How to Clean Mould Off Outdoor Blinds: Step-by-Step Guide

If you’ve noticed musty smells or black patches creeping across your outdoor blinds, you’re not alone. Many homes in Perth deal with mould more often than you’d think, particularly during the cooler months when condensation builds up on windows.

The good news is that most mould on blinds can be cleaned with simple household items you probably already have. This guide walks you through how to clean vertical blinds, venetian blinds, roller blinds, and fabric blinds properly, plus how to stop mould growth from coming back.

How to Clean and Remove Mould from Different Types of Blinds

Vertical Blinds

Vertical blinds are popular in Perth homes because they handle large windows and sliding doors well. But their fabric or PVC slats can trap dust and moisture, making them prone to mould in humid rooms.

1. Start by opening windows for adequate ventilation.
2. Put on gloves and a mask if you’re dealing with visible mould spores.
3. Take down each slat carefully and lay them flat on a clean surface or hang them over a clothesline.
4. For light cleaning, vacuum both sides using a brush attachment. This removes loose dust and debris before you introduce any moisture.
5. For mouldy areas, fill a spray bottle with equal parts white vinegar and warm water. Spray the solution onto the affected slats, let it sit for 15 minutes to kill mould, then wipe clean with a damp cloth.
6. Rinse with clean water and allow the slats to dry completely before rehanging, usually around two hours on a warm Perth day.

If your vertical blinds are made from fabric, be careful not to oversaturate the material. Too much water can cause shrinkage or leave water marks. For stubborn stains, a paste of baking soda and water applied with a soft brush works well.

Venetian Blinds

Venetian blinds, with their horizontal aluminium or timber slats, collect dust quickly. The gaps between slats also trap moisture, especially in bathrooms or kitchens.

1. Close the blinds fully so all slats face the same direction.
2. Dust them with a microfiber cloth or vacuum with a brush attachment.
3. For mould removal, use the vinegar solution in a spray bottle. Spray lightly, wait a few minutes, then wipe each slat with a damp sponge.
4. Work from top to bottom to avoid dripping dirty water onto clean slats.

Roller Blinds: PVC and Mesh

Roller blinds are common on Perth patios and alfresco areas, particularly Ziptrak systems that handle wind and weather well. PVC blinds are durable, but they still need regular cleaning to prevent mould and dirt buildup.

1. Start by hosing off loose dirt and debris.
2. Use a bucket of warm water with a small amount of mild detergent, dip a sponge or soft cloth, and wipe the blind in a downward motion.
3. Rinse thoroughly with clean water to remove any soap residue, then let the blind dry fully before rolling it back up. In most cases, this takes a couple of hours on a warm day.

Mesh roller blinds need a gentler touch. Avoid scrubbing too hard, as this can damage the weave. A soft brush dipped in soapy water works best. Rinse carefully and allow plenty of time to air dry.

If you notice mould staining on outdoor blinds, it’s often because they’ve been rolled up while still damp. Always let them dry completely after rain or cleaning.

Fabric Blinds

Fabric blinds are beautiful, but they’re also the most vulnerable to mould and staining. The weave traps dust and moisture, and once mould takes hold, it can be hard to shift.

1. For general stains, a mixture of warm water and a small amount of laundry detergent works well.
2. Dab the stain with a sponge, don’t rub, as this can spread it.
3. Rinse with clean water and blot dry with a towel.
4. For mould, the vinegar solution is your best option. Spray it on, let it sit, then blot gently.
5. If the stain persists, a tablespoon of clove oil mixed into a litre of water can help. Clove oil is a natural mould killer, but test it on an inconspicuous spot first to make sure it doesn’t discolour the fabric.

Never soak fabric blinds. Too much water can cause shrinkage, warping, or permanent water marks. If the mould is extensive, it might be time to replace the blind rather than risk damaging it further.

Timber Look and Blinds With Other Materials

Timber look blinds add warmth to a room, but they need careful handling. Real timber can warp or crack if exposed to too much moisture, so avoid soaking them during cleaning.

1. Use a barely damp cloth to wipe down each slat, then dry immediately with a soft towel.
2. For mould, spray the vinegar solution lightly onto a cloth rather than directly onto the blind, then wipe the affected area. This prevents excess moisture from seeping into the timber.

Faux timber blinds (usually PVC or composite) are more forgiving. They can handle a bit more water, but it’s still best to dry them promptly to avoid water spots.

For aluminium blinds, cleaning is straightforward. They’re durable and can handle regular washing with soapy water. Just make sure to dry them to prevent water marks.

Causes & Health Risks of Mould Growth

Mould grows when three things combine: moisture, warmth, and organic material to feed on. Blinds tick all these boxes. Dust settles on the surface (organic matter), condensation from windows adds moisture, and Perth’s mild winters keep indoor temperatures in the range where mould thrives.

Breathing in mould spores can trigger allergies, asthma, and respiratory issues, particularly in children and older adults. Black mould is especially concerning and should be dealt with quickly. If you notice a musty smell in a room, check the blinds first, they’re often the culprit.

The WA Department of Health recommends removing mould as soon as you spot it. Small patches can be handled with household cleaners, but if the affected area is larger than a square metre or keeps coming back after cleaning, it’s worth calling in a professional.

Long-Term Tips to Prevent Growth of Mould

Stopping mould before it starts is easier than cleaning it off. Here’s how to keep your blinds sparkling clean and mould-free:

• Keep indoor humidity between 40-60%. Use a dehumidifier in damp rooms or during winter
• Open windows regularly to improve airflow, even on cooler days
• Wipe condensation off windows each morning before it drips onto blinds
• Dust blinds monthly with a microfiber cloth to remove the organic matter mould feeds on
• Don’t roll outdoor blinds up while they’re wet
• Check window seals for leaks and fix them promptly
• In bathrooms, run the exhaust fan during and after showers

If you’ve had recurring mould issues despite regular cleaning, it’s worth checking your home’s ventilation. Sometimes the problem isn’t the blinds, it’s the environment they’re in.

Keep Your Blinds Clean and Your Home Healthy

Sometimes, despite your best efforts, blinds are beyond saving. If mould has penetrated deep into fabric, or if your outdoor blinds are showing signs of wear from Perth’s harsh sun and salt air, replacement might be the smarter option.

Outdoor Blinds Perth can assess your space, recommend blinds suited to WA conditions, and arrange removal and installation of new custom blinds. If your current blinds are constantly mouldy, we can also suggest better materials or styles for your specific situation.

However, If your blinds are past saving, or if you’re ready to upgrade to something that suits Perth’s climate better, contact us.