Cleaning & Maintenance

Why Cleaning Products Matter More in a Tight Home

A home built to the Good Air Standard is deliberately tighter and better sealed than conventional construction. Mechanical ventilation replaces air leakage. This is excellent for energy efficiency and for controlling what enters the home — but it also means that anything released inside the home stays longer. Cleaning products used in a leaky house dissipate through air changes. The same products in a tight house accumulate.

This creates a paradox: families who build lower-risk homes to reduce chemical exposure then introduce cleaning chemicals that produce higher indoor concentrations than they would have experienced in their old, leaky house. The building envelope solved one problem. The cleaning protocol must solve the next.

The Minimal Cleaning Kit

General Surface Cleaning

Unscented castile soap (diluted): Plant-oil-based soap, biodegradable, no synthetic fragrances. Effective for countertops, cabinets, painted surfaces, tile. Dilute per manufacturer instructions — concentrate is unnecessarily strong for routine cleaning. Verify "unscented" on the label; some castile products include essential oils marketed as "natural fragrance."

Microfiber cloths with water: For routine daily wiping — dust, light spills, surface maintenance. Microfiber removes particulates mechanically without chemical cleaning agents. Wash cloths in fragrance-free detergent. Replace when worn.

Mold-Susceptible Surfaces

Hydrogen peroxide (3% solution): Oxidizing agent effective against surface mold, bacteria, and viruses. Breaks down into water and oxygen — no chemical residue after application. Spray on surface, allow 10-minute contact time, wipe clean. Do not mix with vinegar (creates peracetic acid). Available at any pharmacy.

For persistent or recurring mold on hard surfaces: apply 3% hydrogen peroxide, allow to sit, scrub with stiff brush, wipe clean, dry thoroughly. If mold returns, the problem is moisture, not cleaning — address the moisture source before re-cleaning.

Floors

Hard floors (tile, stone, hardwood, concrete): HEPA vacuum first (removes particulates that wet mopping spreads), then damp mop with dilute castile soap or plain water. Avoid steam mops on wood floors (moisture risk). Avoid standard floor cleaners — most contain fragrances, surfactants, and film-forming agents that off-gas continuously from the floor surface.

If carpet exists: HEPA vacuum frequently (2–3 times weekly in occupied rooms). The Good Air Standard does not recommend carpet for sensitive-occupant homes (see Flooring Protocol), but for existing carpet: HEPA vacuuming is the primary maintenance tool. Avoid carpet deodorizers, spray treatments, and steam cleaning with chemical solutions.

Glass and Mirrors

Water + white vinegar (50/50): Effective glass cleaner. The acetic acid evaporates quickly with minimal residual odor. For sensitive individuals who react to vinegar odor: plain water with a squeegee, or dilute castile soap followed by water rinse and squeegee.

Bathroom Surfaces

Hydrogen peroxide (3%) for disinfection. Effective on tile, grout, fixtures, toilet surfaces. No chlorine fumes, no ammonia. For soap scum: baking soda paste (baking soda + water) applied with cloth, scrub, rinse. Baking soda is a mild abrasive with no VOC emissions.

What to Avoid

Fragrance — The Hidden VOC Load

"Fragrance" on an ingredient label can represent dozens of individual volatile organic compounds. The term is legally protected as a trade secret — manufacturers are not required to disclose what compounds comprise the fragrance. A single "fragranced" cleaning product can emit more VOCs than all the building materials in the room combined. This applies to "natural fragrance" and essential oil–based fragrances equally.

For sensitive-occupant homes: specify "fragrance-free" on every cleaning product, laundry product, and personal care product used in the home. "Unscented" is not the same — some "unscented" products use masking fragrances to neutralize odor, adding more chemicals rather than fewer.

Bleach (Sodium Hypochlorite)

Effective disinfectant but releases chlorine gas, chloroform, and other chlorinated compounds — particularly in warm, enclosed bathrooms. Reacts with ammonia (present in urine and some cleaners) to produce chloramine gas. In a tight home with limited air changes, bleach fume concentrations reach problematic levels faster. Hydrogen peroxide achieves comparable disinfection without these byproducts.

