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K-Rend and Render Cleaning

The external walls of our commercial and industrial properties can take a battering from the wet and windy British weather, causing excess algae and moss on these surfaces. Choosing the wrong non-specialist contractor, equipment or cleaning methods can lead to discoloration or even permanent damage to the surface of the building render, leaving more of an eyesore than the actual growth which was being removed.  Property owners and management companies are well advised to employ the services of a specialist render cleaning company in order to ensure that damage and further staining is not incurred.

At APT-ICC we are highly experienced in all commercial building cleaning methods and the most efficient and effective way to remove algae and moss from a building facade without causing damage to the render. Algae is probably the most common problem when it comes to render cleaning and cladding cleaning.  As well as ruining the building’s appearance, algae tends to grow within the pores and joints of brickwork, cement and render surface leading to structural weaknesses which can become loose or dangerous if left untreated.

Our research shows that using specialist algae remover products, such as our specially developed Algae Free, will kill off  biological organisms such as algae and moss ensuring that the underlying render is ready to be gently washed down. Click here to see a recent case study that had outstanding results. 

How to Safely Clean Cement, K Render and Cladding off Buildings

At APT-ICC, we have a proven track record in removing algae and moss from rendered surfaces, first treating the outside walls and then finally cleaning the building down with our specialist, low-pressure super heated washers removing algae stains or marks.

Safe Algae Removal Treatment & Render Cleaning  Service

We have seen several cases recently where the local property managers or budget holders of schools or other public and commercial buildings have directly instructed local builders and commercial contractors to pressure wash or high pressure jet wash k render  to remove algae from  commercial and retail buildings as well as large scale residential housing estates.

This is not a recommended or recognised as a safe cleaning method. K render surfaces should first be treated with effective algae killer to kill off the algae spores to stop the growth and then wash and clean down the render using only super heated low pressure high steam to remove the surface dirt and remaining algae staining.

How to Prevent Algae and Moss Build Up on Render

You should allow to treat the render with effective algae removal products on a regular maintenance cleaning programme using a and specialised algae treatment usually every 12-24 months depending on the property location and atmospheric conditions or when you see the first signs of discolouration.

The use of high pressure jet washing “simply put is a sledge hammer to crack a nut” and is not an effective method as this can drive water deep into the render surface, joints and small cracks and can damage the k render surface. This process does not kill off the algae spores and they will simply continue to grow and show up again just a few months later.

Further and more importantly, high pressure jetting can lead to the water penetrating in behind the k render surface and then some of the water droplets can become trapped and settled. This can cause devastating problems in later years when these trapped water droplets freeze in sub-zero winter periods and expand to cause cracking, spoiling or blowing of the k render surface leading to extremely costly k render patch repairs or full panel replacement in future years.

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