A guide to render cleaning

A guide to monocouche render cleaning from Saint-Gobain Weber

Render offers a clean, modern, and attractive finish for your home which will last for more than 20 years if properly maintained. Although render is low maintenance, you may need to wash it down from time to time, which is why we’ve created this handy guide on how to clean coloured render and keep it looking fresh for years to come. This guide will also teach you how to remove green algae, which is a common concern for those with rendered walls.

1. Watch out for vegetation

Any organic growth on the surface will make your beautifully rendered home start to look grubby. Gently remove any ivy, moss or other greenery using a brush, and then treat the entire wall with a render cleaner such as weber CL150. Watch our video below for a step-by-step guide on how to clean render.

Even if there’s no sign of growth on the building, it can be a good idea to give it an occasional wash with weber CL150, which will kill a broad range of bacterial, fungal and algal species including green algae. This will not only keep the render looking fresh, but will slow down algae build-up before it becomes noticeable.

2. Wash it down

If you're looking to remove stains from your render, or if it's just looking a bit grubby, give the building a good wash using a pressure washer and a mild detergent. Take care to adjust the pressure washer to a fan action rather than a jet action as this could damage the render. There’s no exact rule as to how often you should be washing your render — once a year or as often as necessary to keep it looking great. 

Please note: Pressure washing is unsuitable for dry dash finishes.

Protect it

If it's a weberpral monocouche render you're looking after, you can add an extra layer of defence with a hydrophobic coating. weberend protect is a water-repellent coating for protecting exterior renders from water, oil and graffiti, cutting down on future maintenance whilst allowing the render to breathe. weberend protect can be applied by spray application or by brush or roller. Take a look at the tutorial on the weberend protect product page for more details.

Looking to switch up your render without going for a full redo? Why not go for a colour change? webersil p, our low-maintenance resin paint is suitable for application to our weberpral range of renders, provided they are clean, sound and dry.

Click Compare to help you choose the right product for your project, if you need further assistance please email technical@netweber.co.uk

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