How to remove algae from PVCu window frames
As the wetter months approach and deciduous trees and shrubs start to lose their foliage, it is common to see the formation of green algae on window frames and sills.
Algae growth is a natural process, which requires a mix of conditions including moisture, natural light and temperatures of between 20 and 30 degrees. Algae on windows is unsightly and, if left untreated, it can lead to discolouration of your PVCu window frames and sills.
Here we take you through the best approach to remove algae from windows.
Regular cleaning is key
The best approach to keeping your PVCu windows and doors in good condition is to clean them regularly.
If you live in an urban area, close to heavy traffic, every 3 months is a good rule of thumb. You’re likely to notice a build-up of atmospheric deposits within this timeframe.
In more rural areas, every 6 months is usually a good approach. Here, deposits tend to be organic in nature and less damaging to your window frames and sills.
Regular cleaning of your windows also helps you to know which areas are most prone to algae and dirt collecting and building up. For example, if there’s an area of your home that’s more shaded with less air circulation, this can be more vulnerable to damp conditions and algae or mould formation.
The best way to clean algae from white window frames
Safety first
It is always advisable to take time to make sure you have considered your safety when approaching cleaning your windows, particularly when using ladders.
Window algae cleaner:
With PVCu windows, the best cleaning solution is a mild one. A mix of warm water and a mild detergent, such as washing up liquid, is usually all you’ll need. Avoid using abrasive or harsh products or cloths as they can damage the frames and sills.
Elbow grease
Use a soft brush, sponge, or cloth soaked in the cleaning solution to gently scrub the algae-covered areas. Start from the top and work your way down to prevent streaking.
Stubborn algae
Where algae have been able to build up, there are certain products that are recommended such as sodium percarbonate, or ‘oxygen bleach’. This is a natural and gentle alternative to chlorine bleach that is also biodegradable.
Sodium percarbonate is known for its ability to remove dirt, mould and algae and is particularly effective on white surfaces. Most oxygen bleach products come in the form of a powder to be mixed with water.
Please note that Window Wise do not endorse any specific products for use on our PVCu windows. We always advise a cautious approach when trying any new cleaning products and to refer to the Window Wise Operation and Maintenance Guide.
Rinse
Fresh water should be used to rinse the windows thoroughly, ensuring all soap or cleaning product residue is removed.
Repeat
You may find that a second clean really pays dividends to brighten your PVCu window frames and ensure that any algae residue is fully removed from crevices.
Algae on window panes
If algae have formed directly on window panes, a spray bottle with a mild, gentle cleaning solution is a good approach. Spray it on, scrub with a non-abrasive cloth and carefully rinse.
Preventing algae build-up
Persistence is the best approach. Clean at regular intervals, but it’s also a good idea to ensure that water isn’t sitting on your window sills for long periods of time – this provides the ideal environment for algae and mould.
Wiping windows down with a clean, dry cloth, especially where windows are more shaded and have less air circulation, can minimise the risk of algae forming.
Expert advice
If you are considering upgrading your windows, whether to PVCu, aluminium or timber, please call us on 01444 45 71 45 to talk through your requirements.