Being composed of 97% air, Expanded Polystyrene (EPS) is a great product that is widely used for floatation. One cubic foot of EPS is capable of supporting 60 pounds of weight. Whether you need to replace that EPS in an existing dock or a completely new project, Harbor Foam can help.Did you know? Seattle's construction codes apply to floating homes and have requirements similar to those for houses built on land. Floating homes are required to be located in approved "floating home moorages" and have direct connections to sewer and water utilities, in addition to other location and design restrictions.