Scraping weberpral M monocouche

As the seasons change, there are many challenges that face monocouche render application. From October through to Spring, it isn’t just the risk of rain, frost or the limited daylight, it’s also about making judgement at what point of the day is paramount to apply monocouche to maintain the best quality and have the highest productivity?

One option is to apply late afternoon and scrape the following morning. However, this has many drawbacks. If temperatures are high overnight this will lead to more time spent scraping as the render will be harder. Likewise, if the temperatures are cooler and/or damp then scraping may not be possible first thing and affect your plans for the working day. Inconsistency in scraping render at different points of the set is the easiest way to create colour problems. Early scraping will impart a darker shade and a late scrape will induce a light shade. Both ends of the scale will also affect texture of the monocouche render. 

From a productivity view, scraping the same day has unrivalled benefits. It means one visit to the scaffold, completion of the work so another job can be started and not having to come in on Saturday if you spray on Friday. It also allows you to work when the weather window is limited. Weber has an option to remove the anomalies and be in control of the render as opposed to the other way around. You can arrive on the job in the morning and based on the weather and other site conditions guarantee to scrape the same day even in cooler weather. By using weber accelerateur monocouche in your monocouche it will accelerate the initial set so that at 5°C the scrape time will be the same as monocouche at 20°C (approx. 4 hours). This means you can continue a same day scrape all year around. weber accelerateur monocouche is supplied in 20 litre drums and requires just an addition rate of 0.1 litres per bag of render. One 20 litre drum is sufficient for 200 bags of render (approx. 200m²).

weber accelerateur monocouche needs to be mixed thoroughly into the gauging water before adding powder. When using a discontinuous mixer pump (such as a Putzmeister P11) the dosage per 6 bag mix is 0.6 litres of weber accelerateur monocouche replacing the same proportion of gauging water. When using a continuous mixer pump such as an M-tec Duomix or PFT G4 every 10 litres of gauging water must include 0.2 litres of weber accelerateur monocouche. If you would like to learn more on how to use this product effectively Weber offers a training course on monocouche renders at the purpose built Saint-Gobain Technical Academy where this subject will be demonstrated with instruction. Alternatively you can make an appointment with your regional application manager who can visit you on site to provide a tool box talk on this subject.

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