The inflatable business is very susceptible to inclement weather. Rain, lightning, wind, and snow can all put your equipment and attendees at risk. Because of this you need to always stay on top of the weather forecast leading up to, and throughout, the day of the event.
The question of what constitutes inclement weather is certainly a matter of opinion. You need to use your judgment with regard to allowing the rental of your inflatable products for an event. A snowstorm or sleet and hail are also almost always enough to cancel the inflatable for the event. Inflatables should also not be used in winds that exceed 25 mph. This type of weather is not only unsafe for the event attendees, but it also puts your equipment at risk of being damaged. Rain is another judgment call for your and your business. Water can make many inflatables very slippery and unsafe.
If the weather changes during the day of an event and becomes unsafe for attendees to use the inflatable equipment everyone should be removed from the equipment immediately. During rain simply leave the blower on until the rain stops.
When a customer is booking an event you should always make them aware at that time of the weather and refund policies for your equipment. If possible, having this information in writing, as well as told verbally to the customer is optimal. Being up front with your customers will head off any problems or bad feelings if the weather is not cooperative and you cannot provide the equipment for an event.
Inflatable businesses vary with their refund policy with regard to inclement weather. Some businesses require customers to cancel a minimum of four hours prior to the event to qualify for a full refund. This type of policy puts you at risk for disgruntled customers if the weather changes at the last minute or you yourself choose not to attend the event because of the weather. A little flexibility with your policy will go a long way in establishing positive relationships with your customers.
If you are forced to withhold inflatable products at an event because of the weather, and the event is still being held, it may be useful to offer your customer other products (concessions, add-ons) that your company may have available. This may also help to establish a positive relationship with your customer, appeasing them and still helping to create a successful event.
At the very least, to protect yourself and your business it is a good idea to require a small (10% or so) non-refundable deposit when a customer reserves equipment. If your customer is interested in rescheduling the event and your services then you should be open to this.
Remember that the ultimate decision whether or not to use your inflatable during inclement weather should be left up to you. Consider the safety of the attendees and your equipment to make an educated decision.