What is different about an older house
A typical older bungalow has plaster walls over lath, painted many times, with hairline cracks at corners. Floors are often original hardwood with narrow gaps between boards, sometimes covered by later carpet. There may be built-in cabinets, picture rail, original trim with deep profiles, and a basement or crawlspace below. Heating may be a boiler with radiators or a forced-air furnace added later.
Every one of those details is a place for CS dust to collect: the ledge of the picture rail, the grooves in the trim, the cracks in old paint, and the gaps between floorboards. Capsaicin oil can soak into unsealed or worn wood finishes.
Many homes in this age range also contain lead-based paint under newer layers, and some contain asbestos in old plaster texture, pipe wrap or flooring. Aggressive scrubbing, sanding or demolition to remove residue could disturb those materials.
Older materials and the usual cleaning concern
| Material | Residue concern | Handling note |
|---|---|---|
| Plaster walls | Dust in cracks and on rough patches | Gentle washing; avoid soaking old plaster |
| Original hardwood | Powder in board gaps; oil in worn finish | HEPA vacuum the gaps; ask about refinishing only if residue persists |
| Deep trim and built-ins | Dust on ledges and in profiles | Hand detailing with soft brushes and damp cloths |
| Radiators | Dust between fins that heats up | Clean before the first heating day |
| Old paint, possibly lead | Scrubbing or sanding can make lead dust | Use lead-safe practices; consider testing before abrasive work |
| Basement or crawlspace | Dust drifting through floor gaps | Inspect if symptoms persist in rooms above |
Sequencing work in an older house
Test before you abrade
If any cleaning plan includes sanding, stripping or removing plaster, ask whether lead and asbestos testing is needed first. Colorado requires state-certified professionals for regulated asbestos work; CDPHE is the agency to check with.
Dry capture first
HEPA vacuum ledges, floor gaps and radiators before any wet cleaning.
Wash gently, top down
Use damp rather than wet cloths on plaster and old finishes, changing water and cloths often.
Re-evaluate before refinishing
Live in the space and see whether symptoms persist before deciding to refinish floors or repaint.
General information for Berkeley, not a quote or professional advice. In an emergency, call 911.