How to prevent wallpaper from being moldy?

1. Choose Breathable Materials

There are various types of materials available in the market today, including non-woven fabric, wood fiber, PVC, glass fiber substrate, and cloth surface. Among these, PVC wallpaper is the most airtight, which can trap moisture inside the wall. Over time, this can lead to dampness and even mold growth. To avoid such issues, it's better to choose more breathable options that allow proper air circulation.

2. Keep the Wall Dry

Maintaining a dry wall is crucial before applying any wallpaper. If you're working with newly constructed walls, it's recommended to wait between 20 to 40 days before installation. This allows the cement to fully cure and prevents future moisture problems. Also, be cautious during renovation—avoid using sea sand, which contains high salt content and can lead to long-term water retention in the walls.

If you're renovating an old house, make sure to fill any gaps or cracks in the wall before applying the wallpaper. Otherwise, the wallpaper may not stick properly and could peel off over time.

3. Pay Attention to Installation Quality

As the saying goes, “three parts material, seven parts workmanship.” The success of your wallpapering project largely depends on the details during installation. When laying out the wallpaper, check for any large gaps between the strips and ensure that the pattern aligns correctly. It’s also important to note that watering the wall during installation can cause the paper to shrink as it dries. Try to avoid placing the seams in areas exposed to direct airflow, as this can cause uneven drying and visible lines.

4. Follow Proper Maintenance Practices

Proper care after installation can significantly extend the lifespan of your wallpaper and improve its resistance to moisture. For the first 24 hours after installation, avoid opening windows or doors, as excessive ventilation can cause the wallpaper to dry too quickly and crack. After three days, gradually introduce ventilation by opening windows during the day and closing them at night to prevent humidity from affecting the adhesive and weakening the bond.

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