Most render systems are best applied in optimal weather conditions – ideally between 5oC and 35oC, with no rain, wind or snow. However, some projects may have to be undertaken in less-than-ideal conditions either due to time or budget constraints, so it is vital that the risks and challenges of applying render in adverse weather conditions are fully understood.
Know your conditions
It goes without saying that before you begin the application process of any render, you should read and fully understand the application instructions supplied by the manufacturer.
The type of render system being applied is another factor to consider. Dry dash systems are more resilient to wet and cold weather than their silicone counterparts.
It is also advisable to check the weather forecast for your planned application dates – try to avoid any days with excessive rain, wind, heat or cold. Extreme weather conditions can severely affect the both the application and drying / curing times of the render.
In hot weather, do not apply render on walls which are exposed to direct sunlight. Instead, start on an adjacent wall in the shade and follow the sun around the building. This method allows you to work in sunny weather, whilst avoiding any curing issues direct sunshine may cause.
Certain weather conditions will slow the curing process down – usually due to colder temperatures (less than 5oC) or high humidity (90% and higher). If this is the case, then the render will retain moisture for a longer period of time and if sustained will become more susceptible to damage from trapped moisture so it is essential that the render system is protected during this stage.
Ask an expert
At Rendit, we offer a 2-year crack free guarantee on our Render Systems, so if you need any help applying your render contact Rendit today!