March 03, 2022
Because of the many variable factors, it's impossible to give an exact time during which a soft washed roof will re-colonise and need soft washing again. But as a very rough approximation an "average" roof will stay clean for around 3-5 years.
The best way to give your customers the longest lasting clean on the first visit is to apply a strong treatment of Bio Cleanze at 20-25:1, ensuring the spray gets under the laps, between the tiles and in all other surrounding nooks, crevices, cracks and crannies.
Moss will take longer to re-colonise than algae, although the presence of overhanging trees will encourage it.
Without overhanging trees a roof can remain clean of moss, lichen and algae for several years. This is especially true of relatively porous surfaces such as clay tiles when treated with Benz Bio Cleanze.
The presence of overhanging trees will mean that re-colonisation will inevitably happen more rapidly, sometimes as soon as 6-9 months in the case of green algae. This is due to the shielding from wind, shading from sun, and the accumulation of fallen leaves.
Quick tip: Just one leaf decomposing on a roof can give rise to the spread of algae, and can leave an unsightly green streak.
Fortunately this is not the norm and these green streaks will often die away in the spring and summer, or can be re-treated with a relatively weak solution of Bio Cleanze, say 40-50:1.
Scraping and then treating with Benz Bio Cleanze is our recommended way to treat most porous roof surfaces, and even many non-porous surfaces such as slate. Non-porous surfaces such as pvc coated steel cladding and plastic sheeting is usually best treated with Benz Lightning Cleanze at 5-10:1.
For a quick maintenance treatment it's possible to spray from the top down without the need to pay particular attention to the laps and joints as you would when giving a full treatment.
Using our "Clean & Maintain" softwash systems means you will use less chemical and your time on site will be minimised.
Bio Cleanze will soak deeply into porous surfaces (even deeper than water can), providing residual protection against re-colonisation. How long that protection will last for is impossible to say in absolute terms because it depends on multiple factors, such as:
Quick tip: Enter a relevant "keyword" or short phrase into our in-site Search Engine to find answers to most of your softwashing questions (e.g. keyword for above link = "run-off")
We hope this information is helpful and sincerely wish you great success in your soft washing business,
Ben, Leo, Fiona, Stevie & Anthony
GB (England, Scotland, Wales)
Phone: 0800 70 74 222
Ireland and other countries
Phone: 00353 214 622 978
Lines open Monday - Friday, 9am – 5pm
Please note: The above numbers are for orders only (click here for tech support)
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May 17, 2022
Is it safe to use a sodium hypochlorite (sh) based product – such as Benz Lightning Cleanze softwash biocide – with ropes, or will it damage them?
Click the link on this page to find out ...
May 11, 2022
Why should you use Benz Tornado Cleanze, a powerful softwash cleaning gel? What are its uses and advantages?
Click the link on this page to find out ...
May 03, 2022
Shadow, or "ghost" staining may sometimes remain after soft washing. Customers can misinterpret this as poor workmanship. But fortunately there's a simple solution that keeps everyone happy.
Click the link on this page to find out what it is ...
It's a free resource for people wanting to learn about the soft washing industry, to expand an existing business, or build a new business.
Soft washing reduces, or even eliminates, the need to use high-pressure washing.
Instead, once the build up of algae, lichen, fungus, moss and mould – the root causes of properties looking "dirty" – has been treated, the natural "self-cleansing" of sun, rain and wind removes the surface residue through time.
By educating the cleaning trade and public about soft washing we are helping develop an industry that offers sustainable treatments to clean and maintain exterior hard surfaces.
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