A minimum of 72 hours between these coats in average dry temperatures, however this can be up to 7 days in cold, wet, and wintery conditions, and is obviously weather and render thickness dependant. Render will obviously take longer to dry the thicker it is applied, and the cooler the conditions. Unitex recommends a substrate must be dried to a minimum WME 12% (Wood Moisture Equivalent – moisture meter) prior to applying the Unitex texture coats.