In most cases, they’re not generally recommended for bathrooms due to their susceptibility to moisture and humidity. Direct contact with water or prolonged exposure to moisture in the air can eventually lead to fabric shrinkage, discolouration and even mould and mildew growth. There are exceptions, such as large well-ventilated bathrooms with windows far from water sources. Roman blinds made from polyester are more durable than natural fabrics such as silk or cotton. However, they will still be vulnerable to mould and mildew in humid environments.