What Blinds Are Best to Avoid Mould?

You’ve seen it happen in a bathroom or kitchen—ugly black spots of mould¹ creeping onto the blinds. It's unhealthy, unhygienic, and ruins the entire look of the space, forcing a costly replacement you'd rather avoid.

The best blinds to avoid mould¹ are made from completely non-porous, waterproof materials² like PVC³, faux wood⁴, and aluminum⁵. These materials don’t absorb moisture, which denies mould the damp, organic environment it needs to grow, making them the perfect choice for high-humidity areas.

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I've consulted on countless projects where the wrong blinds were chosen for a humid space, and the results were always disappointing. Choosing the right product is less about a particular style and more about selecting the right material from the start. But even the best material needs support. The ultimate solution is always a combination: a non-porous⁶ blind material, consistent ventilation⁷ to remove damp air, and a simple cleaning routine⁸. Get these three things right, and mould doesn't stand a chance.

What Are the Best Blind Materials for Resisting Humidity?

You're specifying blinds for a bathroom, kitchen, or laundry room, and you can't afford to get it wrong. You need a material that is guaranteed to stand up to constant moisture without warping, staining, or becoming a breeding ground for mould.

The most reliable mould-resistant⁹ materials are PVC, faux wood (a PVC composite), and aluminum. They are all completely non-porous, so moisture simply sits on the surface and can be wiped away. This physical property makes them the safest and most durable choices for any high-humidity environment.

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When we source materials, performance in challenging environments is a top priority. Here’s a breakdown of the top three materials that I recommend to all my project clients for wet areas:

• PVC (Polyvinyl Chloride): This is the technical term for vinyl. It's a type of plastic that is 100% waterproof and incredibly easy to clean. It won't absorb a single drop of water, making it impossible for mould to take root within the material itself. It is the go-to choice for maximum hygiene and durability.

• Faux Wood: If you want the warm look of wood without the risk, faux wood is the answer. It’s a composite material made primarily from PVC, giving you the classic appearance of painted wood but with the full waterproof and mould-proof benefits of vinyl. It will never warp, crack, or absorb moisture.

• Aluminum: Lightweight, durable, and completely waterproof, aluminum is an excellent choice for mould resistance. It’s most commonly used for Venetian blinds. Its hard, non-porous surface offers nowhere for mould to grow and is simple to wipe clean.

Some high-tech fabrics now also come with a water-repellent or anti-bacterial coating, which can make them suitable for less extreme humidity.

How Do Different Blind Types Perform in Humid Areas?

You understand the importance of material, but now you wonder how that applies to specific blind styles. You're concerned that a beautiful Roman blind, for example, will become a mouldy mess in a bathroom, while a simple roller blind might not.

A material's properties will always be more important than the blind's style. A Roman blind made from standard linen is a high-risk choice because it absorbs and traps moisture. A roller blind made from a waterproof PVC fabric, however, is an excellent choice. Faux wood or aluminum Venetian blinds are two of the safest and most popular styles for wet areas.

Let's look at how specific blind types hold up, as this is a common point of confusion for my clients.

• Do Roman blinds¹⁰ get moldy? Yes, traditional fabric Roman blinds are very prone to mould in damp spaces. The fabric—often linen or cotton—absorbs moisture from the air, and the deep folds trap that dampness, creating the perfect conditions for mould growth. They should be avoided unless made from a specially treated, water-repellent fabric.

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• Do polyester blinds¹¹ go mouldy? Polyester is a synthetic fiber, so the material itself doesn't support mould growth. However, mould can still grow on the surface if dirt, dust, and moisture are allowed to accumulate. Blinds made from PVC-coated polyester are a much safer bet.

• Do honeycomb blinds¹² get moldy? This is a tricky one. The cellular structure that is so good at trapping air for insulation can also trap humid air from a steamy shower. While the fabric is usually mold-resistant polyester, that trapped moisture can lead to problems. They are a risky choice for bathrooms unless the room has excellent, consistent ventilation.

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• Do bathroom blinds get moldy? They certainly can if you choose the wrong material! Any blind made from untreated, porous material like raw wood or absorbent fabrics will likely develop mould in a typical bathroom. This is why material selection is so critical.

How Can You Prevent and Clean Mould on Blinds?

You’ve chosen mould-resistant blinds, but you want to ensure they stay pristine. You need a simple, effective routine to prevent any surface mould from appearing and to deal with it quickly if it does.

The best prevention strategy is to combine regular cleaning with good ventilation. After a shower or bath, open a window or run an exhaust fan for 20-30 minutes to clear out the humid air. If you do spot mould, it can be killed and cleaned off non-porous surfaces with a simple solution of white vinegar¹³ and water.

A mould-resistant material is the first line of defense, but proactive habits are the second. Here is the advice I give all my clients:

1. Promote Airflow: Ventilation is your number one tool. Mould needs stagnant, moist air. By circulating the air, you take away one of the key ingredients it needs to survive. Opening windows regularly is crucial.
2. Clean a Mould Outbreak: If you find mould, you can clean it effectively.
   • What kills mould? A simple 50/50 solution of white vinegar and water in a spray bottle is very effective at killing mould on hard surfaces.
   • Can you clean mould off blinds? On PVC, faux wood, or aluminum blinds, absolutely. Spray the vinegar solution, let it sit for about 10 minutes, and then wipe it away with a damp cloth. For fabrics, mould can penetrate the fibers, and it may be impossible to remove completely, often requiring replacement.
3. Perform Regular Dusting: Dust and soap scum can provide food for mould, even on a plastic surface. A quick weekly wipe-down with a damp cloth prevents this buildup and keeps your blinds looking new.

Conclusion

To guarantee a long-lasting, mould-free installation in a high-humidity area, your strategy must focus on materials and habits. Start by choosing blinds made from a non-porous⁶, waterproof material like faux wood, PVC, or aluminum. Then, pair that smart product choice with good ventilation and regular cleaning to ensure your space stays healthy and hygienic.

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