How to Clean Mould Off Outdoor Blinds
A step-by-step guide to removing mould from outdoor blind fabrics safely, with the right cleaning solutions and preventative habits to keep your blinds performing year after year.
Knowing how to clean mould off outdoor blinds is one of the most useful maintenance skills an Australian homeowner can have. Mould appears after extended wet weather, in humid climates or wherever blinds have been rolled up while still damp. Left untreated, it degrades fabric coatings, causes persistent staining and shortens the life of the blind significantly.
The good news is that you can clean mould off outdoor blinds effectively with the right approach and the right products. This guide walks through the cleaning process step by step, covers which solutions are safe to use on Ziptrak® fabrics, and outlines the simple maintenance habits that prevent mould from returning.
Understanding the problem
Why Mould Grows on Outdoor Blinds
Mould is a fungus that thrives wherever moisture, warmth and organic matter come together. Outdoor blinds create that environment more readily than most surfaces — they are exposed to rain, humidity and airborne organic particles like dust and pollen, and the rolled fabric traps moisture against itself when the blind is stored.
The single most common cause of mould on outdoor blinds is rolling them up while wet. After rain or after cleaning, a blind that goes up before it has fully dried will hold moisture against the fabric for hours. Over time that repeated moisture exposure causes mould spores — which are always present in outdoor air — to take hold and grow.
High-humidity climates, shaded outdoor areas and blinds near pools or water features are particularly susceptible, but mould can develop on outdoor blinds anywhere in Australia given the right conditions.
Before you start
What You’ll Need
Gather these items before you start. Having everything to hand makes the process faster and reduces the chance of using something that could damage the fabric.
Avoid: bleach, harsh chemical cleaners, high-pressure washers and abrasive scrubbing pads. These can strip protective fabric coatings, weaken fibres and cause discolouration that cannot be reversed.
The cleaning process
How to Clean Mould Off Outdoor Blinds: Step by Step
Lower the blind fully and brush off loose debris
Lower the blind to its fully open position. Use a dry soft-bristle brush to gently remove any loose dust, cobwebs, leaves or surface dirt before introducing water. This prevents debris from turning into mud during the wash and scratching the fabric surface.
Pre-rinse with a gentle hose
Using a garden hose on a gentle setting, rinse the blind from top to bottom to remove surface dust and wet the fabric. Avoid high-pressure jets, which can force water into the fabric weave and potentially damage the coating or the mechanism housing.
Apply your cleaning solution
Use Ziptrak® Swiftee® cleaner as directed on the packaging, mixed in a bucket of water. Apply the solution to the affected areas with a soft brush or sponge, working gently in circular motions. For heavier mould patches, allow the solution to sit on the fabric for two to three minutes before scrubbing.
Scrub the mould gently
Work over the mouldy areas with the soft-bristle brush using steady, moderate pressure. Avoid scrubbing too hard — the goal is to lift the mould from the fabric surface, not to grind it in deeper. For clear PVC panels, use a soft sponge rather than a brush to avoid fine surface scratches.
Rinse thoroughly
Rinse the entire blind from top to bottom with the garden hose until all soap residue is removed. Leftover soap residue can attract dirt faster and may also cause streaking on clear PVC. Rinse both sides of the fabric if accessible.
Allow to dry completely before rolling up
This step is critical. Leave the blind in the fully lowered position until the fabric is completely dry before rolling it up. In warm conditions this takes one to two hours. In cooler or humid weather, allow longer. Rolling a blind up while still damp is the leading cause of mould returning after cleaning.
Tip: Ziptrak® Swiftee® is specifically formulated for outdoor blind fabrics including sunscreen mesh and clear PVC, and is the recommended cleaning product for Ziptrak® outdoor blinds. For full guidance, see the blind cleaning page and the Swiftee® Cleaning Brochure.
What to use
Safe Cleaning Solutions for Outdoor Blind Fabrics
The fabric used in outdoor blinds has protective coatings applied during manufacture that resist UV, moisture and abrasion. Using the wrong cleaning product strips these coatings and reduces the long-term performance and appearance of the blind. For this reason, we recommend cleaning Ziptrak® outdoor blinds with Ziptrak® Swiftee® only.
Ziptrak® Swiftee® — Purpose-formulated for Ziptrak® outdoor fabrics and safe on sunscreen mesh and clear PVC. Swiftee® is the recommended cleaning product for Ziptrak® outdoor blinds. See the blind cleaning page for full details.
Follow the Swiftee® instructions — Use Swiftee® as directed for the best results on mould and general dirt. The Swiftee® Cleaning Brochure covers the full cleaning method step by step.
Avoid bleach and solvent-based cleaners — These strip protective fabric coatings, cause discolouration and accelerate UV degradation. Never use bleach on Ziptrak® fabrics.
Thinking about replacing your outdoor blinds or adding new ones? Use the Ziptrak® Design Your Blind tool to explore fabrics, colours and configurations before speaking with a local retailer.
Design Your Blind →Stopping it coming back
Preventative Maintenance: How to Stop Mould Returning
Cleaning mould off outdoor blinds is straightforward when caught early. Preventing it from coming back is even simpler — it comes down to a few consistent habits that take very little time.
Never roll up a wet blind — After rain or cleaning, always wait until the fabric is completely dry before raising the blind. This single habit prevents the majority of mould issues.
Clean regularly — A light rinse and wash every three to six months removes the organic matter that mould feeds on before it becomes a problem. More frequent cleaning is worthwhile in humid climates or areas with heavy tree cover.
Allow airflow when not in use — If possible, lower the blind slightly rather than leaving it fully rolled to allow air circulation around the rolled fabric, particularly during extended wet weather periods.
Inspect after each wet season — Check the blind at the end of winter and after any extended wet period. Catching mould early means a simple clean rather than a heavy treatment session.
Common questions
FAQs: Cleaning Mould Off Outdoor Blinds
Need new outdoor blinds?
Find a Local Ziptrak® Retailer
If your outdoor blinds have reached the end of their life, speak with a local Ziptrak® retailer about a replacement. Professional measuring and installation included.
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