Wallpaper and Humidity: How to Prevent Mould in Luxury Wallpaper
April 18, 2025 – Esther D'Amico
Table of Contents
Introduction | Wallpaper & Humidity | Materials & Preparation | Installing Mould‑Resistant Wallpaper | Maintenance Tips | Common Issues & Troubleshooting
Excess moisture often leads to unsightly mould that damages wallpaper and poses health risks. From regular ventilation checks to using breathable wallpaper and adhesives, we’ve highlighted the best ways to protect walls—dealing with condensation spots, managing temperature, and choosing the right materials— so you can enjoy beautiful wallpapers without worrying about hidden fungi.
What's the Relationship Between Wallpaper and Humidity?
Understanding this relationship shapes the lifespan of luxury surfaces. Mould spores multiply rapidly if indoor moisture exceeds 60 %. Ask your installer to check wall‑surface humidity with a digital meter and keep readings between 40 % and 60 %. Wallpaper adhesives maintain stronger bonds at these levels.
Approximate thresholds and their impact on adhesion and mould:
| Relative Humidity (%) | Potential Impact on Wallpaper |
|---|---|
| < 40 | Dryness that leads to peeling |
| 40 – 60 | Balanced conditions that minimise mould growth |
| > 60 | Elevated dampness that encourages mould |
Seal gaps around windows and doors, improve air circulation with vents, choose breathable non‑woven wallpapers, and use adhesives with anti‑fungal properties for extra protection.
Materials and Preparation
Our recommended installers always do the following.
Tools and Materials
- Measuring tape, sharp utility knife, wallpaper smoothing tool
- Breathable wallpaper with anti‑fungal properties
- Moisture‑resistant wallpaper paste that limits fungal growth
- Sponges, disinfectant, and protective gloves to maintain cleanliness
Wall Inspection & Cleaning
Examine walls for cracks, peeling, or stains that indicate humidity. Remove old wallpaper and flaking paint, wash with mild detergent, rinse, and disinfect to eliminate hidden spores. Keep indoor humidity between 40 % and 60 % as recommended by standards.
Installing Mould‑Resistant Wallpaper
Choose mould‑resistant when installing wallpaper to safeguard walls in humid areas; it minimises fungal spread and supports indoor hygiene.
Proper Adhesive Technique
Choosing the right wallpaper paste blends with anti‑fungal agents. Follow the manufacturer mix ratio; apply one thin coat for lower humidity or two coats for higher humidity. Press edges firmly and allow full drying before inspection.
How to prevent mould in wallpaper
Consistently monitor humidity—mould spores thrive in moist air. Key steps:
- Check corners every 3 weeks if humidity > 60 %.
- Vacuum surfaces at cracks and joints to remove dust.
- Wipe walls with a dry microfibre cloth after condensation.
- Record readings with a digital meter (target 40–60 %).
- Ventilate areas by opening windows or using fans.
- Observe adhesives; re‑paste if edges loosen.
Common Issues and Troubleshooting
Watch for moisture infiltration and mould. Inspect edges, corners, and discoloured patches regularly.
- Peeling edges near windows/doors – reapply moisture‑resistant adhesive.
- Bubbling sections – pierce bubbles with a pin, smooth flat.
- Mould spots – clean with anti‑fungal solution; use dehumidifier.
- Discolouration – touch‑up paint and improve ventilation.
- Adhesive failure – patch with enhanced anti‑fungal adhesive if RH > 60 %.