on top?
It depends what the inspection finds. Where the existing layer is clean and intact, Atticare USA can add over it. On this Westminster project the crew found moderate rodent activity in the insulation itself, so the whole layer came out and the space was sanitized before new insulation went in — why the order of operations decides whether it holds. More on the choice: cleaning versus full replacement.
What does rodent proofing include in Westminster?
Rodent proofing is exclusion work: sealing the gaps and openings rodents use to get in, with wire mesh, polyurethane foam and cement. Live removal, where it is needed, is handled by a licensed pest control provider. Atticare USA has written up the entry points rodents actually use and the 5-step restoration process that follows. Worth reading before you compare quotes: how to compare rodent-proofing warranties.
How do I know when air ducts need replacing rather than cleaning?
Flexible ducting has a service life. Once the inner liner has torn or the insulation around a run has broken down, cleaning does not restore it — conditioned air keeps escaping into the attic. At that point replacing the run is the fix. More: air duct questions answered.
Start the same way this job did.
A free attic and crawl space inspection in Westminster tells you what is actually up there — what it would take to put right, and what it would not.