Ammonia-Based Cleaners

Respiratory irritant. Reacts with bleach. Common in glass cleaners and multi-surface sprays. Replace with vinegar/water for glass, castile soap for surfaces.

Essential Oil Diffusers and "Air Fresheners"

Essential oils are volatile organic compounds. Diffusing essential oils continuously in a tight home creates a sustained VOC load. Lavender, tea tree, eucalyptus, and citrus oils all emit terpenes and other reactive compounds. Some individuals with chemical sensitivity react to essential oils as strongly as to synthetic fragrances. "Natural" does not mean "non-reactive."

Air fresheners — plug-in, spray, or gel — are designed to continuously emit fragrance compounds. They are the opposite of what a lower-risk home requires.

Vinegar Limitations

Vinegar (acetic acid) is frequently recommended as a "natural cleaner." Clarifications:

• Vinegar is an acid, not a disinfectant. It does not meet EPA disinfection standards for bacteria or mold at household concentrations.
• Vinegar is effective for dissolving mineral deposits (calcium, lime) and cleaning glass. It is not effective for sanitizing food preparation surfaces or treating mold.
• Do not use vinegar on natural stone (etches marble, limestone, travertine), hardwood floors (degrades finish over time), or grout (weakens cement-based grout with repeated use).
• Do not mix vinegar with hydrogen peroxide (creates peracetic acid) or bleach (creates chlorine gas).

Post-Construction Deep Clean

Before occupancy of a newly built or remodeled home, a thorough cleaning removes construction dust, adhesive residue, and surface contaminants that would otherwise become airborne during occupancy.

1. HEPA vacuum all surfaces — floors, window sills, shelving, cabinet interiors, closets, HVAC register surrounds. Construction dust contains silica, wood particles, drywall compounds, and adhesive residue. Standard vacuum filters recirculate fine particles; HEPA captures them.
2. Damp wipe all hard surfaces with microfiber cloths and water. This captures residual fine dust that vacuuming misses.
3. Clean all glass and mirrors with water or dilute vinegar.
4. Wipe cabinet interiors — remove any packaging materials, construction debris, and dust before placing food, dishes, or cookware inside.
5. Run the ventilation system continuously for 48–72 hours before occupancy (after cure periods for all coatings are complete). This exchanges the air volume multiple times and removes residual airborne compounds.
6. Replace HVAC filters after the post-construction ventilation period. Construction-phase filters captured construction dust and should not remain in service during occupancy.

Ongoing Maintenance Schedule

How It Can Fail

• Introducing fragrance after construction: Building a lower-risk home then filling it with scented candles, plug-in air fresheners, and fragranced cleaning products negates the material selection work. The tighter the home, the faster fragrance compounds accumulate.
• "Natural" assumption: Essential oils, citrus-based cleaners, and pine-sol type products are "natural" and also high-VOC. Natural origin does not mean lower chemical exposure. Evaluate products by what they emit, not how they are marketed.
• Neglecting ventilation maintenance: A home designed for mechanical ventilation depends on that system running. Dirty filters, clogged ERV cores, and deferred maintenance degrade air quality progressively. The building envelope does not compensate for a neglected ventilation system.
• Ignoring moisture indicators: Musty smell, condensation on windows, staining near plumbing — these are early indicators of moisture problems. Addressing them immediately prevents the mold problems the home was designed to avoid. Cleaning the surface without fixing the source guarantees recurrence.

Evidence Basis

Hydrogen peroxide effectiveness against mold and bacteria from CDC Environmental Infection Control Guidelines. Fragrance VOC emissions data from Steinemann (2016), Indoor Air. Essential oil VOC profiles from National Toxicology Program research. Vinegar disinfection limitations from FDA food safety guidelines. HEPA filtration standards from DOE (minimum 99.97% capture at 0.3 µm). ERV/HRV maintenance intervals from manufacturer documentation and ASHRAE 62.2 residential ventilation requirements.