Efflorescence - The Ins & Outs

While generally not harmful to the structural integrity of your masonry products, efflorescence can detract from their appearance, which is particularly noticeable on darker colored surfaces. However, there's no cause for concern. This guide will outline the simplest and most effective methods for removing efflorescence from your outdoor spaces.

What is efflorescence?

Efflorescence is when salts and minerals seep out of your pavers or retaining wall blocks due to moisture entering the masonry, whether from rain, dew, or even watering. When the sun comes out, it draws out the moisture, carrying minerals from within the masonry to the surface. This process is harmless to the structure but can be visually unappealing, leaving behind mineral deposits that make your pavers look faded and dull.

How do I get rid of it?

Start Gently:

The most effective way to remove efflorescence from your pavers is by using a soft-bristled broom. Begin by dry brushing the pavers to eliminate the white, powdery deposits. Follow up by using a dustpan or vacuum cleaner to collect the solidified material. Next, scrub the pavers with a brush and clean water. This method is gentle and minimizes the risk of surface damage.

Not Getting The Desired Results?

Alternatively, for larger areas, heavily soiled surfaces, or stubborn deposits, you can use a high-pressure water cleaner. Exercise caution when using this method to avoid damaging the concrete blocks or pavers, as excessive water pressure or frequent cleaning can lead to surface wear.

Bring Out The Big Guns:

If neither of those methods proves effective, you can consider acid washing as an alternative. However, it's crucial to proceed with extreme caution, as improper application can lead to streaking, fading, or unintended colour changes on your masonry products. Ensure you select an acid specifically formulated for your type of masonry, as some acids are only suitable for certain types of stone. For example, ‘Environex Anti Eff’ is safe for certain concrete products, but it should not be used on Bluestone, Travertine, Marble, Limestone, or Limestone composite products. Always read and follow the instructions carefully before use to ensure compatibility and effectiveness.
We also recommend testing any cleaner on an inconspicuous area to ensure it won't harm the material or alter the colour.

How can I prevent it from coming back?

Prevention is ideal, but efflorescence cannot be entirely avoided. Applying a clear sealant over your pavers can create a barrier to help reduce the amount of moisture your masonry absorbs to help prevent or minimize the formation of efflorescence.
It's beneficial to stay proactive by regularly removing efflorescence deposits before they harden and become difficult to clean.

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