Suffering from green deposits?

We love a green garden but we would rather not see our fence and patio turn green. This green layer consists of algae and mosses that seek out shady and damp spots. There they form a slippery layer that creates a sludge hazard and gives your terrace an unkempt look.

After the gloomy winter months when we get little sunlight, it's not surprising that algae and moss take over your terrace. Moss makes no difference in the surface and does well anywhere: on wood, stone, tiles ... So not only your terrace is affected but also your fence, walls, driveway, roof, sidewalk ... are provided with a slimy and green jacket.

At the sight of a green patio or fence, it is tempting to bring out the pressure washer. This may be an environmentally friendly tactic, but it is only a temporary solution that also damages your deck. The high water pressure will remove the protective layer of the terrace, making it more porous and thus more prone to algae. In addition, with tiles and clinkers, the sand can be squirted out of the joints. So put those high-pressure sprayers back in the shed and switch to special green attack fighters.

Tip from Marcel: leave out the bleach

This home remedy is often used against green deposits. It may give you a clean terrace in the short term, but we are not in favor of it! Bleach, but also vinegar, is harmful to your lawn and plants. It also has no (long-lasting) after-effects, which means that the mosses and algae will unite again on your terrace after some time. Moreover, you will have to scrub very hard to clean your tiles and remove the green slime layer!

Quelle est la différence entre les dépôts verts et les dépôts noirs ?What is the difference between green & black deposits?

Green and black deposits are both forms of organic material that can accumulate on outdoor surfaces such as walls, patios, driveways and roofs. Although they appear similar, they differ in several areas:

• Colour:

The most striking difference is the colour. As the name suggests, green scale is green in colour, while black scale is a dark, black or sometimes brown colour.

• Cause:

Green deposits are usually caused by algae, while black deposits are caused by fungi, such as mildew or black mould.

• Location:

Green deposit thrives in humid conditions and can especially occur in areas exposed to moisture, such as shaded areas or places where water can accumulate. Black mould is common on surfaces exposed to moisture and little sunlight, such as in damp basements, bathrooms or areas with poor ventilation.

• Treatment:

Although both types of deposits can be treated with detergents and cleaning methods, the techniques may differ because of the various organisms they cause. Green deposits can be effectively removed with algae removers, while black deposits often require a more thorough approach, possibly with fungicides.

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