Do Timber Floors Shrink In Winter?

In the colder months, timber floors may contract due to the decrease in temperature and humidity levels. These changes can cause the wood floors to shrink in winter, leading to gaps between the floorboards. This phenomenon is a natural response to environmental factors and is important to consider when installing or maintaining timber floors.

Why Timber Floors Shrink in Winter

1. Humidity Levels

• Lower Humidity: During the winter, indoor air often becomes drier due to the use of heating systems. Timber is a hygroscopic material, meaning it absorbs and releases moisture from the air. When the air is dry, timber loses moisture and contracts, leading to gaps between the floorboards.
• Relative Humidity: Ideally, the relative humidity for timber floors should be kept between 35-55%. In winter, indoor humidity levels can drop below this range, causing timber floors to shrink.

2. Temperature Fluctuations

• Cold Weather: Cold air holds less moisture than warm air. As outdoor temperatures drop, the air inside homes also becomes drier when heated, exacerbating the shrinkage of timber floors.
• Heating Systems: Central heating systems can further reduce indoor humidity, intensifying the contraction of timber.

Preventing and Managing Shrinkage in Timber Floors

1. Humidifiers

Using a humidifier can help maintain optimal humidity levels in your home during the winter, reducing the extent of shrinkage.

2. Proper Ventilation

Ensuring good ventilation helps regulate indoor humidity levels and can mitigate the drying effects of heating systems.

3. Consistent Indoor Environment

Keeping the indoor temperature and humidity as stable as possible throughout the year can help minimise the expansion and contraction of timber floors.

4. Acclimation

When installing new timber floors, it is crucial to let the wood acclimate to the indoor environment for several days before installation. This helps the timber adjust to the local humidity and temperature, reducing the risk of shrinkage or expansion after installation.

Seasonal Changes in Timber Floors

1. Winter

As explained, timber floors tend to shrink due to lower humidity levels, leading to visible gaps between floorboards.

2. Summer

Conversely, in the summer, higher humidity levels cause timber to absorb moisture and expand, which can lead to buckling or cupping if the timber has no room to expand.

Understanding the behaviour of timber in response to seasonal changes can help you better manage and care for your timber floors. By maintaining a stable indoor environment and taking preventive measures, you can minimize the effects of shrinking and expanding, ensuring the longevity and beauty of your timber floors.

For more information on how to restore your hardwood floors to their former glory, contact the expert team at Brisbanes Finest Floors on 0411 220 488 today.

References

• Australian Timber Flooring Association, “Heating Systems & Timber Floors“.
• Australian Timber Flooring Association blog, accessed 15 July 2024