Everyone notices when a house has a persistent smell—but not everyone knows what those smells signify. Household Odours can be more than just unpleasant, they’re often early warning signs of deeper environmental issues.
Here are common odours and their potential causes:
- Musty or earthy smells: These typically indicate mold or mildew. Mold can grow behind walls, in basements, under sinks, or inside HVAC systems where moisture lingers.
- Rotten egg smell: This could mean a natural gas leak (from mercaptan additives) or a sewer gas backup from a dry floor drain or broken vent pipe.
- Animal smells: Dead rodents in attics or wall cavities can produce powerful, lingering odours. So can pet urine embedded in carpets, flooring, or sub-flooring.
- Chemical or paint-like smells: Off-gassing from new building materials, paint, or furniture can release VOCs (volatile organic compounds), which may affect indoor air quality.
- Smoky or burnt smells: Even long after a fire or heavy smoker has left, smoke residues can cling to drywall, insulation, and HVAC systems.
To pinpoint odour origins:
- Inspect moisture-prone areas
- Check HVAC filters and ducts
- Examine attic and crawlspace for pests
- Consider professional environmental testing
Ignoring odours can lead to long-term structural damage or health risks, especially when caused by mold or air pollutants.
If persistent odours are a concern, it might be time to investigate the hidden sources behind them and consider an ozone treatment service.
