I'm planning to do some patch repairs of tyrolean render in the next few days. But I'm worried that conditions are a bit iffy ie: a bit cold and wintery. Instructions say not to apply if frost predicted in the next 24hrs and that the temp needs to be above 5 degrees until the render hardens. My question is, how long does that take? If it's 8 degrees in the day when i apply it and it drops to 4 deg overnight, is that okay?

