What humidity level should we aim for year-round to protect floors?

Maintaining 30-50% relative humidity year-round is ideal for protecting most flooring types, with hardwood being particularly sensitive to humidity fluctuations outside this range.

Hardwood floors are most vulnerable to humidity changes. When humidity drops below 30% (common in Ottawa winters with forced-air heating), wood planks can shrink and create gaps between boards. Conversely, humidity above 60% can cause boards to expand, leading to cupping, crowning, or buckling. The sweet spot of 40-45% relative humidity minimizes seasonal movement while keeping your hardwood stable and beautiful.

Engineered hardwood and laminate are more dimensionally stable than solid hardwood but still benefit from consistent humidity levels. Extreme dryness can cause joint separation in laminate flooring, while excessive moisture can damage the core materials. Luxury vinyl plank (LVP) and tile are largely unaffected by humidity changes, making them excellent choices for basements or homes where humidity control is challenging.

In Ottawa's climate, achieving consistent humidity requires seasonal adjustments. Winter heating systems can drop indoor humidity to 15-20%, so whole-home humidifiers or portable units become essential for protecting hardwood investments. Summer humidity often exceeds 60%, making dehumidifiers or air conditioning necessary to prevent moisture damage.

Practical monitoring involves placing digital hygrometers in main living areas and checking levels weekly. Gradual adjustments work best - sudden humidity changes can shock wood floors even more than gradual seasonal shifts. Most HVAC systems can integrate humidity control, and programmable humidistats help maintain consistent levels automatically.

For homes with valuable hardwood flooring, investing in proper humidity control protects your flooring investment and maintains manufacturer warranties. Want to discuss humidity considerations for your specific flooring project? Ask about environmental factors when a contractor quotes the job — it is the point at which they are easiest to fix.