skill in the art will recognize other means of attachment of the buoyant cells is feasible such as using bolts or screws or using bridges secured to the top or bottom surface of the buoyant cells accordingly this depiction of the preferred embodiment of the extruded gripping slot 314 is for illustrative purposes only and is not intended to limit the scope of the invention referring to fig4 one method of joining two subsections such as that of fig1 is shown the frames 410 412 of the respective subsections 414 416 are positioned so that a gasket preferably a self stick gasket 418 can be placed between them to form a seal and toggles 420 can be positioned at appropriate intervals down the length of the frames 410 412 to securely tie subsections 414 416 together thus any number of subsections 414 416 can be assembled side to side or end to end as necessary to form the needed area for the full contact floating roof referring to fig5 a 5b and 5 c various configurations of the interior of the buoyant cell 510 are shown the sub cells 512 may be filled with a gas through valves or alternatively couplings 513 such as an inert.