How to Protect Day and Night Blinds from Sun Fading

Day and night blinds fade because their alternating sheer and solid fabric bands sit very close to the glass, taking the full force of UV radiation for hours at a time.

South and west-facing windows are the worst offenders.

A few straightforward habits and one or two preventative additions to your window will slow fading down significantly.

What You’ll Need

Tools

• A soft microfibre cloth
• A spray bottle

Materials

• UV-blocking window film (adhesive, designed for interior glass application)
• Mild fabric cleaner (pH-neutral, no bleach)
• Distilled water

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How to Fix It: Step-by-Step

Step 1: Add UV Window Film to the Glass

This is the single most effective thing you can do. Day and night blinds don’t block UV light, they filter it. Even on the sheer setting, UV radiation passes straight through. Window film applied directly to the glass intercepts UV before it reaches the fabric at all.

1. Buy a window film rated to block at least 99% of UV radiation. These are widely available online and in DIY stores.
2. Clean the glass thoroughly before applying. Any dust or residue will trap bubbles under the film.
3. Cut the film slightly oversized, then trim to fit once applied.
4. Use a squeegee or flat card to work out bubbles from the centre outwards.
5. Leave 48 hours to fully adhere before touching.

Most good-quality films are nearly invisible once installed. They won’t change the look of your window or how the blind operates.

Step 2: Adjust How You Use the Blind During Peak Sun Hours

A day and night blind left fully open in a south-facing window on a July afternoon is basically sitting in a UV oven. You don’t need to keep the room dark. You just need to stop the same section of fabric taking a sustained battering.

1. During peak sun hours (roughly 10am to 3pm in summer), rotate the blind to its sheer position. You keep the light and the view, but the solid bands aren’t sitting stationary in full sun.
2. If the room is unoccupied during the day, draw the blind to the closed position. It takes seconds and makes a real difference over months.
3. On very sunny days, consider drawing the blind lower so the most UV-exposed section (usually the upper portion nearest the top of the window) shares the load with the lower fabric.

Step 3: Rotate the Blind Periodically

Even with the adjustments above, some fading will happen. Rotating the blind swaps which end of the fabric faces up, so fading spreads evenly rather than hitting the same band repeatedly.

• Most day and night blinds can be re-hung with the fabric reversed. Check whether your brackets allow this.
• If your blind uses a cassette housing, the fabric rolls differently reversed, so test this carefully before committing.
• As a rule of thumb, rotate twice a year. Once in spring before the intense sun hits, once in autumn.

Step 4: Clean the Fabric the Right Way

Cleaning done badly speeds up fading. Bleach-based sprays strip the coating from synthetic fibres and leave the fabric more vulnerable to UV damage. Harsh scrubbing physically abrades the weave.

1. Use a pH-neutral fabric cleaner diluted in distilled water. Hard tap water can leave mineral deposits that degrade the fabric slowly.
2. Spray lightly onto a microfibre cloth, then dab rather than rub.
3. Don’t soak the fabric. Day and night blinds aren’t designed to be saturated, and wet fabric left in sunlight will fade faster, not slower.
4. Let the blind dry fully in a shaded position before rolling it back up.