November 18, 2021
Soft washing heavily blackened stone and concrete window sills and wall capping stones can be challenging and requires skilful application of the correct soft wash products.
Quick tip: Usually the blackening is caused by a colonisation of black algae. But check that it is caused by black algae and not carbon from road traffic and aircraft, which requires different specialist treatment.
In our experience the most effective way to clean blackened window sills, window surrounds, and wall capping stones is to first spray treat with Benz Lightning Cleanze biocide (4:1). This will kill the black algae and sanitise the surface. Then follow up by brushing in, usually neat, Benz Tornado Cleanze.
This is an example of the type of cleaning contract we created Tornado Cleanze for. Simply apply neat with a brush, or sometimes, if the colonisation is minimal, dilute up to 50%. The activation time needed will depend on the severity of the colonisation and the local temperature.
Quick tips:
1) Rinse well prior to giving a post-treatment with Benz Bio Cleanze.
2) And protect any plants or lawns that could come into contact with the rinse water.
How to find answers to most soft washing questions: Simply enter a relevant "keyword" or short phrase – e.g. keyword for the above link = "tornado" – into our in-site Search Engine (magnifying glass icon on the main menu).
GB (England, Scotland, Wales)
Phone: 0800 70 74 222
Online: www.benzsoftwash.co.uk
Ireland and other countries
Phone: 00353 214 622 978
Online: www.benzsoftwash.com
Lines open Monday - Friday, 9am – 5pm
Please note: The above numbers are for orders only (click here for tech support)
We hope this information is helpful and sincerely wish you great success in your soft washing business,
Ben, Leo, Fiona, Stevie & Anthony
PS: After completing the first soft wash treatment, put your customer on a "Clean & Maintain" ongoing maintenance programme. Your customers will enjoy a permanently clean property and you will enjoy a steady stream of repeat business.
This is clearly a win-win arrangement for both customer and contractor.
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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 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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