Flooring materials must provide a good grip when wet. Proper drainage is essential to prevent a build-up of water around the hot tub. A floor drain is recommended. An architect can help to determine if more ventilation must be installed in the room. Your hot tub Dealer can help you with local information such as zoning regulations and building codes. If the installation is to be below ground, always water test the installation prior to permanently enclosing it to ensure that no leaks are present.